摘要
研究了硫脲和硫代硫酸钠体系中ＺｎＳ∶Ｃｕ 纳米微粒的光致发光性能随Ｃｕ＋ 离子掺杂浓度及生长时间的变化． 在３２５ｎｍ 的紫外光激发下， ＺｎＳ∶Ｃｕ 纳米微粒产生位于５００～５４０ｎｍ 的宽带发射， Ｃｕ＋ 掺杂浓度为０．６％ 时发射达到最强． 该发射峰随掺杂浓度的提高和微粒生长时间的延长而红移； 当Ｃｕ＋ 掺杂浓度为０．２％ 时， ＺｎＳ∶Ｃｕ 纳米微粒还产生一个位于４５０ｎｍ 的蓝色发射带， 该发射在掺杂浓度更高时被猝灭． 硫脲和硫代硫酸钠体系中ＺｎＳ∶Ｃｕ 的发光性质较为相似， 但后者的发射强度明显高于前者．
ZnS∶Cu colloid optical properties, which vary with Cu + doping concentration and aging process, were studied in thiourea and thiosulfurate systems. Exited at 325nm, ZnS∶Cu colloid gives off a green band emission from 500 to 540nm, and the highest intensity appears in samples with doping concentration about 0.6%. The green emission band presents obvious red shift as the Cu + doping concentration increases, and it is also red shift with the increasing reaction time. For the samples doped with 0.2% Cu +, a blue emission band at 450nm can also be observed besides the green one, and it will be quenched at higher doping concentration. The optical properties of thiourea and thiosulfurate system are quit similar, but the intensity of the latter is higher than that of the former.
出处
《发光学报》
EI
CAS
CSCD
北大核心
1999年第3期243-246,共4页
Chinese Journal of Luminescence
基金
国家自然科学基金
国家科技部攀登计划
国家教育部博士点基金
北大方正基金
中国博士后基金
关键词
水溶胶
硫脲
光致发光
硫化锌
ZnS∶Cu nanoparticle
thiourea
thiosulfurate
doping concentratio
aging process
