制备工艺对ZnS：Ag纳米颗粒发光性质的影响  

Effect of the process on luminescence properties of ZnS：Ag nanoparticles

作　　者：曲华[1] 曹立新[1] 苏革[1] 柳伟[1] 姜代旬[1] 董博华[1] 孙远光[1] 

机构地区：[1]中国海洋大学材料科学与工程研究院,山东青岛266100

出　　处：《功能材料》2007年第A01期135-137,共3页Journal of Functional Materials

基　　金：基金项目：国家自然科学基金资助项目（50672089）;山东省优秀中青年科学家奖励基金资助项目（2006BS04034）

摘　　要：采用水热法制得ZnS：Ag纳米颗粒，并研究了制备工艺细节对产品发光性质的影响。在一定的工艺条件下，可以得到与体材料相近的中心位于445nm左右的发光，归属于硫空位相关的电子陷阱施主扣银相关的空穴陷阱受主的复合；改变反应物的加入顺序，或采用鼓风迅速冷却时，则在表面作用影响下，只能得到峰值位于490nm左右的较弱发光，归于硫空位相关的表面缺陷发光。ZnS：Ag nanoparticles have been prepared by hydrothermal method and the effect of the process on luminescence properties is investigated. Luminescence centering round 445 nm was obtained. This emission is ascribed to the recombination between the sulfur vacancy-related electron trap donor having a energy level just below the conduction band and the Ag-related hole trap acceptor above the valence band. The different sequence of adding reagents and the blast cooling after reaction lead to a dominant surface effect, which influences the luminescence of ZnS：Ag nanoparticles. Luminescence centering round 490 nm with a much weaker intensity was obtained. This emission is assigned to surface states or crystal defects which lie at energy levels within the bandgap.

关 键 词：ZnS:Ag 水热法 发光 纳米颗粒 工艺 

分 类 号：O611.4[理学—无机化学] O614.24[理学—化学]