Near-infrared photodetection based on PbS colloidal quantum dots/organic hole conductor

被引：25

作者：

Im, Sang Hyuk ^{[1
]}

Chang, Jeong Ah ^{[1
]}

Kim, Sung Woo ^{[2
]}

Kim, Sang-Wook ^{[2
]}

Seok, Sang Il ^{[1
]}

机构：

[1] Korea Res Inst Chem Technol, Adv Mat Div, KRICT EPFL Global Res Lab, Taejon 305600, South Korea

[2] Ajou Univ, Dept Mol Sci & Technol, Suwon 443749, South Korea

来源：

ORGANIC ELECTRONICS | 2010年 / 11卷 / 04期

关键词：

Near-infrared; Photodetection; PbS colloidal quantum dots; Organic hole conductor; Nanoporous TiO2;

D O I：

10.1016/j.orgel.2009.12.021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have developed Near-infrared (NIR)-sensitive heterojunction cells consisting of n-type PbS colloidal quantum dots (CQDs) (low bandgap) anchored on the nanoporous TiO2 (np-TiO2, high-bandgap), and p-type spiro-OMeTAD (2,2',7,7'-tetrakis(N, N-di-p-methoxyphenylamine)9,9'-spirobifluorene). In these cells, an n-type np-TiO2 layer acts both as a host that chemically binds to the PbS CQDs and as an electron carrier. The number of PbS CQDs loaded onto the np-TiO2 layer not only increases the external quantum efficiency (EQE) but also reduces the response time in the NIR region. The performance of these devices increased upon the introduction of a TiOx layer between the PbS CQDs and spiro-OMeTAD followed by heat treatment at 110 degrees C for 1 min. (C) 2009 Elsevier B. V. All rights reserved.

引用

页码：696 / 699

页数：4

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