Concurrent Top and Buried Surface Optimization for Flexible Perovskite Solar Cells with High Efficiency and Stability

Liu, Chang1,2,3,4,5; Huang, Kaixin1; Hu, Bihua2,3,4,5; Li, Yaru2,3,4,5; Zhang, Luozheng2,3,4,5; Zhou, Xianyong2,3,4,5; Liu, Yanliang2,3,4,5; Liu, Zhixin6; Sheng, Yifa1; Chen, Shi7; Wang, Xingzhu1,2,3,4,5,6; Xu, Baomin2,3,4,5

2023-02-01

10.1002/adfm.202212698

ADVANCED FUNCTIONAL MATERIALS   Impact Factor & Quartile

1616-301X

1616-3028

Although much progress is made toward enhancing the efficiency of perovskite solar cells (PSCs), their operational reliability, particularly their mechanical stability, which is a crucial factor for flexible PSCs (f-PCSs), has not attracted sufficient attention. The defects in the perovskite layer, especially on the top and the buried surface of the perovskite layer, can induce perovskite fracture, highly limiting the performance of f-PSCs. Herein, a novel multifunctional organic salt, metformin hydrochloride, which can passivate cationic and anionic defects, is incorporated on both the top and buried surfaces of perovskite layer to suppress defects. As a result, a power conversion efficiency (PCE) of 24.40% for rigid PSCs and a PCE of 22.04% for f-PSCs are achieved. Simultaneously, the device can retain 90% and 80% of the initial efficiency after 1000 h of light illumination and 10 000 bending cycles, respectively, showing excellent operational stability. This study may provide a global way to design a passivation strategy and fabricate flexible perovskite solar cells with high efficiency and stability.

defect passivations double-side optimizations flexible perovskite solar cells high performances

SCI

English

NI Journal Papers

Corresponding

National Key Research and Development Project funding from the Ministry of Science and Technology of China[2022YFE0118400] ; National Natural Science Foundation of China["62174078","U19A2089","61904076","62004091"] ; Natural Science Foundation of Hunan Province[2022RC1076] ; China Postdoctoral Science Foundation[2021M691410]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000940755700001

WILEY-V C H VERLAG GMBH

MATERIALS SCIENCE

Web of Science

1.Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Shenzhen Engn Res & Dev Ctr Flexible Solar Cells, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Key Univ Lab Highly Efficient Utilizat Solar Energ, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Guangdong Hong Kong Macao Joint Lab Photon Thermal, Shenzhen 518055, Peoples R China
6.Shenzhen Putai Technol Co Ltd, Shenzhen 518110, Peoples R China
7.Univ Macau, Inst Appl Phys & Mat Engn, Ave Univ, Taipa 999078, Macao, Peoples R China

Liu, Chang,Huang, Kaixin,Hu, Bihua,et al. Concurrent Top and Buried Surface Optimization for Flexible Perovskite Solar Cells with High Efficiency and Stability[J]. ADVANCED FUNCTIONAL MATERIALS,2023.

Liu, Chang.,Huang, Kaixin.,Hu, Bihua.,Li, Yaru.,Zhang, Luozheng.,...&Xu, Baomin.(2023).Concurrent Top and Buried Surface Optimization for Flexible Perovskite Solar Cells with High Efficiency and Stability.ADVANCED FUNCTIONAL MATERIALS.

Liu, Chang,et al."Concurrent Top and Buried Surface Optimization for Flexible Perovskite Solar Cells with High Efficiency and Stability".ADVANCED FUNCTIONAL MATERIALS (2023).