title: Photoconductive Cathode Interlayer for Highly Efficient Inverted Polymer Solar Cells.
abstract: A highly photoconductive cathode interlayer was achieved by doping a 1 wt % light absorber, such as perylene bisimide, into a ZnO thin film, which absorbs a very small amount of light but shows highly increased conductivity of 4.50 × 10(-3) S/m under sunlight. Photovoltaic devices based on this kind of photoactive cathode interlayer exhibit significantly improved device performance, which is rather insensitive to the thickness of the cathode interlayer over a broad range. Moreover, a power conversion efficiency as high as 10.5% was obtained by incorporation of our photoconductive cathode interlayer with the PTB7-Th:PC71BM active layer, which is one of the best results for single-junction polymer solar cells.
authors.affiliation: †Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.
authors.forename: Li
authors.initials: L
authors.lastname: Nian
authors.affiliation: †Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.
authors.forename: Wenqiang
authors.initials: W
authors.lastname: Zhang
authors.affiliation: †Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.
authors.forename: Na
authors.initials: N
authors.lastname: Zhu
authors.affiliation: †Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.
authors.forename: Linlin
authors.initials: L
authors.lastname: Liu
authors.affiliation: †Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.
authors.forename: Zengqi
authors.initials: Z
authors.lastname: Xie
authors.affiliation: †Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Wu
authors.forename: Frank
authors.initials: F
authors.lastname: Würthner
authors.affiliation: †Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.
authors.forename: Yuguang
authors.initials: Y
authors.lastname: Ma