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Effects of Organic Cations on Carrier Transport at the Interface between Perovskites and Electron Transport Layers in (FA,MA)SnI3 Solar Cells

Title
Effects of Organic Cations on Carrier Transport at the Interface between Perovskites and Electron Transport Layers in (FA,MA)SnI3 Solar Cells
Authors
Bich Phuong NguyenJung, Hye RiRyu, Ka YeonKim, KyungkonJo, William
Ewha Authors
조윌렴김경곤
SCOPUS Author ID
조윌렴scopus; 김경곤scopus
Issue Date
2019
Journal Title
JOURNAL OF PHYSICAL CHEMISTRY C
ISSN
1932-7447JCR Link

1932-7455JCR Link
Citation
JOURNAL OF PHYSICAL CHEMISTRY C vol. 123, no. 51, pp. 30833 - 30841
Publisher
AMER CHEMICAL SOC
Indexed
SCI; SCIE; SCOPUS WOS
Document Type
Article
Abstract
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.
DOI
10.1021/acs.jpcc.9b08859
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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