Optical characterization of In2S3–SiO2 nanocomposite thin films synthesized by sol–gel technique

✍ Scribed by S. Gorai; S. Chaudhuri

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 321 KB
• Volume: 126
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2005.08.109

✦ Synopsis

In 2 S 3 -SiO 2 nanocomposite films (with molar ratios of In 2 S 3 :SiO 2 = 15:85, 10:90 and 5:95) were prepared on quartz substrates by sol-gel method. Highly confined nanoparticles of In 2 S 3 (radius ∼ 1.8-7 nm) were obtained in SiO 2 matrix, indicating SiO 2 to be a good capping agent for the nanoparticles. The films were annealed in air at different temperatures (473-623 K) and characterized by optical, microstructural and photoluminescence measurements. XRD studies showed that annealing in air upto 623 K leads to the formation of oxide free In 2 S 3 nanoparticles. The broad Photoluminescence peak observed at ∼353 nm showed a marked blue shift associated with a decrease in intensity with increasing concentration of In 2 S 3 in the matrix.