Bifunctional Passivation through Fluoride Treatment for Highly Efficient and Stable Perovskite Solar Cells

Liu, Chang1,2,3,4,5; Zhang, Jiyao1,2,3,4,5; Zhang, Luozheng1,2,3,4,5; Zhou, Xianyong2,3,4,5; Liu, Yanliang2,3,4,5; Wang, Xingzhu1,2,3,4,5; Xu, Baomin2,3,4,5

2022-06-01

10.1002/aenm.202200945

Advanced Energy Materials   影响因子和分区

1614-6832

1614-6840

Due to the low formation energy, surface defects are more likely to form on the surface of TiO2 films, resulting in a decline in the efficiency and stability of perovskite solar cells (PSCs). Additionally, defects on the bottom surface of the perovskite layer in contact with TiO2 play a key role in V-oc (open circuit voltage) loss and the PSC degradation process. Therefore, to improve the efficiency and stability of PSCs, it is critical to develop a reproducible and low-cost method for passivating the defects on both the TiO2 surface and on the bottom surface of the perovskite layer. In this work, fluoride is utilized as a bifacial contact passivation agent for decreasing the number of defects on the TiO2 surface and the bottom surface of the perovskite layer. PSC efficiency can be significantly increased from 21.3% to 23.7% with fluoride passivation. In addition, the long-term stability of PSCs, especially light irradiation stability, can be markedly improved. The passivation effects of fluoride treatment on TiO2 films are studied by theoretical calculation and experimental characterization. This work provides a thorough understanding of the TiO2/perovskite interface and demonstrates an approach for improving the efficiency and stability of PSCs.

defects' passivation fluoride treatments perovskite solar cells

SCI ; EI

英语

第一 ; 通讯

National Key Research and Development Project funding from the Ministry of Science and Technology of China["2021YFB3800100","2021YFB3800101"] ; National Natural Science Foundation of China[61904076,62174078,"U19A2089"] ; Natural Science Foundation of Guangdong Province["2020A1515010980","2019B1515120083"] ; Peacock Team Project funding from the Shenzhen Science and Technology Innovation Committee[KQTD2015033110182370] ; Key Fundamental Research Project funding from the Shenzhen Science and Technology Innovation Committee[JCYJ20200109141014474] ; Shenzhen Engineering R&D Center for Flexible Solar Cells Project from Shenzhen Development and Reform Committee[2019-126] ; Guangdong-Hong Kong-Macao Joint Laboratory[2019B121205001]

Chemistry ; Energy & Fuels ; Materials Science ; Physics

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000815735000001

WILEY-V C H VERLAG GMBH

20222612273871

Fluorine compounds ; Open circuit voltage ; Passivation ; Perovskite ; Stability ; Surface defects ; Titanium dioxide

Minerals:482.2 ; Protection Methods:539.2.1 ; Solar Cells:702.3 ; Inorganic Compounds:804.2 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, 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 Ener, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Guangdong Hong Kong Macao Joint Lab Photon Therma, Shenzhen 518055, Peoples R China

Liu, Chang,Zhang, Jiyao,Zhang, Luozheng,et al. Bifunctional Passivation through Fluoride Treatment for Highly Efficient and Stable Perovskite Solar Cells[J]. Advanced Energy Materials,2022,12.

Liu, Chang.,Zhang, Jiyao.,Zhang, Luozheng.,Zhou, Xianyong.,Liu, Yanliang.,...&Xu, Baomin.(2022).Bifunctional Passivation through Fluoride Treatment for Highly Efficient and Stable Perovskite Solar Cells.Advanced Energy Materials,12.

Liu, Chang,et al."Bifunctional Passivation through Fluoride Treatment for Highly Efficient and Stable Perovskite Solar Cells".Advanced Energy Materials 12(2022).