Multiple exciton generation and electrical extraction from a PbSe quantum dot photoconductor

被引：64

作者：

Kim, Sung Jin ^{[1
,2
]}

Kim, Won Jin ^{[2
]}

Sahoo, Yudhisthira ^{[2
]}

Cartwright, Alexander N. ^{[1
,2
]}

Prasad, Paras N. ^{[1
,2
,3
]}

机构：

[1] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA

[2] SUNY Buffalo, Inst Lasers Photon & Biophoton, Buffalo, NY 14260 USA

[3] SUNY Buffalo, Dept Chem, Buffalo, NY 14260 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 03期

关键词：

D O I：

10.1063/1.2835920

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Multiple exciton generation and subsequent electrical extraction from a thin film photoconductive device constructed from PbSe nanocrystal quantum dots are demonstrated. The hydrazine treatment of the PbSe film drastically improves the conductivity of the film while maintaining excellent optical and structural film quality. The effects of multiple exciton generation and electrical extraction (electrons collected per photon absorbed) were quantified as a function of incident photon energy from 1.55 to 3.1 eV. The multiple carrier extraction (>100%) was observed at photon energies greater than 2.8 times of the quantum dot bandgap with similar to 210% measured at 4.4 times the bandgap.

引用

页数：3

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