Stable pure-iodide wide-band-gap perovskites for efficient Si tandem cells via kinetically controlled phase evolution
- Authors
- Ji, Su Geun; Park, Ik Jae; Chang, Hogeun; Park, Jae Hyun; Hong, Geon Pyo; Choi, Back Kyu; Jang, Jun Ho; Choi, Yeo Jin; Lim, Hyun Woo; Ahn, You Jin; Park, So Jeong; Nam, Ki Tae; Hyeon, Taeghwan; Park, Jungwon; Ki, Dong Hoe; Kim, Jin Young
- Issue Date
- Oct-2022
- Publisher
- CELL PRESS
- Keywords
- crystallization kinetics/thermodynamics; perovskite/Si tandem; photo-stable; pure-iodide wide-band-gap perovskite; tolerance factor control
- Citation
- JOULE, v.6, no.10, pp 2390 - 2405
- Pages
- 16
- Journal Title
- JOULE
- Volume
- 6
- Number
- 10
- Start Page
- 2390
- End Page
- 2405
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/152384
- DOI
- 10.1016/j.joule.2022.08.006
- ISSN
- 2542-4351
- Abstract
- Halide perovskites, promising top-cell materials for efficient Si tan-dem solar cells, suffer from halide segregation, which results from the halide mixing necessary for achieving band-gap widening. We report pure-iodide wide-band-gap perovskite top cells that are fundamentally free of halide segregation. Cs and dimethylammo-nium cations were incorporated simultaneously into the A-site of perovskite structure to increase the band gap while maintaining the tolerance factor. However, the incorporation of dual cations re-sulted in the simultaneous formation of orthorhombic and hexago-nal secondary phases rather than forming the pure perovskite phase, owing to the different precipitation kinetics between cat-ions. We demonstrated that this strategy can only be implemented by the phase-controlled nucleation of the Cs-rich composition that governs the desired phase evolution. The pure-iodide perovskite top cell exhibited excellent photo-stability (1% degradation after 1,000 h of continuous operation; ISOS-L-1I, white LED), and its Si tandem exhibited a high conversion efficiency of 29.4% (28.37% certified).
- Files in This Item
-
Go to Link
- Appears in
Collections - ETC > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.