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
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ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/27/5/057306

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Abstract 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.
AbstractList 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.
Spherical organic-bonded ZnS nanocrystals with 4.0 plus or minus 0.2 nm in diameter are synthesized by a liquid-solid-solution method. The photoluminescence spectrum of sample ([S2-]/[Zn2+] = 1.0) shows a strong white emission with a peak at 490 nm 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 S2- vacancies level to valence band and to the internal Zn2+ 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.
Author 黄青松 董冬青 徐建萍 张晓松 张宏敏 李岚
AuthorAffiliation Institute of Material Physics, Tianjin Key Laboratory for Optoelectronic Materials and Devices, Key Laboratory of Display Materials and Photoelectric Devices of Ministry of Education; and Engineering Research Center ofCommunication Devices and Technology of Ministry of Education, Tianjin University of Technology, Tianjin 300384
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Snippet 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...
Spherical organic-bonded ZnS nanocrystals with 4.0 plus or minus 0.2 nm in diameter are synthesized by a liquid-solid-solution method. The photoluminescence...
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SubjectTerms 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
Title White Emitting ZnS Nanocrystals: Synthesis and Spectrum Characterization
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