Polymer-nanocrystal hybrid photodetectors with planar heterojunctions designed strategically to yield a high photoconductive gain

被引：24

作者：

An, Tae Kyu ^{[1
]}

Park, Chan Eon ^{[1
]}

Chung, Dae Sung ^{[2
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Chem Engn, Organ Elect Lab, Pohang 790784, South Korea

[2] Chung Ang Univ, Sch Chem Engn & Mat Sci, Seoul 156756, South Korea

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 19期

基金：

新加坡国家研究基金会;

关键词：

LIGHT-EMITTING-DIODES; EFFICIENCY; CELLS;

D O I：

10.1063/1.4807422

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate an approach to enhancing the photoresponsivity of a polymer photodetector (PPD). Both conventional bulk heterojunction (BHJ) and planar heterojunction (PHJ) PPDs were fabricated considering that the interface between a CdSe nanocrystal and a polymer can create photoconductive gain. A systematic study of the illumination wavelength and light power dependence of the photocurrent gain, combined with the charge carrier transport analysis, suggested that the PHJ-PPD could yield a higher hole mobility than could be achieved in a BHJ-PPD without compromising on the selective electron trapping effects. The optimized PHJ-PPD led to a photoconductive detectivity of 1.3 x 10(10) cm Hz(1/2)/W. (C) 2013 AIP Publishing LLC.

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页数：4

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