STUDY THE EFFECT OF DOPPING , ANNEALING AND THICKNESS ON OPTICAL PROPERTIES OF CDS THIN FILMS

Abstract

Include this research studied the effect some Physics Properties as dopping [by C0 perhaps(3%)] , annealing [at temperature (300C0) for an half hour] and change thickness [(160 , 300) nm] on the some optical properties of CdS thin film which was prepared by thermal chemical phyrolysis method .We prepared many modul of (CdS)Thin film (pure , doping , before annealing , after annealing and different thickness). We notice the effect of each from increase thickness and annealing lead to decrease in forbidden energy gap value , while we notice the effect of dopping lead to increase in forbidden energy gap value. Results showed that energy gap value after annealing for thickness(300 nm) for pure film (2.39)eV and dopping film (2.43)eV , so energy gap value before annealing for pure film and same thickness(300 nm) (2.42)eV , while energy gap value after annealing for thickness (160 nm) (2.58) eV . We notice that over properties had apronoced effect on the few optical properties (Absorptance , Absorption Coefficient , Extinction Coefficient ).