Intraband spectroscopy and band offsets of colloidal II-VI core/shell structures

被引：72

作者：

Pandey, Anshu ^{[1
]}

Guyot-Sionnest, Philippe ^{[1
]}

机构：

[1] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2007年 / 127卷 / 10期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2766957

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：

The interband and intraband spectra of colloidal II-VI CdS and CdSe quantum dot cores and CdS/ZnSe, CdS/CdSe, CdSe/CdS, and CdSe/ZnSe core/shell systems are reported. Infrared absorption peaks between 0.5 and 0.2 eV are observed. The slope of the intraband energy versus the first interband absorption feature is characteristic of the relative band alignments of the materials constituting the core and the shell and it is analyzed within an effective mass model. The analysis provides a new estimate of the band gap of zinc blende CdSe as well as the band offsets in zinc blende and wurtzite CdSe, CdS, and ZnSe.

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页数：10

相关论文

共 43 条

[1] The effect of Auger heating on intraband carrier relaxation in semiconductor quantum rods [J].

Achermann, Marc ;

Bartko, Andrew P. ;

Hollingsworth, Jennifer A. ;

Klimov, Victor I. .

NATURE PHYSICS, 2006, 2 (08) :557-561

[2] ELECTRONIC STATES IN SEMICONDUCTOR HETEROSTRUCTURES [J].

BASTARD, G ;

BRUM, JA .

IEEE JOURNAL OF QUANTUM ELECTRONICS, 1986, 22 (09) :1625-1644

[3] Colloidal two-dimensional systems: CdSe quantum shells and wells [J].

Battaglia, D ;

Li, JJ ;

Wang, YJ ;

Peng, XG .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (41) :5035-5039

[4] A NEW EFFECTIVE-MASS EQUATION FOR MICROSTRUCTURES [J].

BURT, MG .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1988, 3 (12) :1224-1226

[5] INTERFACIAL ATOMIC-STRUCTURE AND BAND OFFSETS AT SEMICONDUCTOR HETEROJUNCTIONS [J].

DANDREA, RG ;

DUKE, CB ;

ZUNGER, A .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1992, 10 (04) :1744-1753

[6] Conduction band offset of the CdS ZnSe heterostructure [J].

Dinger, A ;

Petillon, S ;

Grün, M ;

Hetterich, M ;

Klingshirn, C .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1999, 14 (07) :595-598

[7]

EFROS AL, 1995, SOLID STATE COMMUN, V93, P281, DOI 10.1016/0038-1098(94)00780-2

[8] Quantum size level structure of narrow-gap semiconductor nanocrystals: Effect of band coupling [J].

Efros, AL ;

Rosen, M .

PHYSICAL REVIEW B, 1998, 58 (11) :7120-7135

[9] The electronic structure of semiconductor nanocrystals [J].

Efros, AL ;

Rosen, M .

ANNUAL REVIEW OF MATERIALS SCIENCE, 2000, 30 :475-521

[10] ABSORPTION AND INTENSITY-DEPENDENT PHOTOLUMINESCENCE MEASUREMENTS ON CDSE QUANTUM DOTS - ASSIGNMENT OF THE 1ST ELECTRONIC-TRANSITIONS [J].

EKIMOV, AI ;

HACHE, F ;

SCHANNEKLEIN, MC ;

RICARD, D ;

FLYTZANIS, C ;

KUDRYAVTSEV, IA ;

YAZEVA, TV ;

RODINA, AV ;

EFROS, AL .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1993, 10 (01) :100-107

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