Control of I–V Hysteresis in CH3NH3PbI3 Perovskite Solar Cell
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Other documents of the author: Kim, Hui-Seon; Jang, In-Hyuk; Ahn, Namyoung; Choi, Mansoo; Guerrero, Antonio; Bisquert, Juan; Park, Nam-Gyu
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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http://dx.doi.org/10.1021/acs.jpclett.5b02273 |
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Title
Control of I–V Hysteresis in CH3NH3PbI3 Perovskite Solar CellAuthor (s)
Date
2015-11-09Publisher
ACS PublicationsISSN
1948-7185Bibliographic citation
KIM, Hui-Seon, et al. Control of I–V Hysteresis in CH3NH3PbI3 Perovskite Solar Cell. The journal of physical chemistry letters, 2015, vol. 6, no 22, p. 4633-4639Type
info:eu-repo/semantics/articlePublisher version
http://pubs.acs.org/doi/full/10.1021/acs.jpclett.5b02273Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
Mismatch of current (I)-voltage (V) curves with respect to the scan direction, so-called I–V hysteresis, raises critical issue in MAPbI3 (MA = CH3NH3) perovskite solar cell. Although ferroelectric and ion migration ... [+]
Mismatch of current (I)-voltage (V) curves with respect to the scan direction, so-called I–V hysteresis, raises critical issue in MAPbI3 (MA = CH3NH3) perovskite solar cell. Although ferroelectric and ion migration have been proposed as a basis for the hysteresis, origin of hysteresis has not been apparently unraveled. We report here on the origin of I–V hysteresis of perovskite solar cell that was systematically evaluated by the interface-dependent electrode polarizations. Frequency (f)-dependent capacitance (C) revealed that the normal planar structure with the TiO2/MAPbI3/spiro-MeOTAD configuration showed most significant I–V hysteresis along with highest capacitance (10–2 F/cm2) among the studied cell configurations. Substantial reduction in capacitance to 10–3 F/cm2 was observed upon replacing TiO2 with PCBM, indicative of the TiO2 layer being mainly responsible for the hysteresis. The capacitance was intensively reduced to 10–5 F/cm2 and C–f feature shifted to higher frequency for the hysteresis-free planar structures with combination of PEDOT:PSS, NiO, and PCBM, which underlines the spiro-MeOTAD in part contributes to the hysteresis. This work is expected to provide a key to the solution of the problem on I–V hysteresis in perovskite solar cell. [-]
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