New Hybrid Hole Extraction Layer of Perovskite Solar Cells with a Planar p–i–n Geometry

We report a highly efficient p–i–n type planar perovskite solar cell with a hybrid PEDOT/NiO x hole-extraction layer. It has been found that the perovskite solar cell with a NiO x thin film as a hole-extraction layer generally exhibits lower fill factor compared to the conventionally used PEDOT:PSS...

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Veröffentlicht in:Journal of physical chemistry. C 2015-12, Vol.119 (49), p.27285-27290
Hauptverfasser: Park, Ik Jae, Park, Min Ah, Kim, Dong Hoe, Park, Gyeong Do, Kim, Byeong Jo, Son, Hae Jung, Ko, Min Jae, Lee, Doh-Kwon, Park, Taiho, Shin, Hyunjung, Park, Nam-Gyu, Jung, Hyun Suk, Kim, Jin Young
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Sprache:eng
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Zusammenfassung:We report a highly efficient p–i–n type planar perovskite solar cell with a hybrid PEDOT/NiO x hole-extraction layer. It has been found that the perovskite solar cell with a NiO x thin film as a hole-extraction layer generally exhibits lower fill factor compared to the conventionally used PEDOT:PSS thin film, whereas it shows higher photocurrent and photovoltage. The fill factor of the NiO x -based perovskite solar cell can be significantly improved by treating the NiO x surface with a dilute PEDOT solution. The photoluminescence quenching study and impedance spectroscopic (IS) analysis have revealed that the hole injection at the perovskite/NiO x interface is significantly facilitated with the PEDOT treatment, which should lead to the increased fill factor. As a result, the p–i–n type planar perovskite solar cell with the new hybrid hole-extraction layer exhibits a high conversion efficiency of 15.1% without the hysteresis effect.
ISSN:1932-7447
1932-7455
DOI:10.1021/acs.jpcc.5b09322