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Optimization of electron transport and cathode materials for efficient organic solar cells

机译:优化用于高效有机太阳能电池的电子传输和阴极材料

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In this work we discuss improvements of organic solar cells based on poly(3-hexylthiophene-2,5-diyl) : C_(61)- butyric acid methyl ester (P3HT:PCBM) blends. The polymer layer is combined with various electron transport materials and different cathodes. We were able to utilize the good charge carrier separation and transport properties of the P3HT:PCBM blend together with the flexibility of evaporated heterostructures. The systematic use of different cathodes such as calcium, aluminium/lithiumfluoride and organic intermediate layers resulted in higher fill factors and open circuit voltages compared to simple aluminium cathodes. In particular we studied the influence of additional layers of electron transport layer consisting of C_(60), lithium doped bathophenanthroline (BPhen:Li) 2-(4-tert-butylphenyl)-5-(4-biphenylyl)-1,3,4-oxadiazole (PBD) and 2,9- dimethyl-4,7-diphenyl-1,10-phenantrolene (BCP) on the cell properties. Solar cells with power conversion efficiencies well above 3% have been fabricated.
机译:在这项工作中,我们讨论了基于聚(3-己基噻吩-2,5-二基):C_(61)-丁酸甲酯(P3HT:PCBM)共混物的有机太阳能电池的改进。聚合物层与各种电子传输材料和不同的阴极结合在一起。我们能够利用P3HT:PCBM共混物的良好电荷载流子分离和传输特性以及蒸发的异质结构的灵活性。与简单的铝阴极相比,系统地使用不同的阴极(例如钙,铝/氟化锂和有机中间层)会导致更高的填充系数和开路电压。特别是,我们研究了由C_(60),掺杂锂的邻菲咯啉(BPhen:Li)2-(4-叔丁基苯基)-5-(4-联苯基)-1,3, 4-恶二唑(PBD)和2,9-二甲基-4,7-二苯基-1,10-菲咯啉(BCP)对细胞性能的影响。已经制造出功率转换效率远高于3%的太阳能电池。

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