Optoelectronic conversion by polarization current, triggered by space charges at organic-based interfaces
Optoelectronic conversion by polarization current, triggered by space charges at organic-based interfaces
复制标题
由有机界面上的空间电荷触发的极化电流进行光电转换
DOI：
10.1063/1.3454915
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发表时间：
2010-06-14
影响因子：
4
通讯作者：
Awaga, Kunio
中科院分区：
文献类型：
--
作者：
Hu, Laigui;Noda, Yukiko;Awaga, Kunio
我们报道了一种高效的光电转换可以通过光产生的空间电荷来实现，这种空间电荷通常会对光电流产生阻尼。金属-有机绝缘体-有机半导体-金属光电池的理论分析表明，由光产生的空间电荷触发并由绝缘体层的介电特性控制的大瞬态电流的产生。我们用模型光电池实验证明了这一机制，揭示了通过增加绝缘体的介电常数可以显著提高量子效率。
We report that a highly efficient optoelectronic conversion can be achieved by photogenerated space charges, which usually damp photocurrent. Theoretical analysis of metal-organic insulator-organic semiconductor-metal photocells indicates the generation of a large transient current that is triggered by photogenerated space charges and governed by the dielectric properties of the insulator layer. We experimentally demonstrated this mechanism with model photocells, revealing that the quantum efficiency can be dramatically increased by increasing the dielectric constant of the insulator.