Effects of Organic Cations on Carrier Transport at the Interface between Perovskites and Electron Transport Layers in (FA,MA)SnI3 Solar Cells
- 주제(기타) Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
- 설명문(일반) [Bich Phuong Nguyen; Jung, Hye Ri; Jo, William] Ewha Womans Univ, Dept Phys, Seoul 03760, South Korea; [Bich Phuong Nguyen; Jung, Hye Ri; Jo, William] Ewha Womans Univ, New & Renewable Energy Res Ctr NREC, Seoul 03760, South Korea; [Ryu, Ka Yeon; Kim, Kyungkon] Ewha Womans Univ, Dept Chem & Nanosci, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2019
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000165928
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acs.jpcc.9b08859
초록/요약
Charge extraction at carrier transport layers adjacent to perovskites is crucial for the optimization of perovskite solar cells. In particular, Sn-perovskites with no lead elements are known to struggle from charge extraction. Here, we report the effects of organic ligands such as FA and MA (FA = HC(NH2)(2)(+); MA = CH3NH3+) on charge separation at the interface between electron transport layers and perovskites. TiO2 mesoporous covering the tin-perovskites show significant changes in the electronic structure and built-in potentials according to the ratio of FA to MA. Through a local probe with potential and current mapping, charge transport has been intensively examined. The best cell in this study is obtained as 5.37% at FA/MA = 3:1 with only iodine at the halide sites. Even though the value itself is not comparable with lead halides, it could pave a new direction to improve lead-free perovskite solar cells.
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