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Your search keyword '"Wong, Kam Sing"' showing total 16 results
Start Over Author "Wong, Kam Sing" Journal advanced energy materials
16 results on '"Wong, Kam Sing"'

1. Tailoring Cyano Substitutions on Quinoxaline‐based Small‐Molecule Acceptors Enabling Enhanced Molecular Packing for High‐Performance Organic Solar Cells

Author

Chen, Li, primary, Zhao, Chaoyue, additional, Yu, Han, additional, Sergeev, Aleksandr, additional, Zhu, Liangxiang, additional, Ding, Kan, additional, Fu, Yuang, additional, Ng, Ho Ming, additional, Kwok, Chung Hang, additional, Zou, Xinhui, additional, Yi, Jicheng, additional, Lu, Xinhui, additional, Wong, Kam Sing, additional, Ade, Harald, additional, Zhang, Guangye, additional, and Yan, He, additional

Published
2024
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2. Manipulating the Charge Carriers Through Functionally Bridged Components Advances Low‐Cost Organic Solar Cells with Green Solvent Processing

Author

Dela Peña, Top Archie, primary, Ma, Ruijie, additional, Luo, Yongmin, additional, Xing, Zengshan, additional, Wei, Qi, additional, Hai, Yulong, additional, Li, Yao, additional, Garcia, Sheena Anne, additional, Yeung, King Lun, additional, Jia, Tao, additional, Wong, Kam Sing, additional, Yan, He, additional, Li, Gang, additional, Li, Mingjie, additional, and Wu, Jiaying, additional

Published
2023
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3. Manipulating the Charge Carriers Through Functionally Bridged Components Advances Low‐Cost Organic Solar Cells with Green Solvent Processing.

Author

Dela Peña, Top Archie, Ma, Ruijie, Luo, Yongmin, Xing, Zengshan, Wei, Qi, Hai, Yulong, Li, Yao, Garcia, Sheena Anne, Yeung, King Lun, Jia, Tao, Wong, Kam Sing, Yan, He, Li, Gang, Li, Mingjie, and Wu, Jiaying

Subjects
SOLAR cells, CHARGE carriers, THERMODYNAMICS, MOLECULAR structure, ELECTROPHILES, DELAYED fluorescence, OPEN-circuit voltage, PHOTOVOLTAIC power systems
Abstract

Organic solar cell (OSC) development continues to demonstrate impressive device efficiency improvements. However, the materials synthetic simplicity essential to industrialization remains seriously lacking attention, imparting inferior performance records in low‐cost devices. Hence, low bandgap and completely non‐fused electron acceptors (CNFEAs) having simple molecular structures are investigated herein. In contrast to typically explored fused‐ring acceptors with smaller backbone conformational variations, minimizing the interface recombination sites through a greater extent of localized domains is identified as more critical in CNFEAs, leading to remarkable fill factors (FFs) approaching 75%, among the highest currently realized for low‐cost systems. However, this comes with diminishing charge generation efficiency. The general ternary blend optimization strategy modifying the morphology of host components is limited in preserving such remarkably high FFs. To suppress the trade‐off while keeping notable FFs, a new perspective of constructing functionally bridged components based on optical, electronic, and thermodynamic properties is introduced here. Specifically, charge generation is unrestrained from the host acceptor localized domains through the introduction of a "bridge" component while also taking advantage of the configuration to channel polarons toward the efficient transport moieties of the host components. Accordingly, this work incubates understanding‐guided optimizations toward the advancement of more practical devices. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Side‐Chain Engineering on Y‐Series Acceptors with Chlorinated End Groups Enables High‐Performance Organic Solar Cells

Author

Chen, Yuzhong, primary, Ma, Ruijie, additional, Liu, Tao, additional, Xiao, Yiqun, additional, Kim, Ha Kyung, additional, Zhang, Jianquan, additional, Ma, Chao, additional, Sun, Huiliang, additional, Bai, Fujin, additional, Guo, Xugang, additional, Wong, Kam Sing, additional, Lu, Xinhui, additional, and Yan, He, additional

Published
2021
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6. Lead Halide Perovskites: Uncovering the Electron‐Phonon Interplay and Dynamical Energy‐Dissipation Mechanisms of Hot Carriers in Hybrid Lead Halide Perovskites (Adv. Energy Mater. 9/2021)

Author

Chan, Christopher C. S., primary, Fan, Kezhou, additional, Wang, Han, additional, Huang, Zhanfeng, additional, Novko, Dino, additional, Yan, Keyou, additional, Xu, Jianbin, additional, Choy, Wallace C. H., additional, Lončarić, Ivor, additional, and Wong, Kam Sing, additional

Published
2021
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8. Alkyl Chain Regiochemistry of Benzotriazole‐Based Donor Polymers Influencing Morphology and Performances of Non‐Fullerene Organic Solar Cells

Author

Chen, Shangshang, primary, Zhang, Lin, additional, Ma, Chao, additional, Meng, Dong, additional, Zhang, Jianquan, additional, Zhang, Guangye, additional, Li, Zhengke, additional, Chow, Philip C. Y., additional, Ma, Wei, additional, Wang, Zhaohui, additional, Wong, Kam Sing, additional, Ade, Harald, additional, and Yan, He, additional

Published
2018
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9. Perovskite Solar Cells: Large-Grain Formamidinium PbI3- x Br x for High-Performance Perovskite Solar Cells via Intermediate Halide Exchange (Adv. Energy Mater. 12/2017)

Author

Long, Mingzhu, primary, Zhang, Tiankai, additional, Xu, Wangying, additional, Zeng, Xiaoliang, additional, Xie, Fangyan, additional, Li, Qiang, additional, Chen, Zefeng, additional, Zhou, Fengrui, additional, Wong, Kam Sing, additional, Yan, Keyou, additional, and Xu, Jianbin, additional

Published
2017
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13. Nanostructures: A Smooth CH3 NH3 PbI3 Film via a New Approach for Forming the PbI2 Nanostructure Together with Strategically High CH3 NH3 I Concentration for High Efficient Planar-Heterojunction Solar Cells (Adv. Energy Mater. 23/2015)

Author

Zhang, Hong, primary, Mao, Jian, additional, He, Hexiang, additional, Zhang, Di, additional, Zhu, Hugh L., additional, Xie, Fengxian, additional, Wong, Kam Sing, additional, Grätzel, Michael, additional, and Choy, Wallace C. H., additional

Published
2015
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15. Large-Grain Formamidinium PbI3- xBr x for High-Performance Perovskite Solar Cells via Intermediate Halide Exchange.

Author

Long, Mingzhu, Zhang, Tiankai, Xu, Wangying, Zeng, Xiaoliang, Xie, Fangyan, Li, Qiang, Chen, Zefeng, Zhou, Fengrui, Wong, Kam Sing, Yan, Keyou, and Xu, Jianbin

Subjects
PEROVSKITE, SOLAR cells, HALIDES, THIN films, PHOTOVOLTAIC cells
Abstract

In article number 1601882, Keyou Yan, Jianbin Xu, and co‐workers report a simple intermediate halide exchange reaction between nonstoichiometric FAI and unstable intermediate HPbI2Br to produce high‐quality FAPbI3‐xBrx thin films with crystal domain up to 2‐3 μm, eliminating the use of antisolvent dripping process. And it demonstrates outstanding opto‐electronic performances as well as enhanced stability under moisture and heat stress. [ABSTRACT FROM AUTHOR]

Published
2017
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16. A Smooth CH3NH3PbI3 Film via a New Approach for Forming the PbI2 Nanostructure Together with Strategically High CH3NH3 I Concentration for High Efficient Planar-Heterojunction Solar Cells.

Author

Zhang, Hong, Mao, Jian, He, Hexiang, Zhang, Di, Zhu, Hugh L., Xie, Fengxian, Wong, Kam Sing, Grätzel, Michael, and Choy, Wallace C. H.

Subjects
THIN film research, NANOSTRUCTURED materials, SOLAR cells, PHOTOVOLTAIC cells, PEROVSKITE
Abstract

The photovoltaic performance of perovskite solar cells (PVSCs) is extremely dependent on the morphology and crystallization of the perovskite film, which is affected by the deposition method. In this work, a new approach is demonstrated for forming the PbI2 nanostructure and the use of high CH3 N3 I concentration which are adopted to form high-quality (smooth and PbI2 residue-free) perovskite film with better photovoltaic performances. On the one hand, self-assembled porous PbI2 is formed by incorporating small amount of rationally chosen additives into the PbI2 precursor solutions, which significantly facilitate the conversion of perovskite without any PbI2 residue. On the other hand, by employing a relatively high CH3NH3 I concentration, a firmly crystallized and uniform CH3NH3 PbI3 film is formed. As a result, a promising power conversion efficiency of 16.21% is achieved in planar-heterojunction PVSCs. Furthermore, it is experimentally demonstrated that the PbI2 residue in perovskite film has a negative effect on the long-term stability of devices. [ABSTRACT FROM AUTHOR]

Published
2015
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