Effect of an Ultra-thin Molybdenum Trioxide Layer and Illumination Intensity on the Performance of Organic Photovoltaic Devices

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• 作者：Fujun Zhang ; Fengyong Sun ; Yuzhu Shi ; Zuliang Zhuo ; Lifang Lu ; Dewei Zhao ; Zheng Xu ; Yongsheng Wang
• 刊名：Energy & Fuels
• 出版年：2010
• 出版时间：July 15, 2010
• 年：2010
• 卷：24
• 期：7
• 页码：3739-3742
• 全文大小：834K
• 年卷期：v.24,no.7(July 15, 2010)
• ISSN：1520-5029

文摘

The effect of an ultra-thin molybdenum trioxide (MoO₃) layer thickness inserted between the indium tin oxide (ITO) substrate and copper phthalocyanine (CuPc) layer on the performance of organic photovoltaic devices (OPVs) was studied. Experimental results demonstrate that the short-circuit current density (J_sc) was decreased slightly with the increase of MoO₃ thickness; meanwhile, the fill factor (FF) was increased from 53.5 to 57.7%, respectively, leading to the improved power conversion efficiency with the optimal thickness of MoO₃ (1 nm). The experimental results also reveal that the Ohmic contact is formed with the deposition of MoO₃. Further, the effect of the MoO₃ layer was checked from the variation of the performance of OPVs under different illumination intensities. It was found that the MoO₃ layer could effectively prevent exciton quenching at the ITO anode side, resulting in the small variation of the FF for the devices with the MoO₃ layer compared to the devices without the MoO₃ layer under high illumination intensity.