Title :
Zinc selenide (ZnSe) nanoparticles prepared by sol-gel method
Author :
Hutagalung, Sabar D. ; Loo, Siaw C.
Author_Institution :
Sch. of Mater. & Miner. Resources Eng., Univ. Sains Malaysia, Nibong Tebal
Abstract :
ZnSe nanoparticles embedded in SiO2 thin films were prepared by sol-gel method using zinc acetate dihydrate, selenic acid and TEOS as source materials. The ZnSe nanoparticles/SiO2 thin film composites were deposited on the glass substrate by dip coating technique. FESEM images show that morphology of embedded ZnSe nanoparticles affected by ZnSe/SiO2 molar ratio. The optical properties of thin film composite have been investigated via transmittance measurement in the UV-visible wavelength range. It was found that the optical transmission is decreases with increment of the ZnSe/SiO2 molar ratio. The highest transmission of 54.6% and the lowest of 36.7% were obtained for the samples with 6% and 14% ZnSe/SiO2 molar ratio, respectively. Further observation show that the optical transition in ZnSe/SiO2 thin film is direct transition with band gap energy in the range of 2.6 - 3.9 eV.
Keywords :
II-VI semiconductors; composite materials; nanoparticles; silicon compounds; sol-gel processing; thin films; ultraviolet spectra; visible spectra; zinc compounds; UV-visible wavelength range; ZnSe-SiO2; band gap energy; nanoparticles; optical properties; optical transition; optical transmission; sol-gel method; thin film composites; Dip coating; Glass; Morphology; Nanoparticles; Optical films; Optical materials; Sputtering; Substrates; Transistors; Zinc compounds; SiO2; ZnSe; nanoparticles; optical properties; sol-gel; thin films;
Conference_Titel :
Nanotechnology, 2007. IEEE-NANO 2007. 7th IEEE Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-0607-4
Electronic_ISBN :
978-1-4244-0608-1
DOI :
10.1109/NANO.2007.4601336
