Article
Materials Science, Multidisciplinary
Jungan Wang, Hongzhuang Ma, Aifei Wang, Zihao Li, Jingjin Dong, You Liu, Song Gao, Suhao Yan, Xianglin Chen, Ya Li, Zichao Wu, Wenxin Xu, Fang Liu, Fangfang Wang, Wei Huang, Tianshi Qin
Summary: We propose an ion-pairing passivating agent that can convert the surface of perovskite solar cells into water-resistant compositions. This agent reduces defect density and improves photovoltage and efficiency. Additionally, it has waterproof features that significantly enhance the stability of the device.
Article
Materials Science, Multidisciplinary
Kaiyu Wang, Feitong Chen, Qing Yao, Jie Zhang, Huiling Zhu, Weiwei Zhang, Xiaoyuan Zhan, Shenglai Wang, Jianxu Ding
Summary: The triple-cation and mixed-halide perovskites FAxMAyCs(1-x-y)PbI(z)Br(3-z) have been identified as the optimal composition for photovoltaic devices due to their exceptional stability and high efficiency. The introduction of MA and Cs improves crystal stability and optoelectronic performance.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Ching-Ho Tien, Wei-Cheng Lin, Lung-Chien Chen
Summary: This study investigates the effects of different additives on the performance of perovskite solar cells. It is found that cesium can stabilize the perovskite phase, while chlorine can increase the size and crystallinity of the perovskite crystals, thereby improving the overall device performance. Additionally, modifying the interface between the hole transport layer and the perovskite layer can further enhance the photovoltaic characteristics of the perovskite solar cells.
Article
Materials Science, Multidisciplinary
Qi-Hua Yang, Han-Qi Wei, Gui-Hua Li, Jun-Ben Huang, Xuan Liu, Ge-Mei Cai
Summary: In recent years, metal halide perovskites, especially lead halide perovskites, have gained significant attention for their excellent properties in various fields. However, the toxicity and poor stability of lead halide perovskites have hindered their application and commercialization. To overcome these issues, researchers have been exploring low-toxic and environmentally friendly lead-free perovskites, such as Cs3Cu2X5 (X = Cl, Br, I), which show great potential as Cu-based perovskites. This review provides a comprehensive overview of Cs3Cu2X5, including their synthesis, doping, encapsulation methods, luminescence mechanisms, and potential applications. The current challenges and future prospects of Cs3Cu2X5 in multi-purpose potential applications are also addressed.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yang Zhou, Simone C. W. van Laar, Daniele Meggiolaro, Luca Gregori, Samuele Martani, Jia-Yong Heng, Kunal Datta, Jesus Jimenez-Lopez, Feng Wang, E. Laine Wong, Isabella Poli, Antonella Treglia, Daniele Cortecchia, Mirko Prato, Libor Kobera, Feng Gao, Ni Zhao, Rene A. J. Janssen, Filippo De Angelis, Annamaria Petrozza
Summary: The bandgap tunability of lead mixed halide perovskites (LMHPs) is crucial for optoelectronic applications. However, the formation of iodide-rich phase under illumination destabilizes the bandgap. This study reveals that the formation of the iodide-rich phase is promoted by the presence of I-2 and the binding strength of Br- within the crystalline unit.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hengshan Wang, Yanfeng Yin, Jiao Xu, Jing Li, Yanan Bao, Meiqi An, Lingzhi Tang, Shengye Jin, Wenming Tian, Yiming Yang
Summary: The dynamic crystal lattice of halide perovskites facilitates the coupled transport of ions and electrons, offering innovative concepts in semiconductor iontronic devices. This study focused on investigating electric field induced ionic transport in CsPbBr3 nanowires and discovered highly anisotropic ionic transport upon poling. The giant switchable photovoltaic effect was identified, along with significant localization of photocarriers near one terminal of the device, attributed to the accumulation of halogen vacancies. The poled device showed a 10-fold increase of photoresponse speed due to enhancement of the local electric field.
Article
Materials Science, Multidisciplinary
Soumya Kundu, Dongyang Zhang, Abdelrahman M. Askar, Erin G. Moloney, Michael M. Adachi, Ayesha Nadeem, Shahram Moradi, Vishal Yeddu, Ahmed L. Abdelhady, Oleksandr Voznyy, Makhsud Saidaminov
Summary: Stabilization of alpha-FAPbI3 single crystals is achieved through Pb-site doping with the heterovalent metal-bismuth (Bi), leading to an extended half-life of the alpha-to-delta phase transition. Density functional theory calculations suggest that Bi doping can improve the photovoltaic performance of Bi-doped alpha-FAPbI3-based solar cells.
ACS MATERIALS LETTERS
(2022)
Article
Chemistry, Physical
Qi Wang, Weijian Tang, Yuting Chen, Wuke Qiu, Yihui Wu, Qiang Peng
Summary: By introducing the aromatic zwitterion SPHI, the crystal growth of bromine-free RbCsFAMA quadruple cation perovskite film can be regulated, resulting in improved photoluminescence lifetime, reduced non-radiative recombination, and minimized open-circuit voltage loss, leading to high-performance perovskite solar cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Sarvani Jowhar Khanam, Srinivasa Rao Konda, Ravi Ketavath, Wufeng Fu, Wei Li, Banavoth Murali
Summary: Mixed-halide perovskite materials (MHSCs) are promising for photonics applications due to their tunable bandgap properties and defect tolerance characteristics. However, their commercialization is hindered by external factors such as humidity and oxygen. In this study, the use of nitrogen-based additives improved the nanolevel crystallinity and affected the morphological and optical properties of MHSCs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Dongguen Shin, Fengshuo Zu, Ayala Cohen, Yeonjin Yi, Leeor Kronik, Norbert Koch
Summary: The electronic properties of metal halide perovskites (MHPs) remain under debate, with reported Fermi level positions varying and raising questions about intrinsic and extrinsic defects as dopants. This study demonstrates that MHPs behave as intrinsic semiconductors in the absence of oxygen, but oxygen diffusion leads to pronounced p-doping and positions the Fermi level approximately 0.55 eV above the valence band maximum. The key doping mechanism is suggested to be molecular oxygen substitution of iodine vacancies, supported by density functional theory calculations.
ADVANCED MATERIALS
(2021)
Article
Optics
Nan Ding, Long Shao, Tianyu Xie, Gencai Pan, Donglei Zhou, Xue Bai, Siyu Lu, Junhua Hu, Ji Zhou, Wen Xu, Hongwei Song
Summary: In this study, highly sensitive, stable, and fast-response lead-free double halide perovskite photodetectors (PDs) are successfully achieved through doping optimization and integration with silver nanoparticles (NPs). The doping optimization of Na+/Ce3+ improves the crystallization quality and stability of Cs2AgBiBr6, resulting in reduced defect density and improved charge mobility. Integration with silver NPs further enhances charge extraction and transport efficiency. The developed PDs exhibit high detectivity, outstanding stability, and fast-response time.
LASER & PHOTONICS REVIEWS
(2022)
Article
Thermodynamics
Bin Wang, Alexandra Navrotsky
Summary: Inorganic cesium lead halide perovskites, particularly CsPbX3, have attracted significant interest for photovoltaic applications, despite facing potential issues with chemical and thermodynamic instabilities. Calorimetric studies revealed decreasing thermodynamic stability in the order CsPbCl3, CsPbBr3, and CsPbI3, with CsPbI3 being only marginally stable from a thermodynamic perspective. The variation in stability follows the Goldschmidt tolerance factor, and perovskites are shown to be entropy-stabilized high temperature phases relative to low temperature polymorphs, with phase transitions reflecting the thermodynamic trends.
THERMOCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Marieh B. Al-Handawi, Ghada Dushaq, Patrick Commins, Durga Prasad Karothu, Mahmoud Rasras, Luca Catalano, Pance Naumov
Summary: This study reports the autonomous self-healing capability of centimeter-size single crystals of methylammonium lead(II) iodide (MAPbI(3)) at ambient temperature, with remarkable recovery of their optoelectronic properties. This discovery overcomes the challenges of chemical stability and mechanical robustness, providing a new strategy for the development of durable and stable optoelectronic devices based on single crystals of hybrid perovskites.
ADVANCED MATERIALS
(2022)
Review
Biochemistry & Molecular Biology
Fatemeh Heidari Gourji, Dhayalan Velauthapillai
Summary: Despite the flexibility in optoelectronic applications, Pb-based perovskites face challenges of instability and toxicity. The research community is exploring stable non-toxic perovskite materials, with a focus on Cs-based Pb-free halide double perovskites. Current research includes both theoretical and experimental studies, along with the impact of metal dopants on their performance in photovoltaics.
Article
Chemistry, Inorganic & Nuclear
Qiang Huang, Changqing Tian, Junan Lai, Fei Qi, Nan Zhang, Jiaxin Liu, Zhiyu Liang, Daofu Wu, Xiaosheng Tang
Summary: This article introduces a new method for the photocatalytic reduction of CO2 based on nonleaded and high-stability halide perovskites. The prepared Cs2TeBr6 microcrystals exhibit stronger photocatalytic ability, efficiently converting carbon dioxide into CO and CH4.
INORGANIC CHEMISTRY
(2022)
Review
Chemistry, Physical
Shaomin Yang, Yuwei Duan, Zhike Liu, Shengzhong (Frank) Liu
Summary: All-inorganic CsPbX3 perovskites have attracted significant attention in recent years due to their excellent optoelectronic properties and wide range of applications. This review provides a brief introduction to the fundamental properties of CsPbX3 perovskites and summarizes the recent progress in crystallization modulation strategies for high-quality CsPbX3 films. The potential methods for improving the efficiency of inorganic PSCs are also discussed, offering insights into the future development prospects.
ADVANCED ENERGY MATERIALS
(2023)
Article
Polymer Science
Rui Zhao, Yuechen Li, Zicheng Ding, Ziang Wu, Han Young Woo, Kui Zhao, Xiaochen Wang, Shengzhong Frank Liu, Yongfang Li
Summary: Fabrication of high-efficiency organic solar cells using nonhalogen green solvents is desired, but the morphology control of the active layer remains challenging. In this study, a two-step heating strategy is proposed to optimize the morphology of the active layer based on a low-cost polymer donor and a small molecule acceptor. This strategy improves the charge generation, transport, and collection efficiency, resulting in a significantly higher device efficiency compared to nonoptimal conditions.
Review
Chemistry, Physical
Jinbo Pang, Songang Peng, Chongyang Hou, Xiao Wang, Ting Wang, Yu Cao, Weijia Zhou, Ding Sun, Kai Wang, Mark H. Ruemmeli, Gianaurelio Cuniberti, Hong Liu
Summary: In this review, the applications of MXene in sensors and actuators are discussed. MXene-based films, membranes, and composites are used to simulate the five primary human senses and stimulate muscles. MXene is utilized in image sensors, gas sensors, chemical biosensors, acoustic devices, and tactile sensors for electronic skin, as well as in MXene-based actuators. The future opportunities for MXene research in artificial intelligence and humanoid robots are also presented.
Article
Chemistry, Multidisciplinary
Yi-Han Wang, Yu Qin, Shen Tang, Qing-Hu Teng, Meng-Meng Zhu, Song Peng, Kai Wang, Fu-Pei Liang
Summary: Two novel polynuclear lanthanide clusters with asymmetric metallogrid and double-layered cage topologies have been synthesized. Magnetic measurements reveal slow magnetic relaxation behavior in both compounds.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jing Li, Chenyang Zhang, Xiuzun Zhong, Wanyuan Deng, Hanlin Hu, Kai Wang
Summary: This study investigates the design of two new small-molecule donors with different end groups and their successful incorporation into the organic solar cell system, which enhances charge collection and transportation and improves the efficiency of the cells.
Article
Chemistry, Multidisciplinary
Zhiteng Wang, Qingwen Tian, Hao Zhang, Huidong Xie, Yachao Du, Lei Liu, Xiaolong Feng, Adel Najar, Xiaodong Ren, Shengzhong (Frank) Liu
Summary: Research has found that halide-related surface defects on inorganic halide perovskite can lead to charge recombination and affect the long-term stability of perovskite solar cells. Using density functional theory calculation, it has been verified that iodine interstitials (I-i) have a low formation energy and are easily formed on the surface of all-inorganic perovskite. A specific passivator called 2,6-diaminopyridine (2,6-DAPy) has been screened, which successfully eliminates iodine interstitials, dissociative iodine molecules, and passivates iodine vacancies. This passivation process improves the power-conversion efficiency (PCE) and environmental stability of the perovskite solar cells.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Manni Chen, Zhipeng Zhang, Bin Wen, Runze Zhan, Kai Wang, Shaozhi Deng, Jiangsheng Xie, Jun Chen
Summary: This study presents the use of Ga2O3 compact layer to form a heterojunction structure with FAPbI3 for perovskite-based X-ray detectors. The FAPbI3/Ga2O3 detector exhibits significantly reduced dark current and increased photo-to-dark current ratio compared to the bare FAPbI3 detector. It also achieves a lower detection limit and shorter response time. Furthermore, the FAPbI3/Ga2O3 device demonstrates better repeatability due to the suppression of ion migration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Xinhe Wu, Haiqin Ma, Kai Wang, Juan Wang, Guohong Wang, Huogen Yu
Summary: An innovative and one-step sodium acetate (CH3COONa)-mediated synthesis strategy has been designed to synthesize a high-yield and crystalline g-C3N4 photocatalyst, aiming to avoid the drawbacks of currently reported molten salt-assisted strategy. The CH3COONa can effectively prevent the sublimation of DCDA and promote the transformation of DCDA into g-C3N4 with a high yield. The resulting g-C3N4 exhibits significantly enhanced H2-evolution rate.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Organic
Qing-Hu Teng, Feng-Lai Lu, Kai Wang, Li-Ya Zhou, Dian-Peng Li
Summary: A photocatalytic chemodivergent reaction was proposed to selectively form C-S and C-N bonds in a controlled manner. The reaction medium, either neutral or acidic, plays a critical role in dictating the formation of 2-amino-1,3,4-thiadiazoles and 1,2,4-triazole-3-thiones from isothiocyanates and hydrazones. This protocol offers a practical approach to achieve chemoselectivity under mild and metal-free conditions.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Yali Zhou, Bin Liu, Qi Luo, Heqing Yang, Shengzhong Liu
Summary: The discovery of a new physical phenomenon will lead to the exploration of a new research area. Here, we demonstrate a novel phenomenon called the thermovoltaic effect on a nonpolar ZnO (1010) surface, which is distinct from the pyroelectric and thermoelectric effects. The thermovoltaic effect does not require temperature variation or gradient. By applying thermal radiation from a rod-shaped heater (9.0 W), the ZnO thermovoltaic device produces a short-circuit current of 0.64 mu A and an open-circuit voltage of 0.88 mV. This effect is attributed to the spontaneous electric field (Es) along the polar [0001] direction on the ZnO (1010) surface, which facilitates the directional movement of thermally generated electrons and enables the observation of the thermovoltaic effect. This discovery opens up possibilities for the study of thermovoltaic cells and provides evidence for the general polar structure theory.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Yang Yang, Lu Liu, Jianxun Li, Shuai Zhao, Zhen Chang, Le Wang, Dongqi Yu, Kai Wang, Shengzhong (Frank) Liu
Summary: In this work, we demonstrate an ambient aging process that appears to further improve the performance of wide-bandgap perovskite solar cells. The aging process induces secondary recrystallization and reduces defect density through air passivation and halogen redistribution. This leads to suppressed nonradiative recombination and prolonged carrier lifetime. The champion wide-bandgap perovskite solar cell achieved a power-conversion efficiency of 20.12% and a high open-circuit voltage of 1.27 V, making it one of the highest-performing wide-bandgap solar cells reported. This work reveals the impact of the air aging process on perovskite film properties and demonstrates a scalable post-treatment strategy for producing state-of-the-art semiconducting films.
Review
Materials Science, Multidisciplinary
Yabin Ma, Jinghao Ge, Alex K. -Y. Jen, Jiaxue You, Shengzhong (Frank) Liu
Summary: Perovskite solar cells (PSCs) with excellent photoelectric properties have gained significant attention. However, the manufacturing process of PSCs introduces a large number of defects, which negatively impact their performance. Polymers have emerged as promising additives due to their adjustable structures, multiple functional groups, stability, and low cost, further promoting the commercialization of PSC technology. However, the lack of systematic studies and effective guidelines has hindered the application of polymers in PSCs. This review summarizes the various roles of polymers in PSCs, including crystallization regulation, enhancing the mechanical stability of flexible PSCs, and serving as undoped hole transport materials. It also proposes the use of machine learning to design and select polymers for PSCs. Promising guidelines and recommendations for the commercialization of PSCs are provided.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yanrui Zhang, Lixia Ren, Peng Zhai, Jingjing Xin, Jiarong Wu, Qi Zhang, Xin Chen, Kui Zhao, Lu Zhang, Shengzhong (Frank) Liu
Summary: This study investigates the fabrication process of perovskite using water instead of toxic organic solvents. The high surface tension of water is overcome by designing a long-alkyl chain anionic surfactant, potassium oleate (PO), which reduces the surface tension and enables the production of high-quality, pinhole-free perovskite films. The use of PO also improves the formation kinetics of perovskite, resulting in a high power conversion efficiency (PCE) of 24.14% for PSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Zhuo Xu, Weidong Luo, Songyan Guo, Shengzhong Frank Liu
Summary: This work reveals the crucial role of spacer ligands in metal-2D perovskite junctions, which can significantly affect the contact properties. Ligands with different sizes and functional groups have been found to strongly influence the interface binding energy, Schottky barrier height, and tunneling property. Small-size ligands can effectively enhance the interface coupling and perturb the perovskite electronic properties, resulting in a high tunneling probability.
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, Multidisciplinary
Abu Talha Aqueel Ahmed, Sankar Sekar, Shubhangi S. Khadtare, Nurul Taufiqu Rochman, Bathula Chinna, Abu Saad Ansari
Summary: In this study, MnCo2S4 nanosheet catalyst was successfully synthesized and found to exhibit superior performance in hydrogen evolution. Compared to MnCo2S4, MnCo2S4 showed low overpotentials, moderate Tafel slope, and excellent sustainability. The outstanding performance can be attributed to the increased number of electrochemically active sites and enhanced electronic conductivity on the catalyst surface.
Article
Chemistry, Multidisciplinary
Victor V. Maltsev, Elena A. Volkova, Elizaveta V. Koporulina, Diana D. Mitina, Vladimir L. Kosorukov, Anna I. Jiliaeva, Daniil A. Naprasnikov, Konstantin N. Gorbachenya, Viktor E. Kisel
Summary: The phase relationships, crystal properties and luminescence kinetics of two complex systems were studied, including unit cell parameters, segregation coefficients of impurities, and lifetimes of energy levels.
Article
Chemistry, Multidisciplinary
Xiaoman Zhang, Wangwang Xu, W. J. Meng, Andrew C. Meng
Summary: This study successfully grew high-quality single crystal AlScN nanowires through ultra-high vacuum reactive sputtering technique and characterized their structure and properties. The nanowires exhibit significantly reduced mosaic spread and predominantly single ferroelectric domains, as well as a high piezoelectric constant.
Article
Chemistry, Multidisciplinary
Tom E. de Vries, Elias Vlieg, Rene de Gelder
Summary: Networks are important for describing relationships between people, roads between cities, reactions between chemicals, and other interactions. Bipartiteness, dividing the network into two groups, can facilitate the study of the network's structure. We have developed an algorithm that can find a near-optimal bipartisation within a reasonable time frame and used it to uncover the hidden structure of the CSD cocrystal network.
Article
Chemistry, Multidisciplinary
Chuchu Han, Jing Yang, Xin Zhang, Aisen Li, Jiang Peng
Summary: An elastic crystal based on a photo-reactive acylhydrazone derivative is reported, which exhibits reversible bending behavior under UV irradiation and heating. The crystal undergoes reversible E<->Z isomerization under light and heating conditions. The crystal demonstrates excellent elastic properties and the bending can be controlled to control the output direction of red light.
Article
Chemistry, Multidisciplinary
Lingfeng Zhang, Yu Wang, Yefeng Wang, Shuai Liu, Na Zhang, Mingmin Yang, Haixia Ma, Zhaoqi Guo
Summary: This study designs and synthesizes a series of high-energy salts compounds without heavy metal ions and azide groups. The molecular structures and stability of the compounds are confirmed through single-crystal X-ray diffraction and intermolecular interaction analysis. Furthermore, the thermal stability, energetic properties, and electrical initiation properties of the compounds are investigated, suggesting their potential as primary explosives.