Influence of the annealing temperature on the optical and solid stateproperties of lead selenide (PbSe) thin films grown by chemical bath deposition (CBD) technique

摘要

The study of the influence of annealing temperature on Lead Selenide (PbSe) thin filmsdeposited on glass substrates 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 thedecomposition of lead citrate and sodium selenosulphite in the presence of sodium citrateand sodium hydroxide with Ammonia and Triethalamine(TEA) acting as complexingagents and P.H stabilizers; while in the second group (Set 2: P(15)), the reaction bath wasmade up of solutions of lead nitrate Pb(NO3)2, (PVA), distilled water (H2O), ammonia(NH3), sodium selenosulphite (Na2SeSO3) and Triethalamine [N(CH2CH2OH)], which wasused as complexing agent. The deposited materials were identified by X-ray diffraction. Inaddition, optical and morphological investigations performed revealed the morphologicalstructure of the film. The absorbance of the film for various region of the electromagneticspectrum was observed. The optical absorbance was found to reduce with increase inwavelength. The optical band gap a ranges from 1.26 – 2.00ev with sample P(15) having thelowest direct band gap.