Photocarrier generation in organic thin-film solar cells with an organic heterojunction
Photocarrier generation in organic thin-film solar cells with an organic heterojunction
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DOI：
10.1016/j.solmat.2005.10.016
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发表时间：
2006-06
影响因子：
6.9
通讯作者：
Takahiro Osasa;Shuhei Yamamoto;Y. Iwasaki;M. Matsumura
中科院分区：
文献类型：
--
作者：
Takahiro Osasa;Shuhei Yamamoto;Y. Iwasaki;M. Matsumura
研究了铜酞菁衍生物(或C60)形成异质结的有机太阳能电池的光电特性。在反向偏置和正向偏置下都观察到了光电流。从光电流作用谱分析，反向光电流的起源是由两个有机层中形成的激子引起的，而正向光电流的起源则是由perene衍生物(或C60)层中形成的激子引起的。温度越高，反向偏压下的光电流密度越大，说明温度越高，电荷复合的可能性越低。根据脉冲光照射后观察到的光电流的时间响应，讨论了电荷分离和输运过程。
Photocurrent–voltage characteristics for organic solar cells with a heterojunction formed between copper phthalocyanine and a perylene derivative (or C60) were studied. The photocurrent was observed under both reverse and forward biases. From the analysis of the photocurrent action spectra, the origin of the reverse photocurrent was attributed to the excitons formed in both the organic layers, whereas that of the forward photocurrent was attributed to the excitons formed in the perylene derivative (or C60) layer. The photocurrent density under reverse bias increased at higher temperatures, suggesting that the charge recombination possibility was lowered at higher temperatures. On the basis of the time responses of the photocurrents observed after pulsed photoirradiation, the charge separation and transport processes are discussed.