PHOTOSENSITIVE ZNCDS NANOPARTICLES IN A CDS MATRIX FORMED BY HIGH-TEMPERATURE SINTERING OF ZNS AND CDCL2 IN ARGON

Photosensitive ZnCdS (ZCS) nanoparticles in a CdS matrix were formed b y screen printing of ZnS and CdCl2 powders followed by sintering at hi gh temperature in argon. The sintering of the film at high temperature s resulted in the formation of ZnCdS particles by an ion interchange r eaction followed by a solid state reaction. It was observed that the f ilm composition depends on the sintering atmosphere (argon in the pres ent case) and sintering temperature. The photosensitivity of the film depends on parameters like film composition, sintering ambient and sin tering temperature. Influence of these parameters on the dark and phot ocurrent characteristics of ZCS:CdS film is explained by taking into c onsideration the presence of deep acceptor centers related to Cd and Z n vacancies and shallow donor levels due to S vacancies in the films.