Enhanced infrared photovoltaic efficiency in PbS nanocrystal/semiconducting polymer composites: 600-fold increase in maximum power output via control of the ligand barrier

被引：51

作者：

Zhang, S ^{[1
]}

Cyr, PW ^{[1
]}

McDonald, SA ^{[1
]}

Konstantatos, G ^{[1
]}

Sargent, EH ^{[1
]}

机构：

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

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 23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：

10.1063/1.2137895

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report a comparison of photoconductive performance of PbS nanocrystal/polymer composite devices containing either oleic acid-capped or octylamine capped nanocrystals (NCs). The octylamine-capped NCs allow over two orders of magnitude more photocurrent under -1 V bias; they also show an infrared photovoltaic response, while devices using oleic acid-capped NCs do not. Further improvement in the photovoltaic performance of films made with octylamine-capped NCs occurs upon thermally annealing the composite layer at 220 degrees C for 1 h. The procedure leads to a 200-fold increase in short circuit current, a 600-fold increase in maximum power output, and an order of magnitude faster response time. (c) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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