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Synergistic Passivation of Pyridinium Tetrafluoroborate (PyBF<sub>4</sub>) in Inverted (CsPbI<sub>3</sub>)<sub>0.05</sub>((FAPbI<sub>3</sub>)<sub>1-<i>x</i></s ub>(MAPbBr<sub>3</sub>)<sub><i>x</i></sub>)<sub>0.95</sub> Solar Cells with Atomic Layer Deposited NiO Layers
- Xu, Yinyan;
- Park, Hyoungmin;
- Amornkitbamrung, Urasawadee;
- Jeong, Hyeon Jun;
- Wang, Canjie;
- ... Shin, Hyunjung;
- 외 2명
WEB OF SCIENCE
2SCOPUS
2초록
Nickel oxide (NiO) is a promising hole transport layer (HTL) that can be used to fabricate efficient, large-scale inverted-type perovskite solar cells (PSCs). However, depositing a high-quality perovskite layer on NiO substrates comparable to those realized in the normal structure still presents a challenge. Herein, a pyridinium tetrafluoroborate (PyBF4) additive is introduced to passivate the intrinsic defects in the bulk perovskite films. The nitrogen Lewis base in the PyBF4 molecule interacts well with uncoordinated Pb2+ cations, leading to high-quality perovskite films with minimized defects. Meanwhile, the pseudohalide BF4- can fill halogen vacancies in the perovskite films to enable defect passivation. As a result, the perovskite precursor solution with PyBF4 shows better reproducibility for high-efficiency devices. The optimal PSC based on PyBF4 modification yields a champion power conversion efficiency of 22.7% with atomic layer deposited NiO as the HTL.
키워드
- 제목
- Synergistic Passivation of Pyridinium Tetrafluoroborate (PyBF<sub>4</sub>) in Inverted (CsPbI<sub>3</sub>)<sub>0.05</sub>((FAPbI<sub>3</sub>)<sub>1-<i>x</i></s ub>(MAPbBr<sub>3</sub>)<sub><i>x</i></sub>)<sub>0.95</sub> Solar Cells with Atomic Layer Deposited NiO Layers
- 저자
- Xu, Yinyan; Park, Hyoungmin; Amornkitbamrung, Urasawadee; Jeong, Hyeon Jun; Wang, Canjie; In, Yongjae; Gibson, Aedan; Shin, Hyunjung
- 발행일
- 2025-01
- 유형
- Article; Early Access
- 저널명
- SOLAR RRL
- 권
- 9
- 호
- 2