Space-charge limited photocurrent
Space-charge limited photocurrent
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DOI：
10.1103/physrevlett.94.126602
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发表时间：
2005-04-01
影响因子：
8.6
通讯作者：
Blom, PWM
中科院分区：
文献类型：
--
作者：
Mihailetchi, VD;Wildeman, J;Blom, PWM
1971年，Goodman和Rose预测了在强光下半导体光电流的基本静电极限。共轭聚合物和富勒烯的混合物是通过实验观察这种空间电荷限制的理想模型系统，因为它们结合了不平衡的电荷传输、长寿命、高电荷载流子产生效率以及最慢电荷载流子的低迁移率的联合收割机。实验的光电流揭示了空间电荷限制的光电流的所有特性：一半的功率依赖于电压，四分之三的功率依赖于光强度，和一半的功率缩放的电压，在该光电流切换到完全饱和与光强度。
In 1971 Goodman and Rose predicted the occurrence of a fundamental electrostatic limit for the photocurrent in semiconductors at high light intensities. Blends of conjugated polymers and fullerenes are an ideal model system to observe this space-charge limit experimentally, since they combine an unbalanced charge transport, long lifetimes, high charge carrier generation efficiencies, and low mobility of the slowest charge carrier. The experimental photocurrents reveal all the characteristics of a space-charge limited photocurrent: a one-half power dependence on voltage, a three-quarter power dependence on light intensity, and a one-half power scaling of the voltage at which the photocurrent switches into full saturation with light intensity.