Controlled Synthesis of Tuned Bandgap Nanodimensional Alloys of PbSxSe1-x

被引：60

作者：

Akhtar, Javeed ^{[1
,2
]}

Afzaal, Mohammad ^{[3
]}

Banski, Mateusz ^{[4
]}

Podhorodecki, Artur ^{[4
]}

Syperek, Marcin ^{[4
]}

Misiewicz, Jan ^{[4
]}

Bangert, Ursel ^{[5
]}

Hardman, Samantha J. O. ^{[6
,7
]}

Graham, Darren M. ^{[6
,7
]}

Flavell, Wendy R. ^{[6
,7
]}

Binks, David J. ^{[6
,7
]}

Gardonio, Sandra ^{[8
]}

O'Brien, Paul ^{[1
,2
]}

机构：

[1] Univ Manchester, Sch Chem, Manchester M13 9PL, Lancs, England

[2] Univ Manchester, Ctr Mat Sci, Manchester M13 9PL, Lancs, England

[3] King Fahd Univ Petr & Minerals, Ctr Res Excellence Renewable Energy, Dhahran 31261, Saudi Arabia

[4] Wroclaw Univ Technol, Inst Phys, PL-50370 Wroclaw, Poland

[5] Univ Manchester, Ctr Mat Sci, Manchester M1 7HS, Lancs, England

[6] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

[7] Univ Manchester, Photon Sci Inst, Manchester M13 9PL, Lancs, England

[8] Sincrotrone Trieste SCpA, SuperESCA Beamline, I-34012 Trieste, Italy

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 14期

基金：

英国工程与自然科学研究理事会;

关键词：

MULTIPLE EXCITON GENERATION; CHEMICAL-VAPOR-DEPOSITION; QUANTUM DOTS; PHOTOVOLTAIC DEVICES; OPTICAL-PROPERTIES; NANOCRYSTALS; PBS; PBSE/PBS; PHOTOLUMINESCENCE; NANOWIRES;

D O I：

10.1021/ja200750s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Truly alloyed PbSxSe1-x (x = 0-1) nanocrystals (similar to 5 nm in size) have been prepared, and their resulting optical properties are red-shifted systematically as the sulfur content of the materials increases. Their optical properties are discussed using a modified Vegard's approach and the bowing parameter for these nanoalloys is reported for the first time. The alloyed structure of the nanocrystals is supported by the energy-filtered transmission electron microscope images of the samples, which show a homogeneous distribution of sulfur and selenium within the nanocrystals. X-ray photoelectron spectroscopy studies on ligand-exchanged nanocrystals confirmed the expected stoichiometry and various oxidized species.

引用

页码：5602 / 5609

页数：8

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