Band Alignment Engineering between Planar SnO2 and Halide Perovskites via Two-Step Annealing
- Authors
- Lee, Jung Hwan; Shin, Dongguen; Rhee, Ryan; Yun, Sangeun; Yeom, Kyung Mun; Chun, Do Hyung; Lee, Sunje; Kim, Dongho; Yi, Yeonjin; Noh, Jun Hong; Park, Jong Hyeok
- Issue Date
- 7-11월-2019
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.10, no.21, pp.6545 - 6550
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY LETTERS
- Volume
- 10
- Number
- 21
- Start Page
- 6545
- End Page
- 6550
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/61916
- DOI
- 10.1021/acs.jpclett.9b02488
- ISSN
- 1948-7185
- Abstract
- Managing defects in SnO2 is critical for improving the power conversion efficiency (PCE) of halide perovskite-based solar cells. However, typically reported SnO2 _based perovskite solar cells have inherent defects in the SnO2 layer, which lead to a lower PCE and hysteresis. Here, we report that a dual-coating approach for SnO2 with different annealing temperatures can simultaneously form a SnO2 layer with high crystallinity and uniform surface coverage. Along with these enhanced physical properties, the dual-coated SnO2 layer shows favorable band alignment with a mixed halide perovskite. After careful optimization of the dual-coating method, the average PCE of the perovskite solar cell based on the dual-coated SnO2 layer increases from 18.07 to 19.23% with a best-performing cell of 20.03%. Note that a facile two-step coating and annealing method can open new avenues to develop SnO2-based perovskite solar cells with stabilized and improved photovoltaic performances.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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