Won-Ik Jeong, Yang Eun Lee, Hyun-Sub Shim, Tae-Min Kim, Sei-Yong Kim and Jang-Joo Kim Photoconductivity of C60 as an Origin of Bias-Dependent Photocurrent in Organic Photovoltaics Advanced Functional Materials 22
The bias-dependent change of the photocurrent in copper phthalocyanine/C60 planar heterojunction solar cells is mainly attributed to charge generation by the process of the bulk ionization in the C60 layer. Due to the photoconductivity of C60, a significant current is generated from the bulk of the C60 layer. This results in a linear dependence of the photocurrent on the applied bias.
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