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Zn2SnO4-Based Photoelectrodes for Organolead Halide Perovskite Solar Cells

Authors
Oh, Lee SeulKim, Dong HoeLee, Jin AhShin, Seong SikLee, Jin-WookPark, Ik JaeKo, Min JaePark, Nam-GyuHong, Kug SunKim, Jin YoungPyo, Sung Gyu
Issue Date
Oct-2014
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.118, no.40, pp 22991 - 22994
Pages
4
Journal Title
JOURNAL OF PHYSICAL CHEMISTRY C
Volume
118
Number
40
Start Page
22991
End Page
22994
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/147264
DOI
10.1021/jp509183k
ISSN
1932-7447
1932-7455
Abstract
We report a new ternary Zn2SnO4 (ZSO) electron-transporting electrode of a CH3NH3PbI3 perovskite solar cell as an alternative to the conventional TiO2 electrode. The ZSO-based perovskite solar cells have been prepared following a conventional procedure known as a sequential (or two-step) process with ZSO compact/mesoscopic layers instead of the conventional TiO2 counterparts, and their solar cell properties have been investigated as a function of the thickness of either the ZSO compact layer or the ZSO mesoscopic layer. The presence of the ZSO compact layer has a negligible influence on the transmittance of the incident light regardless of its thickness, whereas the thickest compact layer blocks the back electron transfer most efficiently. The open-circuit voltage and fill facor increase with the increasing thickness of the mesoscopic ZSO layer, whereas the short circuit current density decreases with the increasing thickness except for the thinnest one (similar to 100 nm). As a result, the device with a 300 nm-thick mesoscopic ZSO layer shows the highest conversion efficiency of 7%. In addition, time-resolved and frequency-resolved measurements reveal that the ZSO-based perovskite solar cell exhibits faster electron transport (similar to 10 times) and superior charge-collection capability compared to the TiO2-b
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첨단소재·전자융합공학부 (신소재물리전공)
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