Issue 45, 2013
From the journal:

RSC Advances

Facile synthesis of UV-white light emission ZnSe/ZnS:Mn core/(doped) shell nanocrystals in aqueous phase

Bich Thi Luong,ab   Eunsu Hyeong,a   Sujin Yoon,a   Jongwan Choia  and  Nakjoong Kim*a  

* Corresponding authors

a Organic Photonic and Electronic Materials Lab, Department of Chemistry and Research Institute for Natural Sciences, Hanyang University, 17 Haengdang-Dong, Seongdong-Gu, Seoul, South Korea
E-mail: marialuongbich@gmail.com, kimnj@hanyang.ac.kr
Fax: +82-2-2295-0572
Tel: +82-2-2220-0935

b Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 01 Mac Dinh Chi Street, Ben Nghe Ward, Ho Chi Minh City, Vietnam
Fax: +84-8-3823-6073
Tel: +84-8-3823-7927

Abstract

ZnSe/ZnS:Mn core/(doped) shell and ZnSe/ZnS:Mn/ZnS core/(doped) shell/shell nanocrystals (NCs) that emit white light were synthesized in aqueous media. White light emission of as-prepared NCs is a result of combined emission of blue light (emission from band gap of ZnSe core) and yellow/orange light (4T1–6A1 emission from Mn2+ ions doped in ZnS of the first shell). Especially, the green emission generated from surface defects was found as a key factor that affects the photoluminescence quantum yields of core/(doped) shell and core/(doped) shell/shell NCs. Photoluminescence from the Mn:ZnS d-dots was easily tuned from 580–600 nm by regulating feeding molar ratio [Zn]/[Mn]. Under the sufficiently low Mn2+ dopant concentration, ZnSe/ZnS:Mn and ZnSe/ZnS:Mn/ZnS NCs emit white light with a quantum yield about 27.6% and 20.5%, respectively.

Graphical abstract: Facile synthesis of UV-white light emission ZnSe/ZnS:Mn core/(doped) shell nanocrystals in aqueous phase

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Article information

DOI
https://doi.org/10.1039/C3RA44154G
Article type
Paper
Submitted
05 Aug 2013
Accepted
01 Oct 2013
First published
14 Oct 2013

RSC Adv., 2013,3, 23395-23401

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Facile synthesis of UV-white light emission ZnSe/ZnS:Mn core/(doped) shell nanocrystals in aqueous phase

B. T. Luong, E. Hyeong, S. Yoon, J. Choi and N. Kim, RSC Adv., 2013, 3, 23395 DOI: 10.1039/C3RA44154G

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