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

Title
Facile synthesis of UV-white light emission ZnSe/ZnS:Mn core/(doped) shell nanocrystals in aqueous phase
Other Titles
ZnS:Mn core
Author
김낙중
Keywords
ZNSE QUANTUM DOTS; SEMICONDUCTOR NANOCRYSTALS; MICROFLUIDIC REACTOR; EFFICIENT; PHOTOLUMINESCENCE; NANOPARTICLES; SURFACE; MANGANESE; EMITTERS
Issue Date
2013-10
Publisher
ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Citation
RSC ADVANCES, 2013, 3(45), P.23395-23401
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 (T-4(1)-(6)A(1) 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.
URI
http://pubs.rsc.org/-/content/articlehtml/2013/ra/c3ra44154ghttp://hdl.handle.net/20.500.11754/44855
ISSN
2046-2069
DOI
10.1039/c3ra44154g
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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