摘要
采用Span 80/Tween 80/cyclohexane/wa-ter微乳液体系合成了ZnS∶Fe纳米晶,分别利用XRD、TEM、荧光光谱对其相结构、形貌及光学性能进行了研究。结果表明合成的ZnS∶Fe纳米晶为球形,平均粒度约3nm。随着Fe离子掺杂浓度的增加,发光峰强度先增大后减小,浓度为1%的时候发光峰强最大。对ZnS∶Fe纳米晶的荧光衰减曲线进行测试并计算得到其荧光寿命为3.07ns。
ZnS∶Fe nanocrystals were synthesized in W/O micro-emulsions by using Span 80/Tween 80/cyclohexane/water systems.The crystalline,microscopy and luminescent properties of ZnS∶Cr nanocrystals were characterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM）,and photoluminescence（PL） spectra.The results show that ZnS∶Fe nanocrystals have cubic zinc blende crystal structure,and the size of these spherical particles is 3nm.From PL spectra of ZnS∶Fe nanocrystals in micro-emulsion with different doping concentrations of Fe ion,the intensity of the emission peaks in ZnS∶Fe（1%） nanocrystals was found the strongest,indicating that doping concentration has a great influence on the luminescence properties of ZnS substrate.In addition,the fluorescence decay curves of the ZnS∶Fe nanocrystals were tested,and the calculated fluorescence lifetime of the ZnS∶Fe nanocrystal was 3.07ns.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2012年第1期59-61,65,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(60890203)
关键词
微乳液法
ZnS∶Fe纳米晶
荧光光谱
micro-emulsions method
ZnS∶Fe nanocrystals
photoluminescence spectra
