Optically detected spin and spin-orbital resonance studies of CdSe/CdS core-shell nanocrystals

被引：4

作者：

Glozman, A ^{[1
]}

Lifshitz, E

机构：

[1] Technion Israel Inst Technol, Dept Chem, IL-32000 Haifa, Israel

[2] Technion Israel Inst Technol, Inst Solid State, IL-32000 Haifa, Israel

来源：

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 2001年 / 15卷 / 1-2期

关键词：

spin; spin-orbital resonance; nanocrystal; CdSe/CdS;

D O I：

10.1016/S0928-4931(01)00226-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The luminescence spectrum of CdSe/CdS core-shell nanocrystals contains a dominant exciton band located at the CdSe core and an additional weak non-excitonic band, associated with trapped carriers. The present paper describes our efforts to identify the influence of CdSe/CdS interfaces on the localization of the photogenerated species, utilizing optically detected magnetic spin and spin-orbit resonance spectroscopy (ODMR). The spin resonance (SR) spectrum showed two resonance signals: the first associated with a trapped hole in a symmetric site within the core, and a second, corresponding to trapped electrons in an anisotropic interface defect site. The spin-orbital resonance (SOR) signals data is presented. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：17 / 19

页数：3

共 10 条

[1]

Alivisatos A. P., 1996, J PHYS CHEM-US, V100, P13266

[2] Evidence for a thermal contribution to emission intermittency in single CdSe/CdS core/shell nanocrystals [J].

Banin, U ;

Bruchez, M ;

Alivisatos, AP ;

Ha, T ;

Weiss, S ;

Chemla, DS .

JOURNAL OF CHEMICAL PHYSICS, 1999, 110 (02) :1195-1201

[3]

GLOZMAN A, UNPUB

[4]

Kadavanich AV, 1997, MATER RES SOC SYMP P, V452, P353

[5] Magnetic circular dichroism study of CdSe quantum dots [J].

Kuno, M ;

Nirmal, M ;

Bawendi, G ;

Efros, A ;

Rosen, M .

JOURNAL OF CHEMICAL PHYSICS, 1998, 108 (10) :4242-4247

[6] Optically detected magnetic resonance study of CdS/HgS/CdS quantum dot quantum wells [J].

Lifshitz, E ;

Porteanu, H ;

Glozman, A ;

Weller, H ;

Pflughoefft, M ;

Echymüller, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (33) :6870-6875

[7]

LIFSHITZ E, IN PRESS J PHYS CHEM

[8] Epitaxial growth of highly luminescent CdSe/CdS core/shell nanocrystals with photostability and electronic accessibility [J].

Peng, XG ;

Schlamp, MC ;

Kadavanich, AV ;

Alivisatos, AP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1997, 119 (30) :7019-7029

[9] Improved efficiencies in light emitting diodes made with CdSe(CdS) core/shell type nanocrystals and a semiconducting polymer [J].

Schlamp, MC ;

Peng, XG ;

Alivisatos, AP .

JOURNAL OF APPLIED PHYSICS, 1997, 82 (11) :5837-5842

[10] Electronic states and optical gain in strained CdS/ZnS quantum structures [J].

Woggon, U ;

Petri, W ;

Dinger, A ;

Petillon, S ;

Hetterich, M ;

Grun, M ;

ODonnell, KP ;

Kalt, H ;

Klingshirn, C .

PHYSICAL REVIEW B, 1997, 55 (03) :1364-1367

← 1 →