Influence of the Annealing Temperature on the Optical and Solid Stateproperties of Lead Selenide (PBSE) Thin Films Grown by Chemical Bath Deposition (CBD) Technique.

Abstract

The study of the influence of annealing temperature on Lead Selenide (PbSe) thin films deposited on glasssubstrates using chemical bath deposition technique were carried out. The growth of the first group of the films(Set 1: P(9) &P(14)) was based on the decomposition of lead citrate and sodium selenosulphite in the presence ofsodium citrate and sodium hydroxide with Ammonia and Triethalamine(TEA) acting as complexing agents andP.H stabilizers; while in the second group (Set 2: P(15)), the reaction bath was made up of solutions of lead nitratePb(NO3)2, (PVA), distilled water (H2O), ammonia (NH3), sodium selenosulphite (Na2SeSO3) and Triethalamine[N(CH2CH2OH)], which was used as complexing agent. The deposited materials were identified by X-raydiffraction. In addition, optical and morphological investigations performed revealed the morphological structureof the film. The absorbance of the film for various region of the electromagnetic spectrum was observed. Theoptical absorbance was found to reduce with increase in wavelength. The optical band gap a ranges from 1.26 –2.00eV with sample P(15) having the lowest direct band gap.Keywords: Annealing temperature, Chemical Bath Technique, Lead selenide, thin films, Optical and Solid stateproperties, band gaps, transmittance, wavelength.