通过湿化学路线制备的CdS/Zn2SiO4纳米复合材料的表面钝化

Surface passivation of CdS/Zn2SiO4 nanocomposites prepared by a wet chemical route.

作者信息

Lee Hyun Joo, Lee Soo Il

机构信息

Department of Physics Education, Chosun University, Gwangju, 501-759, Korea.

出版信息

J Nanosci Nanotechnol. 2006 Nov;6(11):3369-72. doi: 10.1166/jnn.2006.012.

DOI:10.1166/jnn.2006.012

PMID:17252767

Abstract

Highly luminescent CdS/Zn2SiO4 nanocrystals were prepared by a wet chemical method. The effect of surface passivation was observed in photoluminescence measurements of CdS nanocrystals embedded in colloidal nanocrystallite or amorphous Zn2SiO4 matrix. The resultant luminescent emission of as-prepared CdS/Zn2SiO4 nanocomposite thin films displays two distinct components. One is attributed to the band-edge emission and the other is due to the surface defects. The effect of aging on CdS/Zn2SiO4 nanocomposite thin films has been investigated, showing the active role of Zn2SiO4 matrix in modifying the surface states.

摘要

采用湿化学法制备了高发光的CdS/Zn2SiO4纳米晶体。在嵌入胶体纳米微晶或非晶态Zn2SiO4基质中的CdS纳米晶体的光致发光测量中观察到了表面钝化的效果。所制备的CdS/Zn2SiO4纳米复合薄膜的发光发射显示出两个不同的成分。一个归因于带边发射，另一个归因于表面缺陷。研究了老化对CdS/Zn2SiO4纳米复合薄膜的影响，表明Zn2SiO4基质在修饰表面态方面起到了积极作用。