Enhanced charge collection with passivation of the tin oxide layer in planar perovskite solar cells
- Authors
- Lee, Yonghui; Paek, Sanghyun; Cho, Kyung Taek; Oveisi, Emad; Gao, Peng; Lee, Seunghwan; Park, Jin-Seong; Zhang, Yi; Humphry-Baker, Robin; Asiri, Abdullah M.; Nazeeruddin, Mohammad Khaja
- Issue Date
- Jul-2017
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.5, no.25, pp.12729 - 12734
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Volume
- 5
- Number
- 25
- Start Page
- 12729
- End Page
- 12734
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/19578
- DOI
- 10.1039/c7ta04128d
- ISSN
- 2050-7488
- Abstract
- Tin oxide is an excellent candidate to replace mesoporous TiO₂ electron transport layers (ETLs) in perovskite solar cells. Here, we introduced a SnO₂ layer by a low-temperature solution process, and investigated its morphology, opto-physical and electrical properties affecting the device performance. We reveal that low-temperature processed SnO₂ is self-passivating in nature, which leads to a high efficiency. To further enhance the blocking effect, we combined a compact TiO₂ underlayer with the SnO₂ contact layer, and found that the bi-layered ETL is superior compared to single layers. The best device shows photovoltaic values in a planar structure with a short-circuit current density (J(sc)) of 22.58 mA cm⁻², an open-circuit voltage (V-oc) of 1.13 V, a fill factor (FF) of 0.78, and a power conversion efficiency (PCE) of 19.80% under 1 sunlight illumination.
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