Article
Chemistry, Multidisciplinary
Tamasgen Fikadu Yadeta, Kuo-Wei Huang, Toyoko Imae, Yung-Liang Tung
Summary: The high performance of perovskite solar cells was achieved by using an electron transport layer (ETL) and hole transport layer. A film ETL (mesoporous (meso)-TiO2/carbon dot) was found to enhance the efficiency of the perovskite solar cells. Coating carbon dot on a meso-TiO2 ETL was shown to reduce pin-holes in the perovskite film layer, resulting in a 3% increase in the average power conversion efficiency (PCE). The absorption properties of the meso-TiO2/carbon dot ETL were superior, leading to higher power conversion efficiency compared to meso-TiO2 ETL. The deposition of carbon dot on meso-TiO2 ETL reduced carrier recombination and perovskite film cracks, thereby improving device performance.
Review
Chemistry, Physical
N. Suresh Kumar, K. Chandra Babu Naidu
Summary: Perovskite solar cells have garnered much attention in recent years due to their high power conversion efficiency, simple fabrication process, lightweight nature, and stability. Research has focused on the crystallinity, morphology, synthesis techniques, and potential commercialization feasibility of different layers in perovskite solar cells.
JOURNAL OF MATERIOMICS
(2021)
Article
Chemistry, Physical
Bin Rong, Yuelin Wei, Xia Chen, Yuying Ding, Yibin Chen, Haining Liu, Yunfang Huang, Leqing Fan, Jihuai Wu
Summary: In this study, Na-doped TiO2 was prepared using a metal-organic framework as a precursor, and was then inserted into the interfaces between layers in perovskite solar cells. The Na-doped TiO2 decorated devices exhibited higher quality perovskite layers, lower trap state density, higher conductivity, and better electron extraction and transmission. The power conversion efficiency of the solar cells increased from 17.21% to 20.49%. This study presents a novel and facile method to enhance the performance of perovskite solar cells.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Arzu Ocebe, Ismail Cihan Kaya
Summary: Cs2AgBiBr6 films were synthesized by the gas-quenching process and employed as light-absorbing layer in perovskite solar cells. The addition of BMIMPF6 ionic liquid enhanced the crystallinity of perovskite and improved the power conversion efficiency of the cells.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Xiaolin Sun, Lu Li, Shanshan Shen, Fang Wang
Summary: We demonstrated a bilayer electron transport layer (ETL) architecture for high-performance perovskite solar cells (PSCs), with a chemical-bath-deposition-based titanium dioxide (TiO2) thin layer and a spin-coating-based tin oxide (SnO2) thin layer. The bilayer ETL not only produces larger grain size of PSCs, but also provides higher current density and reduced hysteresis. Compared to mono-ETL PCSs with an efficiency of 16.16%, the bilayer ETL device features a higher efficiency of 17.64%.
Article
Energy & Fuels
Ubaid Khan, Tahseen Iqbal, Mehreen Khan, Rongguang Wu
Summary: By introducing a double electron transport layer (DETL), the energy loss in perovskite solar cells was effectively mitigated, resulting in an improved energy conversion efficiency of 15.22%. The best performance was achieved with an optimized thickness of ZnO layer reaching 210 nm.
Article
Materials Science, Multidisciplinary
Abdul Sami, Arsalan Ansari, Muhammad Dawood Idrees, Muhammad Musharraf Alam, Junaid Imtiaz
Summary: The perovskite inorganic-organic solar cells utilize a sandwich structure consisting of mesostructured TiO2, CH3NH3PbI3, and Spiro-OMeTAD, with the crystallinity, structural morphology, and thickness of the TiO2 layer playing a crucial role in improving device performance. The randomly distributed one dimensional (1D) TiO2 nanowires (TNWs) provide better light trapping and active filling compared to bulk TiO2, leading to high open circuit voltage and conversion efficiency in solid-state photovoltaic devices. Finite-difference time-domain (FDTD) analysis shows improved light trapping capabilities at the interface of TNWs/CH3NH3PbI3 compared to bulk TiO2.
Review
Materials Science, Multidisciplinary
Ying Chen, Man Zhang, Fuqiang Li, Zhenyuan Yang
Summary: The power conversion efficiency (PCE) of perovskite solar cells (PSCs) has shown effective performance upgrades, with narrowing gap compared to commercial silicon cells. However, stability, cost, and large-scale production still lag behind. This review summarizes recent research on the functional layers of PSCs, including electron transport layer, perovskite layer, hole transport layer, and electrode. It discusses the need for doping and bi-layer ETL for enhancing the performance of common ETL materials, and the challenges of large-scale and low-cost production of perovskite layers. The expensive and instability issues of Spiro-OMeTAD and electrode materials are also addressed, along with future development direction.
Article
Chemistry, Multidisciplinary
Baoning Wang, Na Li, Lin Yang, Chunxiang Dall'Agnese, Ajay Kumar Jena, Shin-ichi Sasaki, Tsutomu Miyasaka, Hitoshi Tamiaki, Xiao-Feng Wang
Summary: In this study, a carboxy-chlorophyll derivative (C-Chl) was introduced as a sensitizer to enhance the performance of Cs2AgBiBr6-based perovskite solar cells. The optimized device achieved a significantly improved power conversion efficiency (PCE) exceeding 3% for the first time, with enhanced short-circuit current density and improved stability. The introduction of C-Chl was found to reduce defects, accelerate electron extraction, and suppress charge recombination at the interface, leading to the enhanced overall performance of the solar cells.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Qixin Zhuang, Huaxin Wang, Cong Zhang, Cheng Gong, Haiyun Li, Jiangzhao Chen, Zhigang Zang
Summary: In this study, an ion diffusion-induced double layer doping strategy was reported to improve the electric properties and stability of PSCs, leading to a higher power conversion efficiency of 21.31% and improved ambient stability compared to control devices. This work demonstrates a simple and effective method to advance the development of perovskite photovoltaics.
Article
Chemistry, Physical
Akbar Ali Qureshi, Hafiz Muhammad Asif Javed, Sofia Javed, Ayesha Bashir, Muhammad Usman, Aftab Akram, M. Irfan Ahmad, Usman Ali, Muhammad Shahid, Muhammad Rizwan, Sabir Ali Raza
Summary: The use of zirconium-doped TiO2 nanoparticles as an ETL in PSC significantly improves the power conversion efficiency. Additionally, the newly synthesized Zr-TiO2 nanoparticles also show good performance in photocatalytic activity.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Chia-Hsun Hsu, Ka-Te Chen, Ling-Yan Lin, Wan-Yu Wu, Lu-Sheng Liang, Peng Gao, Yu Qiu, Xiao-Ying Zhang, Pao-Hsun Huang, Shui-Yang Lien, Wen-Zhang Zhu
Summary: Tantalum-doped titanium oxide thin films grown by plasma enhanced atomic layer deposition show reduced crystallinity, lower resistivity, and improved performance as electron transport layer in perovskite solar cells compared to undoped films. The presence of tantalum introduces oxygen vacancies defects and shifts the valance band position, beneficial for band alignment engineering in solar cell applications.
Article
Chemistry, Multidisciplinary
Dongliang Bai, Dexu Zheng, Shaoan Yang, Fengyang Yu, Xuejie Zhu, Lei Peng, Likun Wang, Jishuang Liu, Dong Yang, Shengzhong (Frank) Liu
Summary: The defects formed by halide ion escape and the wettability of the perovskite absorber are important factors limiting the performance of perovskite solar cells (PSCs). In this study, a series of ionic organic modulators containing halide anions were designed to prevent defect formation and improve the surface tension of the perovskite absorber. It was found that the modulator containing Br anions was the most effective in reducing charge recombination and promoting carrier transfer. Additionally, this modulator improved the hydrophobicity of the perovskite surface. As a result, the efficiency of PSCs using the Br-containing modulator increased to 23.32% from the control device's efficiency of 21.08%. The unencapsulated PSCs with the modulator also showed excellent stability, retaining 75.42% of their initial efficiency after 28 days of storage in air with about 35% humidity, compared to the control device's 44.49% retention. The research demonstrates the importance of halide ions in defect prevention and surface tension improvement of perovskite absorber, and highlights the potential of ionic organic modulators for enhancing PSC performance.
Article
Chemistry, Physical
Fahimeh Zamanpour, Fatemeh Behrouznejad, Ehsan Ghavaminia, Rouhollah Khosroshahi, Yiqiang Zhan, Nima Taghavinia
Summary: In order to push PSCs into large-scale production, it is crucial to improve efficiency and stability, reduce fabrication cost, and increase manufacturing speed. This research explored using a fast light-curing procedure to replace the conventional heating and sintering process, showing effective sintering and improved efficiency, while also reducing hysteresis.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Tianyu Gao, Haojie Sui, Jingwei Zhu, Haiyan Chen, Qunwei Tang, Benlin He
Summary: Nd-doped TiO2 is used as an electron-transport layer (ETL) in perovskite solar cells (PSCs) to enhance the power conversion efficiency (PCE). The doping effect of Nd reduces trap states and improves electron mobility and conductivity of TiO2, leading to a well-matched energy level with the perovskite layer. The CsPbBr3 PSCs based on Nd-TiO2 ETL achieve a champion PCE of 10.06% with improved charge extraction and reduced charge recombination, surpassing the 6.57% efficiency of the reference cell. Moreover, the unencapsulated device exhibits enhanced stability with over 90% and 80% retention of the original efficiency after aging in high humidity and under intense illumination, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Correction
Biochemistry & Molecular Biology
Dongsheng Guan, Yingxia Li, Yinglin Cui, Yanke Guo, Ning Dong, Ge Li, Yun Dai, Liang Ji
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Multidisciplinary
Xinyue Wang, Yu Wang, Xiahan Sang, Wanzhen Zheng, Shihan Zhang, Ling Shuai, Bin Yang, Zhongjian Li, Jianmeng Chen, Lecheng Lei, Nadia Mohd Adli, Michael K. H. Leung, Ming Qiu, Gang Wu, Yang Hou
Summary: An axial traction strategy was developed to optimize the electronic structure of the M-N-4 moiety, leading to atomically dispersed nickel sites coordinated with four nitrogen atoms and one axial oxygen atom embedded within the carbon matrix (Ni-N-4-O/C). This Ni-N-4-O/C electrocatalyst exhibited excellent CO2RR performance with a high CO Faradic efficiency close to 100% at -0.9 V, maintaining the CO FE above 90% in a wide potential window. The superior CO2RR activity is attributed to the axial traction effect induced by the Ni-N-4-O active moiety.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Wei Zhang, Chuqiang Huang, Jiexin Zhu, Qiancheng Zhou, Ruohan Yu, Yali Wang, Pengfei An, Jing Zhang, Ming Qiu, Liang Zhou, Liqiang Mai, Zhiguo Yi, Ying Yu
Summary: The study demonstrates that the defect-containing metal-organic framework can accelerate the electrochemical CO2 reduction reaction. By investigating the dynamic behavior of Cu-CPW, it is found to act as an active site in the deep CO2 reduction reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Environmental
Jingyi Zhang, Xinyou Ke, Yu Gu, Fenfen Wang, Duanyang Zheng, Kang Shen, Chris Yuan
Summary: All-solid-state lithium-ion batteries (ASSLIBs) have attracted attention due to their higher safety, energy density, and operating temperature range. However, their manufacturing process is energy-intensive with significant environmental impacts compared to conventional lithium-ion batteries (LIBs). It is crucial to reduce energy consumption, improve energy efficiency, and overcome technological barriers for the sustainable development of ASSLIBs.
INTERNATIONAL JOURNAL OF LIFE CYCLE ASSESSMENT
(2022)
Review
Chemistry, Physical
Jofrey J. Masana, Bowen Peng, Zeyu Shuai, Ming Qiu, Ying Yu
Summary: This study investigates the impact of halide ions on copper electrocatalysts in electrochemical reduction of carbon dioxide, highlighting the significance of understanding halide-modified copper catalysts in designing efficient electrocatalysts for this process.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Review
Materials Science, Multidisciplinary
Fenfen Wang, Xinyou Ke, Kang Shen, Lei Zhu, Chris Yuan
Summary: This review discusses recent research and development on thermally stable separators for lithium-ion batteries, including surface modified polyolefin separators, novel polymer separators, inorganic structured separators, and functional smart separators. Different techniques, processes, and materials are summarized for improving the safety of lithium-ion batteries through these separators.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Physical
Sijun Wang, Ze Yang, Botan Chen, Hang Zhou, Shuangfeng Wan, Lingzi Hu, Ming Qiu, Long Qie, Ying Yu
Summary: In this study, an organic-inorganic dual protection layer was built to address the issues of zinc dendrite growth and side reactions in AZIBs, resulting in improved cycling stability and lifespan of the batteries. This work paves the way for future development of AZIBs.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Fan He, Yingjie Zhao, Xiaoxuan Yang, Sixing Zheng, Bin Yang, Zhongjian Li, Yongbo Kuang, Qinghua Zhang, Lecheng Lei, Ming Qiu, Liming Dai, Yang Hou
Summary: A bifunctional microreactor catalyst (CoBDC FcCA) composed of two species of Co active sites and ligand FcCA has been developed for efficient OER performance and accelerated reaction kinetics, enabling solar-driven oxygen production from water splitting.
Article
Multidisciplinary Sciences
Luo Yu, Jiayong Xiao, Chuqiang Huang, Jianqing Zhou, Ming Qiu, Ying Yu, Zhifeng Ren, Ching-Wu Chu, Jimmy C. Yu
Summary: Seawater electrolysis is a sustainable hydrogen production technology, but it is hindered by a lack of robust oxygen evolution reaction (OER) electrocatalysts. This study presents a multimetallic catalyst that exhibits high activity and durability in seawater electrolysis.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Green & Sustainable Science & Technology
Jingyi Zhang, Nathan Chang, Cara Fagerholm, Ming Qiu, Ling Shuai, Renate Egan, Chris Yuan
Summary: Perovskite solar cells have the potential to be a future photovoltaic technology, but there are barriers to large-scale application. Thorough sustainability assessment is necessary to investigate the pathway for development.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Cell Biology
Xu Zhao, Dongge Qiao, Dongsheng Guan, Kun Wang, Yinglin Cui
Summary: This study found that Chrysophanol (CHR) prevented apoptosis, endoplasmic reticulum stress, and oxidative stress after intracerebral hemorrhage (ICH) by regulating the miR-320-5p/Wnt3a/beta-catenin pathway. This suggests that CHR could be a potential treatment for brain damage following ICH.
OXIDATIVE MEDICINE AND CELLULAR LONGEVITY
(2022)
Article
Engineering, Electrical & Electronic
Kang Shen, Xinyou Ke, Fan Yang, Weibo Wang, Cheng Zhang, Chris Yuan
Summary: This study explores the energy consumption, efficiency improvement, and greenhouse gas emissions of a mid-size autonomous EV driven by in-wheel motors. The results show that an IWM-driven AEV can save energy during slope driving and reduce greenhouse gas emissions.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2023)
Article
Engineering, Industrial
Kang Shen, Chris Yuan, Michael Hauschild
Summary: This study presents a process-based life cycle assessment model to analyze the environmental impacts of direct recycling for closed-loop production of lithium ion batteries. The results show that direct recycling can reduce environmental impacts by up to 54% compared to conventional open-loop battery manufacturing.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2023)
Article
Agriculture, Multidisciplinary
Peibo Liang, Jingmin Li, Wei Chen, Jianyang Li, Qing Yang, Jianjun Zhang
Summary: To increase the use of natural bioresources in drug discovery and development, researchers studied N-acetyl-glucosamine (GlcNAc) derivatives of chitin as green pesticides. They synthesized C-glycoside naphthalimides using GlcNAc and found that compound 10l showed high inhibitory activity against OfHex1. The synthesized compounds also inhibited the molting process in Ostrinia furnacalis and showed larvicidal activity against Plutella xylostella without significant toxicity to Trichogramma ostriniae and rats.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Kexin Wang, Yali Wang, Bin Yang, Zhongjian Li, Xuetao Qin, Qinghua Zhang, Lecheng Lei, Ming Qiu, Gang Wu, Yang Hou
Summary: Designing acid-stable oxygen evolution reaction (OER) electrocatalysts with low noble-metal content is crucial for green hydrogen generation. In this study, a rutile-structured ruthenium-manganese solid solution oxide with oxygen vacancies (Mn0.73Ru0.27O2-delta) was developed using an electron-feeding modulation strategy. The catalyst exhibited optimal electronic structure and enhanced electrical conductivity, leading to low overpotential and improved OER kinetics. The incorporation of Mn components and O vacancies modulated the adsorption and desorption energy barriers, improving the overall OER kinetics.
ENERGY & ENVIRONMENTAL 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)
