Size and Temperature Dependence of Band-Edge Excitons in PbSe Nanowires

被引：22

作者：

Boercker, Janice E. ^{[1
]}

Clifton, Emily M. ^{[2
]}

Tischler, Joseph G. ^{[1
]}

Foos, Edward E. ^{[1
]}

Zega, Thomas J. ^{[1
]}

Twigg, Mark E. ^{[1
]}

Stroud, Rhonda M. ^{[1
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

[2] USN, Air Syst Command, Patuxent River, MD 20670 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2011年 / 2卷 / 06期

关键词：

MOLAR EXTINCTION COEFFICIENT; SEMICONDUCTOR QUANTUM RODS; COLLOIDAL PBSE; ELECTRONIC-STRUCTURE; ORIENTED ATTACHMENT; OPTICAL-PROPERTIES; CDTE NANOWIRES; SOLAR-CELLS; DOTS; NANOCRYSTALS;

D O I：

10.1021/jz200115w

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the attenuance and temperature-dependent photoluminescence spectra of PbSe nanowires with diameters between 5.6 and 26.4 nm (12-23% relative standard deviation) and lengths greater than 1 mu m. The nanowire first exciton energy varies between 0.3 and 0.6 eV as the diameter decreases from 26.4 to 5.6 nm, respectively. Compared to spherical PbSe nanocrystals, PbSe nanowires show less quantum confinement and larger Stokes shifts. The band gap temperature coefficient (dE(g)/dT) decreases as the nanowire diameter decreases, consistent with previous results for PbSe spherical nanocrystals.

引用

收藏

页码：527 / 531

页数：5

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