Zn2+ ion doping for structural modulation of lead-free Sn-based perovskite solar cells
- 작성자
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유니스트 김진영
- 조회수
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67
- 첨부파일
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1
링크https://pubs.rsc.org/en/content/articlehtml/2023/ta/d2ta09793a 저자Hyungsu Jang, Hyeong Yong Lim, Chan Beom Park, Jongdeuk Seo, Jung Geon Son, Taehee Song, Jaehwi Lee, Yun Seop Shin, Jina Roe, Sang Kyu Kwak, Dong Suk Kim and Jin Young Kim 발행사항J.Mater.Chem.A (2023) 11, 10605-10611 발행일 2023.04.05 영문초록Sn-based perovskites have intrinsic defects, such as Sn vacancies, oxidised components (Sn4+), and local lattice strain in the perovskite crystalline structure. In this study, Zn metal powder (Zn0) was introduced to reduce Sn oxidation in the solution step based on the redox potential difference. Additionally, Zn2+ was introduced in the perovskite precursor, which decreased the intrinsic defects and lattice strain of the perovskite films. The diffusion length, particularly that of the hole, increased with a reduction in the lattice strain, and Zn doping led to interfacial energy-level alignment of the perovskite and hole-transporting layers. The reduced lattice strain decreased the defect density and charge carrier recombination of perovskite devices. The power conversion efficiency of the Zn-doped Sn-based perovskite solar cell was improved to 11.39% compared to the 8.56% of the reference device.