Photoconductivity from PbS-nanocrystal/semiconducting polymer composites for solution-processible, quantum-size tunable infrared photodetectors

被引：139

作者：

McDonald, SA ^{[1
]}

Cyr, PW ^{[1
]}

Levina, L ^{[1
]}

Sargent, EH ^{[1
]}

机构：

[1] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 11期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

D O I：

10.1063/1.1792380

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report photoconductivity at infrared wavelengths, 975-1300 nm, from a polymer/nanocrystal quantum dot composite. Biased films of the conjugated polymer poly[2-methoxy-5-(2(')-ethylhexyloxy-p-phenylenevinylene)] (MEH-PPV) sensitized with PbS nanocrystals (similar to5 nm diameter) demonstrate photocurrent at wavelengths beyond the response of the polymer and corresponding to the absorption of the nanocrystals. The photocurrent is attributed to absorption in the nanocrystals with subsequent hole transfer to the polymer and had an internal quantum efficiency of similar to5x10(-6) to similar to10(-5) charges/photon at 5 V bias. (C) 2004 American Institute of Physics.

引用

页码：2089 / 2091

页数：3

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