White Emitting ZnS Nanocrystals： Synthesis and Spectrum Characterization

Spherical organic-bonded ZnS nanocrystals with 4.0 4-0.2 nm in diameter are synthesized by a liquid-solid-solution method. The photoluminescence spectrum of sample （[S^2-]/[Zn^2＋] = 1.0） shows a strong white emission with a peak at 490nm and - 170 nm full widths at half maximum. By Gauss fitting, th...

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Published inChinese physics letters Vol. 27; no. 5; pp. 237 - 240
Main Author 黄青松 董冬青 徐建萍 张晓松 张宏敏 李岚
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.05.2010
Subjects
Diodes
Emission
Emittance
Indium gallium nitrides
InGaN
Nanocrystals
Vacancies
White light
Zinc sulfides
ZnS
光致发光光谱
光谱表征
发光二极管灯
晶体合成
白色发光
纳米晶
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Summary:Spherical organic-bonded ZnS nanocrystals with 4.0 4-0.2 nm in diameter are synthesized by a liquid-solid-solution method. The photoluminescence spectrum of sample （[S^2-]/[Zn^2＋] = 1.0） shows a strong white emission with a peak at 490nm and - 170 nm full widths at half maximum. By Gauss fitting, the white emission is attributed to the overlap of a blue emission and a green-yellow emission, originating from electronic transitions from internal S^2- vacancies level to valence band and to the internal Zn^2＋ vacancy level, respectively. After sealingZnS nanocrystals onto InGaN chips, the device shows CIE coordinates of （0.29,0.30）, which indicates their potential applications for white light emitting diodes.
Bibliography:11-1959/O4
O484.1
TN873.3
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/27/5/057306