Pentacene:Fullerene Multilayer-Heterojunction Organic Photovoltaic Cells Fabricated by Alternating Evaporation Method
Pentacene:Fullerene Multilayer-Heterojunction Organic Photovoltaic Cells Fabricated by Alternating Evaporation Method
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交替蒸发法制备并五苯:富勒烯多层异质结有机光伏电池
DOI：
10.1143/jjap.49.032301
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发表时间：
2010
影响因子：
1.5
通讯作者：
M. Ozaki
中科院分区：
文献类型：
--
作者：
J. Sakai;T. Taima;T. Yamanari;Y. Yoshida;A. Fujii;M. Ozaki
报道了一种新型并五苯和富勒烯多层膜有机小分子光伏电池结构。并五苯是一种很有吸引力的光伏电池材料，但它在真空沉积过程中倾向于以分子取向结晶。因此，到目前为止，尽管并五苯/富勒烯双层异质结电池由于其良好的光伏性能而需求，但难以通过共蒸发制造具有富勒烯的本体异质结活性层。在这里，而不是通过共蒸发制备活性层，我们通过交替蒸发制备并五苯和富勒烯多层异质结活性层。研究发现，由于多层电池的激子解离效率和电荷载流子传输特性的改善，多层电池显示出比双层电池更优越的上级光伏性能。
Novel small-molecule organic photovoltaic cell structures with pentacene and fullerene multilayers are reported. Pentacene is an attractive material for photovoltaic cells, but it tends to crystallize with molecular orientation during vacuum deposition. Therefore, thus far, it has been difficult to fabricate a bulk-heterojunction active layer with fullerenes by coevaporation, despite the demand for pentacene/fullerene bilayer heterojunction cells owing to their good photovoltaic performance. Here, instead of preparing an active layer by coevaporation, we prepare a pentacene and fullerene multilayer-heterojunction active layer by alternating evaporation. It was found that multilayer cells show superior photovoltaic performance to bilayer cells owing to the improvements in their exciton dissociation efficiency and charge carrier transport properties.