Article
Chemistry, Physical
Meijiao Xing, Dayong Jiang, Man Zhao
Summary: A new sandwich-structured photodetector (SSPD) was designed and fabricated to solve the problem of weak light detection in traditional metal-semiconductor-metal (MSM) photodetectors. A high external quantum efficiency (EQE) was achieved by growing Ga2O3 film layer on the electrode area of the ZnO/Au MSM-structured device. The ZnO/Au/Ga2O3 SSPD showed an EQE of up to 11626% at 30 V, which is 18 times higher than the traditional ZnO/Ga2O3/Au PD.
APPLIED SURFACE SCIENCE
(2023)
Article
Optics
Feng Xie, Yan Gu, Zhijia Hu, Benli Yu, Guofeng Yang
Summary: A high-performance back-illuminated solar-blind ultraviolet photodetector with ultra-low dark current, broad spectral response, and fast response speed has been fabricated in this study.
Article
Chemistry, Multidisciplinary
Harry M. Schrickx, Pratik Sen, Ronald E. Booth, Ali Altaqui, Jacob Burleson, Jeromy J. Rech, Jin-Woo Lee, Melike Biliroglu, Kenan Gundogdu, Bumjoon J. Kim, Wei You, Michael W. Kudenov, Brendan T. O'Connor
Summary: Polymer semiconductors can achieve exceptional in-plane polymer alignment for polarization sensitive photodetectors, leveraging their thermomechanical properties. By utilizing high and low weight average molar mass polymer blends, films with high dichroic ratios and polarized photocurrent ratios were obtained, showcasing the potential for incorporation into novel device architectures.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Ming Liu, Qunping Fan, Kaixuan Yang, Zijin Zhao, Xingchao Zhao, Zhengji Zhou, Jian Zhang, Francis Lin, Alex K-Y Jen, Fujun Zhang
Summary: In this study, photomultiplication-type polymer photodetectors (PM-PPDs) were achieved using P3HT and PY3Se-1V as the donor and acceptor, respectively. By adjusting the weight ratio and energy offset between P3HT and PY3Se-1V, PM-PPDs with broad spectral response and high external quantum efficiency (EQE) were obtained. Furthermore, incorporating a third component with high hole mobility can further enhance the performance of PM-PPDs.
SCIENCE CHINA-CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Maral Vafaie, James Z. Fan, Amin Morteza Najarian, Olivier Ouellette, Laxmi Kishore Sagar, Koen Bertens, Bin Sun, F. Pelayo Garcia de Arquer, Edward H. Sargent
Summary: Efficient ligand exchange route enables large-diameter CQDs to achieve high-efficiency passivation and charge transport, leading to CQD solids with external quantum efficiency greater than 80% at 1,550 nm. This technology has the potential to replace conventional III-V semiconductors and make significant advancements in the field of infrared photodetection.
Review
Chemistry, Multidisciplinary
Mohsen Rezaei, Simone Bianconi, Lincoln J. Lauhon, Hooman Mohseni
Summary: Photodetectors made from low-dimensional materials, such as quantum dots, nanowires, and two-dimensional materials, show great promise due to their high responsivities. However, it is important to note that maximizing internal gain may compromise detector performance at low light levels. The sensitivity of most low-dimensional photodetectors with internal gain is determined by junction capacitance, giving them advantages over bulk semiconductors in achieving high sensitivity.
Article
Chemistry, Physical
Shusheng Tao, Jieming Cai, Ziwei Cao, Bai Song, Wentao Deng, Youcai Liu, Hongshuai Hou, Guoqiang Zou, Xiaobo Ji
Summary: The slow ion transport in anodes hinders the match of cathode and anode kinetics and limits the development of lithium-ion capacitors. This study successfully engineered heterogeneous structures (FeSe2/CoSe2) with built-in electric field to promote lithium-ion migration and improve anode reaction kinetics. The designed heterostructure material exhibits exceptional rate performance and ultra-high pseudocapacitance contribution, surpassing the current state-of-the-art anodes. The increase of valence states of iron and cobalt elements during charging and discharging provides theoretical guidance for enhancing anode kinetics and understanding capacity rise mechanisms of other transition metal compounds.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Analytical
Jijie Zhao, Huan Liu, Lier Deng, Minyu Bai, Fei Xie, Shuai Wen, Weiguo Liu
Summary: A high-performance graphene/Si NTCAs photodetector was designed to overcome the issues of weak light absorption and surface recombination in traditional silicon-based photodetectors. This device had a high quantum efficiency of 97% at 780 nm wavelength and a short rise/fall time of 60/105 μs.
Article
Materials Science, Multidisciplinary
Xi Chen, Bo Yu, Jiawei Wang, Zhongzhong Luo, Haixing Meng, Boming Xie, Ruyi Zhou, Shujuan Liu, Qiang Zhao
Summary: Near-infrared (NIR) photodetectors are crucial in various fields. The low detection sensitivity of NIR organic photodetectors (OPDs) has limited their application. In this study, we developed a novel NIR-sensitive dye BODIPY-F for solution-processed NIR-OPDs, which showed excellent performance with high quantum efficiency and detectivity in the NIR range. The fabricated NIR-OPD was successfully integrated into a laser microphone system, achieving both NIR laser alarm and low-frequency communication with low delay and high fidelity.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Optics
Hamza Dely, Mahdieh Joharifar, Xiaodan Pang, Djamal Gacemi, Toms Salgals, Richard Schatz, Yan Ting Sun, Thomas Bonazzi, Etienne Rodriguez, Yanko Todorov, Angela Vasanelli, Aleksejs Udalcovs, Sandis Spolitis, Vjaceslavs Bobrovs, Oskars Ozolins, Sergei Popov, Arlo Sirtori
Summary: High bitrate mid-infrared links using NRZ and PAM-4 coding schemes have been achieved in the 8 pm to 14 pm atmospheric transparency window. The system utilizes quantum optoelectronic devices, including a continuous wave quantum cascade laser, an external Stark-effect modulator, and a quantum cascade detector, operating at room temperature. By employing equalization procedures, the system has achieved transmission bitrates of 12 Gbit/s NRZ and 11 Gbit/s PAM-4, fulfilling the 6.25% overhead hard-decision forward error correction threshold, limited by the low signal-to-noise ratio of the detector.
Article
Nanoscience & Nanotechnology
Mengqi Jiang, Yuli Wu, Jinfeng Nie, Yuyao Chen, Yong Fan, Xiangfa Liu, Yonghao Zhao
Summary: Heterostructured materials, such as the AlNp/Al composite studied here, have shown excellent mechanical properties at high temperatures. Isothermal compression tests revealed that the compressive strength of the AlNp/Al composite was maintained at room temperature and high temperatures (300-500 degrees C) throughout the deformation process. The combination of dispersive AlN nanoparticles, layered heterogeneous structure, and network structure prevented grain boundary softening and grain growth, as well as high temperature softening. The deformation mechanism of the composite was influenced by strain rate and temperature, with continuous dynamic recrystallization dominant at low strain rates and high temperatures, and dynamic recovery dominant at high strain rates and low temperatures. The strain rate sensitivity exponent (m) was used to assess the relationship between peak stress and deformation conditions, indicating that high temperatures and high strain rates should be avoided during hot deformation. This study sheds light on the microstructure design of high-strength heat-resistant aluminum matrix composites.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Bilal Chehaibou, Eva Izquierdo, Audrey Chu, Claire Abadie, Mariarosa Cavallo, Adrien Khalili, Tung Huu Dang, Charlie Greboval, Xiang Zhen Xu, Sandrine Ithurria, Gregory Vincent, Bruno Gallas, Gabriel Mugny, Arthur Arnaud, Emmanuel Lhuillier, Christophe Delerue
Summary: The complex optical index of PbS nanocrystal thin films is systematically investigated using broadband spectrally resolved ellipsometry. The results are compared with simulations and used to model the absorption in short-wave infrared diode stacks based on PbS nanocrystals, revealing a major limitation in the current devices.
Article
Engineering, Electrical & Electronic
Hanbee Lee, Soyeong Jeong, Jae-Hyun Kim, Yong-Ryun Jo, Hyeong Ju Eun, Byoungwook Park, Sung Cheol Yoon, Jong H. Kim, Seung-Hoon Lee, Sungjun Park
Summary: This paper introduces a strain-durable ultra-flexible semitransparent organic photovoltaic (OPV) device with a thickness below 2 μm. By achieving conformal surface coverage of nanoscale thin metal electrodes, the device exhibits extremely low flexural rigidity and high strain durability. After 1000 cycles of repetitive compression and release at 66% compressive strain, the device maintains over 73% of its initial efficiency, with average visible light transmittances higher than 30%.
NPJ FLEXIBLE ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Yuanhang Cheng, Xixia Liu, Zhiqiang Guan, Menglin Li, Zixin Zeng, Ho-Wa Li, Sai-Wing Tsang, Armin Gerhard Aberle, Fen Lin
Summary: The degradation of PVSCs can be divided into three steps: 1) dissociation of ions from perovskite lattices, 2) migration of dissociated ions, and 3) consumption of I- by reacting with metal electrode. Step (3) is crucial as it accelerates the first two steps leading to continuous degradation.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Emek G. Durmusoglu, Sujuan Hu, Pedro Ludwig Hernandez-Martinez, Merve Izmir, Farzan Shabani, Min Guo, Huayu Gao, Furkan Isik, Savas Delikanli, Vijay Kumar Sharma, Baiquan Liu, Hilmi Volkan Demir
Summary: This article presents the development of CdSe/CdTe/CdSe core/crown/crown (multi-crowned) type-II colloidal quantum wells (CQWs) and investigates their optical properties. The multi-crowned CQWs show a high quantum yield of 83% and a long fluorescence lifetime of 73.3 ns, surpassing traditional core/crown heterostructures. Proof-of-concept NPL-LEDs based on these multi-crowned CQWs achieved a record high external quantum efficiency of 7.83%.
Article
Engineering, Environmental
Kaixuan Yang, Zijin Zhao, Ming Liu, Zhengji Zhou, Kai Wang, Xiaoling Ma, Jian Wang, Zhiqun He, Fujun Zhang
Summary: Photomultiplication type polymer photodetectors were fabricated using PBDB-T:BTPV-4F and PBDB-T:BTR:BTPV-4F as blend active layers, achieving improved performance by controlling electron traps and hole tunneling in the blend active layers. The use of the regulator BTR optimized hole mobility in the blend active layers, leading to enhanced responsivity and external quantum efficiency of the PM-PPDs.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Wenjing Xu, Xiaoling Ma, Jae Hoon Son, Sang Young Jeong, Lianbin Niu, Chunyu Xu, Shuping Zhang, Zhengji Zhou, Jinhua Gao, Han Young Woo, Jian Zhang, Jian Wang, Fujun Zhang
Summary: The study explores the use of a ternary strategy to improve the power conversion efficiency of polymer solar cells (PSCs) by incorporating three different materials. Results show that the ternary PSCs exhibit significantly higher PCE compared to binary PSCs, mainly due to an increase in fill factor. This approach has demonstrated great potential for preparing highly efficient PSCs by optimizing molecular arrangement and layer thickness simultaneously.
Review
Chemistry, Physical
Chunyu Xu, Zijin Zhao, Kaixuan Yang, Lianbin Niu, Xiaoling Ma, Zhengji Zhou, Xiaoli Zhang, Fujun Zhang
Summary: Solution-processed organic photovoltaics (OPVs) have great potential in next-generation photovoltaic technology due to their advantages of light weight, low cost, easy fabrication, high mechanical flexibility and good semitransparency. However, all-small-molecule OPVs (SMPVs) still lag behind polymer based OPVs in terms of power conversion efficiency. In this review, the development of SMPVs is summarized as small molecular material design and device engineering, with challenges and perspectives discussed for further improvement. The summary on typical SMPV studies provides inspiration for researchers in synthesizing new small molecular materials and fabricating highly efficient SMPVs.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Jinhua Gao, Na Yu, Zhihao Chen, Yanan Wei, Congqi Li, Tianhua Liu, Xiaobin Gu, Jianqi Zhang, Zhixiang Wei, Zheng Tang, Xiaotao Hao, Fujun Zhang, Xin Zhang, Hui Huang
Summary: This study utilized a ternary donor alloy strategy to precisely tune the energy of charge transfer (CT) state in organic solar cells (OSCs), leading to improved efficiency. By adjusting the energy of CT state, energy loss was reduced, hybridization between localized excitation state and CT state was promoted, and optimal morphology was achieved, resulting in a significantly enhanced efficiency.
Article
Nanoscience & Nanotechnology
Xiaoling Ma, Wenjing Xu, Zhongyuan Liu, Sang Young Jeong, Chunyu Xu, Jian Zhang, Han Young Woo, Zhengji Zhou, Fujun Zhang
Summary: In this work, layer-by-layer (LbL) polymer solar cells (PSCs) with the incorporation of a dissociation strengthening layer (DSL) were constructed using wide-bandgap donor D18-Cl and narrow-bandgap nonfullerene acceptor Y6. The efficiency of LbL PSCs was enhanced by introducing the DSL, resulting in a PCE improvement from 17.62% to 18.15%. The DSL incorporation strategy also showed improved performance in D18-Cl/L8-BO- or D18-Cl/N3-based LbL PSCs, indicating its universality in enhancing PCE.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Zijin Zhao, Chunyu Xu, Yao Ma, Xiaoling Ma, Xixiang Zhu, Lianbin Niu, Liang Shen, Zhengji Zhou, Fujun Zhang
Summary: Filter-free narrowband photomultiplication-type planar heterojunction (PHJ) organic photodetectors (PM-PHOPDs) are realized by employing a thick front donor layer and an ultrathin PC71BM layer. The P3HT/PC71BM-based PM-PHOPDs exhibit narrowband response with high external quantum efficiency (EQE). The response peak of PM-PHOPDs can be adjusted by incorporating different OFA layers.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Zhongyuan Liu, Xiaoling Ma, Wenjing Xu, Shuping Zhang, Chunyu Xu, Sang Young Jeong, Han Young Woo, Zhengji Zhou, Fujun Zhang
Summary: The effect of dynamic processes in the layer-by-layer (LbL) active layers on the performance of all-polymer solar cells (APSCs) is studied by comparing conventional and inverted APSCs. The results show that conventional LbL APSCs exhibit higher power conversion efficiency (PCE) due to optimized phase separation and molecular arrangement, while inverted LbL APSCs show lower PCE mainly attributed to insufficient exciton dissociation in the acceptor material.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Mengyun Jiang, Hong-Fu Zhi, Bao Zhang, Chucheng Yang, Asif Mahmood, Miao Zhang, Han Young Woo, Fujun Zhang, Jin-Liang Wang, Qiaoshi An
Summary: In this study, a new acceptor L8-BO was combined with the B1:BO-4Cl system to construct efficient ternary all-small-molecule organic solar cells (ASM-OSCs). Theoretical, morphological, and crystallographic studies showed that L8-BO and BO-4Cl had good compatibility, leading to the formation of an alloy-like state in the ternary blend. The synergy between the two acceptors promoted favorable phase separation and molecular stacking, enhancing charge splitting and extraction and resulting in improved short-circuit current density and fill factor. Furthermore, the alloy-like state of the acceptors and the higher energy level of L8-BO helped reduce voltage loss in the ternary ASM-OSCs compared to binary devices. The optimal ternary ASM-OSCs with 20 wt% L8-BO achieved a top-level efficiency of 17.10%.
ACS ENERGY LETTERS
(2023)
Article
Energy & Fuels
Shuping Zhang, Xiaoling Ma, Lianbin Niu, Sang Young Jeong, Han Young Woo, Zhengji Zhou, Fujun Zhang
Summary: By finely modulating the energy levels and absorption spectra, organic semiconducting materials with fluorine or chlorine substitution are designed for efficient polymer solar cells (PSCs). In this study, two small molecular acceptors with fluorine or chlorine substitution are selected to prepare ternary PSCs with a polymer donor. The optimal ternary PSCs exhibit a high power conversion efficiency of 18.66% by increasing the open-circuit voltage, short-circuit current density, and fill factor. The addition of chlorine substitution enhances the crystallization and intermolecular interaction, leading to improved charge transport and device performance.
Review
Energy & Fuels
Lu Zhang, Zhigang Yao, Hanyu Wang, Jian Zhang, Xiaoling Ma, Fujun Zhang
Summary: Polymer solar cells (APSCs) composed of polymeric donors and acceptors have shown great potential for wearable and flexible stretchable devices due to their mechanical flexibility and good film formation property. The recent progress in efficient APSCs is mainly attributed to the development of functional layer materials and device engineering evolution. This review outlines the key materials and techniques that enable high-performance APSCs, and discusses the challenges and future outlooks in this field.
Article
Physics, Applied
Haolan Zhang, Ming Liu, Xingchao Zhao, Xiaoling Ma, Guangcai Yuan, Junming Li, Fujun Zhang
Summary: Photomultiplication type quasi-planar all-polymer photodetectors (PM-QAPDs) were fabricated using a sequential spin-coating method, and the response range was adjusted by altering the thickness of the donor layer.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Chunyu Xu, Zijin Zhao, Lixuan Kan, Sheng Tao, Xiaoling Ma, Xixiang Zhu, Kai Wang, Jian Zhang, Junming Li, Fujun Zhang
Summary: By optimizing photon harvesting and photogenerated carrier collection, opaque organic photovoltaics with high fill-factor and power conversion efficiency are achieved. Additionally, colorful semitransparent organic photovoltaics are realized by tuning the thickness of Ag and LiF layers.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Energy & Fuels
Zhongyuan Liu, Miao Zhang, Wenjing Xu, Hongyue Tian, Sang Young Jeong, Han Young Woo, Xiaoling Ma, Fujun Zhang
Summary: A series of bulk heterojunction (BHJ) and layer-by-layer (LbL) all-polymer solar cells (APSCs) were prepared with PM6 as donor and PY-DT as acceptor in conventional and inverted configurations. The traditional LbL APSCs exhibited the highest power conversion efficiency (PCE) of 17.24%, attributed to efficient charge transport and exciton utilization with energy transfer from PM6 to PY-DT and self-absorption effect of PM6 playing crucial roles.
Article
Materials Science, Multidisciplinary
Wenjing Xu, Xiong Li, Sang Young Jeong, Jae Hoon Son, Zhengji Zhou, Qiuju Jiang, Han Young Woo, Qinghe Wu, Xixiang Zhu, Xiaoling Ma, Fujun Zhang
Summary: Layer-by-layer polymer solar cells (LbL-PSCs) were prepared with PNTB6-Cl as the donor and Y6 as the acceptor using solvent additives DPE and DFB. The PCE of the optimal LbL-PSCs reached 17.53%, with over 7% enhancement compared to LbL-PSCs without solvent additives. Different solvent additives in the donor and acceptor solutions can optimize the photogenerated exciton distribution and charge transport. LbL-PSCs show better PCEs compared to bulk heterojunction PSCs, indicating their great potential for commercial application.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Polymer Science
Yue Wang, Chunyu Xu, Chong Wang, Yutong Yan, Qianqian Sun, Xiaoling Ma, Fujun Zhang
Summary: The recombination of advantages from two binary-organic photovoltaics (OPVs) into a ternary cell, with ITIC as a photon harvesting reinforcing agent and morphology regulator, leads to over 11.5% improvement in power conversion efficiency. The good compatibility between BTP-4F-12 and ITIC allows for optimizing their relative content to achieve a well balanced three key photovoltaic parameters in ternary-OPVs.
JOURNAL OF POLYMER SCIENCE
(2022)
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
