Jingjing He

East China University of Science and Technology

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Yu Hou

East China University of Science and Technology

Shuang Yang

East China University of Science and Technology

Hua Gui Yang

East China University of Science and Technology

Yu Peng

East China University of Science and Technology

Zhanpeng Wei

East China University of Science and Technology

Xuesong Leng

Harbin Institute of Technology

Bing Ge

Affiliated Zhongshan Hospital of Dalian University

Qiang Niu

Northwest A&F University

Miaoyu Lin

East China University of Science and Technology

Xinyi Liu

Dalian Institute of Chemical Physics

Cooperative Institutions

East China University of Science and Technology

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Institute of Catalysis and Petrochemistry

Jilin University

Xiamen University

State Council of the People's Republic of China

Hunan University

Shanghai University

Huazhong University of Science and Technology

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A Dendrite‐Structured RbX (X=Br, I) Interlayer for CsPbI₂Br Perovskite Solar Cells with Over 15 % Stabilized Efficiency

ChemSusChem (2020)

Jingjing He Bing Ge Yu Hou Shuang Yang Hua Gui Yang

Abstract Invited for this month′s cover is the group of Shuang Yang at the East China University of Science and Technology. The image shows a dendrite‐structured interlayer for CsPbI 2 Br perovskite solar cells. The Full Paper itself is available at 10.1002/cssc.202001629 .

Dendrite (mathematics)

Perovskite solar cell

10.1002/cssc.202002046

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Citations (2)

Nano-capillary induced assemble of quantum dots on perovskite grain boundaries for efficient and stable perovskite solar cells

Journal of Energy Chemistry (2023)

Miaoyu Lin Jingjing He Xinyi Liu Qing Li Zhanpeng Wei

10.1016/j.jechem.2023.05.006

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Citations (11)

Surface chelation of cesium halide perovskite by dithiocarbamate for efficient and stable solar cells

Nature Communications (2020)

Jingjing He Junxian Liu Yu Hou Yun Wang Shuang Yang

Abstract Surface engineering has been shown critical for the success of perovskite solar cells by passivating the surface enriched defects and mobile species. The discovery of surface modulators with superior interaction strength to perovskite is of paramount importance since they can retain reliable passivation under various environments. Here, we report a chelation strategy for surface engineering of CsPbI 2 Br perovskite, in which dithiocarbamate molecules can be coordinate to surface Pb sites via strong bidentate chelating bonding. Such chelated CsPbI 2 Br perovskite can realize excellent passivation of surface under-coordinated defects, reaching a champion power conversion efficiency of 17.03% and an open-circuit voltage of 1.37 V of CsPbI 2 Br solar cells. More importantly, our chelation strategy enabled excellent device stability by maintaining 98% of their initial efficiency for over 1400 h in ambient condition. Our findings provide scientific insights on the surface engineering of perovskite that can facilitate the further development and application of perovskite optoelectronics.

Passivation

Dithiocarbamate

10.1038/s41467-020-18015-5

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Citations (136)

Cooperative Adsorption of Metal‐organic Complexes on CsPbI₂Br Perovskite Surface for Photovoltaic Efficiency Exceeding 17 %

ChemSusChem (2022)

Yiheng Shi Jingjing He Huijun Lian Xinyi Liu Haiyang Yuan

Inorganic perovskite solar cells have attracted wide attention due to their excellent thermodynamic stability and suitable bandgap as the top absorber materials for tandem solar cells. However, the power conversion efficiencies (PCEs) of the perovskite cells can be considerably limited by the non-radiative energy loss caused by grain boundaries and surfaces. Here, the synergistic functionalization of CsPbI2 Br perovskites was demonstrated by using a metal-organic complex. Experimental and theoretical studies revealed that the adsorption energy of the passivator could be a good descriptor to evaluate the surface passivation effect. The cooperative adsorption could eliminate the unsaturated surface sites, reduce the surface energy, and thus benefit device performance. The CsPbI2 Br solar cells passivated by zinc diethyldithiocarbamate showed a champion power conversion efficiency of 17.15 % and retained 94 % of their initial efficiency after working under 1 sun illumination for 720 h in N2 atmosphere.

Passivation

Surface Modification

Tandem

10.1002/cssc.202201394

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Citations (3)

Advances in cycloaddition and hydroaddition reaction of α-(trifluoromethyl)styrenes without defluorination: An alternative approach to CF3-containing compounds

Chinese Chemical Letters (2021)

Yupian Deng Jingjing He Song Cao Xuhong Qian

Fluorine

10.1016/j.cclet.2021.11.049

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Citations (38)

Front Cover: A Dendrite‐Structured RbX (X=Br, I) Interlayer for CsPbI₂Br Perovskite Solar Cells with Over 15 % Stabilized Efficiency (ChemSusChem 20/2020)

ChemSusChem (2020)

Jingjing He Bing Ge Yu Hou Shuang Yang Hua Gui Yang

The Front Cover shows a dendrite-structured RbX (X=Br, I) interlayer for CsPbI2Br solar cells that realized power conversion efficiencies (PCE) over 15 % with a high open-circuit voltage (VOC) of 1.27 V. This RbX interlayer could optimize the surface wetting behavior of TiO2 films and thus enabled the high quality of perovskite films. Interestingly, such a RbX dendrite-structured interlayer also optimized the contact between perovskite and transport layer as well as passivated surface defects. More information can be found in the Full Paper by J. He et al.

Dendrite (mathematics)

Front cover

Open-circuit voltage

10.1002/cssc.202002047

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Citations (0)

Cover Feature: Cooperative Adsorption of Metal‐organic Complexes on CsPbI₂Br Perovskite Surface for Photovoltaic Efficiency Exceeding 17 % (ChemSusChem 23/2022)

ChemSusChem (2022)

Yiheng Shi Jingjing He Huijun Lian Xinyi Liu Haiyang Yuan

The Cover Feature shows a diethyldithiocarbamate molecule cooperating with a Zn cation to passivate the surface of a perovskite film. This strategy optimized the surface and realized power conversion efficiencies (PCEs) over 17 %. More information can be found in the Research Article by Y. Shi, J. He, H. Lian, et al.

Passivation

Organic molecules

Feature (linguistics)

10.1002/cssc.202202041

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Mechanical strengthening of a perovskite–substrate heterointerface for highly stable solar cells

Energy & Environmental Science (2024)

Xuesong Leng Yichu Zheng Jingjing He Benben Shen Haonan Wang

We show the mechanical strengthening of the buried interface in perovskite solar cells by using a cohesive macromolecular binder. Solar cells with a strengthened interface delivered a T97.5 lifespan of over 1600 h under 1-sun illumination at 55 °C.

10.1039/d4ee00244j

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Citations (8)

Minimizing interfacial energy losses in inverted perovskite solar cells by a dipolar stereochemical 2D perovskite interface

Journal of Energy Chemistry (2023)

Junjie Qian Jingjing He Q. Q. Zhang Chenyue Zhu Shilin Chen

Hysteresis

Perovskite solar cell

10.1016/j.jechem.2023.11.039

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Citations (6)

A Dendrite‐Structured RbX (X=Br, I) Interlayer for CsPbI₂Br Perovskite Solar Cells with Over 15 % Stabilized Efficiency

ChemSusChem (2020)

Jingjing He Bing Ge Yu Hou Shuang Yang Hua Gui Yang

Interface engineering has shown great potential to improve the photovoltaic performance and long-term stability of perovskite solar cells. Herein, RbX (X=Br, I) materials were developed as the interfacial modifiers for CsPbI2 Br solar cells that realized power conversion efficiencies (PCE) over 15 % with a high open-circuit voltage (VOC ) of 1.27 V. The RbX interlayer having a dendrite-shaped structure could optimize the surface wetting behavior of TiO2 films and thus enabled formation of high-quality perovskite films. More importantly, RbX could better align the devices' energy levels and passivate surface defects because of its large bandgap. The PCE of a CsPbI2 Br device with RbX interlayer remained 87 % of its initial efficiency for 800 h in ambient atmosphere.

Passivation

Open-circuit voltage

10.1002/cssc.202001629

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Citations (5)