Photocurrent analysis of organic photovoltaic cells based on CuPc/C60 with Alq3 as a buffer layer |
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| Authors: | Wang Na-N YuJun-Sheng Zang Yue Jiang Ya-Dong |
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| Affiliation: | (State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China) |
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| Abstract: | The performance of an organic photovoltaic (OPV) cell basedon copper phthalocyanine CuPc/C60 with atris-(8-hydroxyquinolinato) aluminum (Alq3) buffer layer hasbeen investigated. It was found that the power conversion efficiencyof the device was 1.51% under illumination with an intensity of100 mW/cm2, which was limited by a square-root dependence ofthe photocurrent on voltage. The photocurrent--optical power densitycharacteristics showed that the OPV cell had a significantspace-charge limited photocurrent with a varied saturation voltageand a three quarters power dependence on optical power density.Also, the absorption spectrum was measured by a spectrophotometer,and the results showed that the additional Alq3 layer has a minoreffect on photocurrent generation. |
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| Keywords: | organic photovoltaic (OPV) cells buffer layer Alq3 space-charge limited current |
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