通过混合硫化铅胶体量子点增强基于有机聚合物的光电二极管的光电流。

Enhanced photocurrent from organic polymers-based photodiodes by blending PbS colloidal quantum dots.

作者信息

Zhao Na, Yang Shengyi, Zhang Li, Zhong Haizheng, Liu Ruibin, Zou Bingsuo

机构信息

Lab of Nanophotonics Materials and Technology, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China.

出版信息

J Nanosci Nanotechnol. 2013 Feb;13(2):1163-7. doi: 10.1166/jnn.2013.6043.

DOI:10.1166/jnn.2013.6043

PMID:23646594

Abstract

Enhanced photocurrent from organic polymer-based photodiodes by blending PbS colloidal quantum dots (CQDs) are presented. The absorption spectra of nanocomposites of PbS CQDs and organic polymers, Poly[2-methoxy-5-(2'-ethylhexyloxy-pphenylenevinylene)] (MEH-PPV) and [6,6]-phenyl-C61-butyric acid methylester (PCBM), are the superposition of those of pristine constituents, indicating the absorption of the PbS CQDs contributes to the effective near-infrared light absorption for the photodiodes. The enhanced photocurrent for photodiodes made of MEH-PPV:PCBM:PbS is attributed to the excitons dissociation at the interfaces of PbS/MEH-PPV and PbS/PCBM, as well as charge transport in MEH-PPV and PCBM.

摘要

本文展示了通过混合硫化铅胶体量子点（CQDs）提高基于有机聚合物的光电二极管的光电流。硫化铅CQDs与有机聚合物聚[2-甲氧基-5-（2'-乙基己氧基）-对苯撑乙烯]（MEH-PPV）和[6,6]-苯基-C61-丁酸甲酯（PCBM）的纳米复合材料的吸收光谱是原始成分吸收光谱的叠加，表明硫化铅CQDs的吸收有助于光电二极管有效吸收近红外光。由MEH-PPV:PCBM:PbS制成的光电二极管光电流增强归因于硫化铅/MEH-PPV和硫化铅/PCBM界面处的激子解离，以及MEH-PPV和PCBM中的电荷传输。