Synthesis CdSexS1−x core/shell type quantum dotsvia one injection method

Liang-Yih Chen; Ching-Hsiang Chen; Chih-Hsiang Tseng; Feng-Lu Lai; Bing-Joe Hwang

doi:10.1039/C0CC04074F

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Synthesis CdSe_xS_1−x core/shell type quantum dotsvia one injection method†

Liang-Yih Chen,*^a Ching-Hsiang Chen,^c Chih-Hsiang Tseng,^a Feng-Lu Lai^a and Bing-Joe Hwang^ab

Author affiliations

* Corresponding authors

^a Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Section 4, Keelung Road, Taipei, Taiwan
E-mail: sampras@mail.ntust.edu.tw

^b National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan

^c Protrustech Corporation Limited, 3F.-1, No.293, Sec. 3, Dongmen Rd, East District, Tainan, Taiwan

Abstract

The photoluminescence quantum yield (PL-QY) of ternary colloidal CdSe_xS_1−x quantum dots (QDs), which were prepared by a one-injection method, enhances with increasing S content. The possible enhancement mechanism was explored by structural analysis via X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). Both found that the enhancement of PL-QY of ternary CdSe_xS_1−x QDs strongly correlated with self-formed core/shell conformation in the non-coordination solution.

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Supplementary files

Experimentals; X-ray absorption spectroscopy measurement; TEM images; XAS structural parameters fitting. PDF (5356K)

Article information

DOI: https://doi.org/10.1039/C0CC04074F
Article type: Communication
Submitted: 25 Sep 2010
Accepted: 15 Nov 2010
First published: 29 Nov 2010

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Chem. Commun., 2011,47, 1592-1594

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Synthesis CdSe_xS_1−x core/shell type quantum dotsvia one injection method

L. Chen, C. Chen, C. Tseng, F. Lai and B. Hwang, Chem. Commun., 2011, 47, 1592 DOI: 10.1039/C0CC04074F

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Chemical Communications