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首页> 外文期刊>Applied Physics Letters >Internal electric field in organic-semiconductor-based photovoltaic devices
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Internal electric field in organic-semiconductor-based photovoltaic devices

机译：基于有机半导体的光伏器件中的内部电场

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The authors performed transient photocurrent measurements under applied bias and electroabsorption spectroscopy on devices based on a pristine poly(phenylene vinylene) derivative as well as its mixture with 1% of a methanofullerene electron acceptor. Combining both techniques allows us to directly determine the internal electric field and to conclude on its implication on the photovoltaic performance of the devices. The electric field is identified as the driving force of the photocurrent, hence indicating the maximum obtainable photovoltage. Acceptor concentrations as low as 1% shift the energetic alignment of the top electrode to the reduction potential of the acceptor, reducing the internal electric field.
机译：作者在施加的偏光和电吸收光谱下，对基于原始聚苯撑亚乙烯基衍生物及其与1％的甲基富勒烯电子受体的混合物的器件进行了瞬态光电流测量。两种技术的结合使我们可以直接确定内部电场，并得出其对器件光伏性能的影响。电场被识别为光电流的驱动力，因此表明可获得的最大光电压。低至1％的受主浓度会使顶部电极的能量取向转移至受主的还原电位，从而降低了内部电场。

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