Issue 1, 2012
From the journal:

CrystEngComm

Facile synthesis and observation of discontinuous red-shift photoluminescence of CdTe/CdS core/shell nanocrystals†

Weiwei Xu,ac   Huaibin Shen,a   Jin Zhong Niu,a   Changhua Zhou,a   Cailan Yu,b   Xiaomin Li,a   Yuan Hang,c   Hongzhe Wang,a   Lan Ma*c  and  Lin Song Li*a  

* Corresponding authors

a Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng, P. R. China
E-mail: lsli@henu.edu.cn
Fax: +86-378-3881358
Tel: +86-378-3881358

b Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, P. R. China

c Life Science Division, Graduate School at Shenzhen, Tsinghua University, Shenzhen, P. R. China
E-mail: malan@sz.tsinghua.edu.cn

Abstract

A simple method was introduced to synthesize CdTe/CdS core/shell nanocrystals (NCs) by using a new kind of “green” tellurium precursor. Both absorption and photoluminescence (PL) spectra of CdTe/CdS NCs exhibited a discontinuous shift as follows: slight (<10 nm), large (∼30 nm), and slight (<10 nm) red-shift during the growth of CdS shell. Different sized CdTe cores were introduced to synthesize CdTe/CdS core/shell NCs and similar discontinuous red-shift phenomena in the PL spectra were observed. These characteristics indicated that the structure of CdTe/CdS NCs gradually evolved from type-I to type-II, in agreement with transmission electron microscopy (TEM), the tuning of PL quantum yields (QYs), and PL lifetime results.

Graphical abstract: Facile synthesis and observation of discontinuous red-shift photoluminescence of CdTe/CdS core/shell nanocrystals

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Article information

DOI
https://doi.org/10.1039/C1CE05757J
Article type
Paper
Submitted
21 Jun 2011
Accepted
16 Sep 2011
First published
25 Oct 2011

CrystEngComm, 2012,14, 272-277

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Facile synthesis and observation of discontinuous red-shift photoluminescence of CdTe/CdS core/shell nanocrystals

W. Xu, H. Shen, J. Z. Niu, C. Zhou, C. Yu, X. Li, Y. Hang, H. Wang, L. Ma and L. S. Li, CrystEngComm, 2012, 14, 272 DOI: 10.1039/C1CE05757J

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