Interaction of CdSe and ZnO nanocrystals with electron-donor and -acceptor molecules

被引：7

作者：

Dey, Sunita ^{[1
,2
]}

Das, Barun ^{[1
,2
,3
]}

Voggu, Rakesh ^{[1
,2
]}

Nag, Angshuman ^{[3
]}

Sarma, D. D. ^{[3
]}

Rao, C. N. R. ^{[1
,2
,3
]}

机构：

[1] Int Ctr Mat Res, Chem & Phys Mat Unit, Bangalore 560064, Karnataka, India

[2] Jawaharlal Nehru Ctr Adv Sci Res, CSIR, Ctr Excellence Chem, Bangalore 560064, Karnataka, India

[3] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

来源：

CHEMICAL PHYSICS LETTERS | 2013年 / 556卷

关键词：

PHOTOLUMINESCENCE; LIGHT;

D O I：

10.1016/j.cplett.2012.11.046

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：

Interaction of CdSe and ZnO nanocrystals with electron-donating tetrathiafulvalene (TTF) and electron-withdrawing tetracyanoethylene (TCNE) has been investigated. Isothermal calorimetry shows CdSe nanocrystals interact more strongly with TCNE than TTF. Interaction of larger CdSe nanocrystals with TCNE causes a red-shift in the band-edge emission because of agglomeration, while the smaller CdSe nanocrystals, exhibiting stronger interaction with TCNE modify the optical gap of the nanocrystal. Luminescence of CdSe gets quenched sharply after addition of both TTF and TCNE. ZnO nanocrystals also exhibit luminescence quenching to lesser extent. Defect-emission of ZnO nanocrystals gets red or blue-shifted after interaction with TTF or TCNE respectively. (C) 2012 Elsevier B. V. All rights reserved.

引用

页码：200 / 206

页数：7

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