Effects of supersaturation on CdS film growth from dilute solutions on glass substrate in chemical bath deposition process

• Published in: Thin solid films 2008-03, Vol.516 (10), p.2823-2828
• Main Authors: Chen, Fuyi, Jie, Wanqi, Cai, Xiaomei
• Format: Article
• Language: English
• Subjects: Cadmium sulphide; Chemical bath deposition; Colloidal particle growth; Cross-disciplinary physics: materials science; rheology; Crystal microstructure; Exact sciences and technology; Growth from solutions; Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids); Materials science; Methods of crystal growth; physics of crystal growth; Methods of deposition of films and coatings; film growth and epitaxy; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Physics; Scanning electron microscopy; Theory and models of film growth
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2007.04.167

CdS films were prepared on a glass substrate and their growth was analyzed as a function of the supersaturation ratio in dilute solutions. Nanocrystalline CdS with a hexagonal (wurtzite) structure is present in the CdS films and aggregated into colloidal particles. The particle size increases from 117 nm to 357 nm when the relative supersaturation ratio ( S r) increases from 0.4 to 1.0, but particle size decreases to 149 nm and the absorption edge blue shifts from 488 nm to 456 nm when S r increases further to 4.0. The evolution of the CdS film is explained on the basis of the proposed growth kinetic model.