期刊
MATERIALS TODAY ENERGY
卷 30, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtener.2022.101159
关键词
Perovskite solar cells; Polymer hole transport material; H+ dopants; Ultraviolet-light inducement
资金
- National Natural Science Foundation of China
- [61604101]
- [61805034]
- [61904152]
The UV-light induced H+ doping strategy significantly improves the conductivity of PTPD, leading to enhanced efficiency and stability of perovskite solar cells.
Poly(N,N'-bis(4-butylphenyl)-N,N'-bis(phenyl)benzidine) (PTPD) is an appropriate hole transporting material (HTM) in perovskite solar cells (PSCs) due to its simple fabrication process. However, the relatively low conductivity of PTPD compared with traditional inorganic HTMs limits its application in highly efficient PSCs. Here, we employ an ultraviolet (UV)-light induced H+ doping strategy to improve the conductivity of PTPD hole transporting layer (HTL) for high-performance n-i-p planar structure PSCs. The released proton (H+) from 4-isopropyl-4'-methyldiphenyliodonium tetrakis-(pentafluorophenyl-borate) (DPI-TPFB) induced by UV-light irradiation can coordinate with PTPD to form PTPD-NH+, which dramatically enhances the hole carrier transport and extraction. As a result, a champion power con-version efficiency (PCE) of 21.38% is achieved in PSCs with H+ doped PTPD as HTL, which is much higher than that (17.63%) of the PSCs with pristine PTPD HTL. Furthermore, the stability of the PSCs in humid air is significantly improved after adopting H+ doped PTPD to replace pristine PTPD, owing to the increased hydrophobicity of PTPD HTL.(c) 2022 Elsevier Ltd. All rights reserved.
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