Space-charge limited photocurrent

被引：1012

作者：

Mihailetchi, VD ^{[1
]}

Wildeman, J ^{[1
]}

Blom, PWM ^{[1
]}

机构：

[1] Univ Groningen, Ctr Mat Sci, NL-9747 AG Groningen, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.94.126602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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