Efficient photoconductive devices at infrared wavelengths using quantum dot-polymer nanocomposites

被引：95

作者：

Choudhury, KR

Sahoo, Y

Ohulchanskyy, TY

Prasad, PN ^{[1
]}

机构：

[1] SUNY Buffalo, Inst Lasers Photon 7 Biophys, Dept Phys, Buffalo, NY 14260 USA

[2] SUNY Buffalo, Inst Lasers Photon 7 Biophys, Dept Chem, Buffalo, NY 14260 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2011768

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report high photoconductivity and narrow luminescence in nanocomposites of PbSe quantum dots in a polymeric matrix. The nanocomposites are photoactive at infrared wavelengths with narrow emission bands, tunable with the quantum dot sizes. The quantum dots sensitize the polymer at distinct wavelengths across the infrared range between 800 nm and 2 mu m, by virtue of quantum-size effects. Photoconductivity measured in the nanocomposites results in a quantum efficiency of similar to 3%, which is among the highest reported so far in this spectral range. (C) 2005 American Institute of Physics.

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页数：3

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