Lateral photocurrent spectroscopy on self-assembled PbSe quantum dots

被引：12
|
作者：
Simma, M [1 ]
Fromherz, T [1 ]
Raab, A [1 ]
Springholz, G [1 ]
Bauer, G [1 ]
机构：
[1] Johannes Kepler Univ, Inst Halbeiter & Festkorperphys, A-4040 Linz, Austria
来源：
APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 20期
基金：
奥地利科学基金会;
关键词：
D O I：
10.1063/1.2202127
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Wavelength- and temperature-dependent lateral photocurrent measurements were performed on self-assembled PbSe/PbEuTe quantum-dot superlattices. The comparison of the measured data with absorption spectra calculated within the envelope function approach allows a clear identification of the different features in the photocurrent spectra. The photocurrent signal from the dots is observed over a wide temperature range and no quenching occurs even at 5 K. This indicates a type-II band alignment for the strained PbSe/PbEuTe quantum-dots. (c) 2006 American Institute of Physics.
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页数：3
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