New Hybrid Hole Extraction Layer of Perovskite Solar Cells with a Planar p鈥搃鈥搉 Geometry

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• 作者：Ik Jae Park ; Min Ah Park ; Dong Hoe Kim ; Gyeong Do Park ; Byeong Jo Kim ; Hae Jung Son ; Min Jae Ko ; Doh-Kwon Lee ; Taiho Park ; Hyunjung Shin ; Nam-Gyu Park ; Hyun Suk Jung ; Jin Young Kim
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：December 10, 2015
• 年：2015
• 卷：119
• 期：49
• 页码：27285-27290
• 全文大小：336K
• ISSN：1932-7455

文摘

We report a highly efficient p鈥搃鈥搉 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鈥搃鈥搉 type planar perovskite solar cell with the new hybrid hole-extraction layer exhibits a high conversion efficiency of 15.1% without the hysteresis effect.