Contact and Space-Charge Effects in Quantum Well Infrared Photodetectors
Contact and Space-Charge Effects in Quantum Well Infrared Photodetectors
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量子阱红外光电探测器中的接触和空间电荷效应
DOI：
10.1143/jjap.38.5815
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
H. Liu
中科院分区：
文献类型：
--
作者：
V. Ryzhii;H. Liu
本文提出了一种新的自一致分析模型，用于计算量子阱红外探测器（QWIPs）中的暗电流、电场和空间电荷分布。该模型考虑了来自量子阱的热离子发射、来自发射极接触的电子隧穿注入、激发态和注入态电子穿越量子阱有源区域的输运以及它们被捕获到量子阱中。结果表明，量子阱结构中的电场和空间电荷分布总体上是不均匀的。它们的非均匀性是由结构参数、基本工艺参数和偏置电压之间的关系决定的。
We present the results of a new self-consistent analytical model for the calculation of the dark current and the electric-field and space-charge distributions in quantum well infrared photodetectors (QWIPs). This model takes into account thermionic emission from the QWs, tunneling injection of electrons from the emitter contact, transport of the excited and injected electrons across an active region of a QWIP and their capture into the QWs. It is shown that the electric-field and space-charge distributions in the QW structure are nonuniform in general. The character of their nonuniformity is determined by the relationships between the structural parameters, parameters of elementary processes, and bias voltage.