Title :
Effect of temperature on Photoluminescence properties of ZnO/mesoporus silica nanocomposite
Author :
Babu, K. Sowri ; Reddy, A. Ramamohan ; Sujatha, Ch ; Reddy, K. Venugopal
Author_Institution :
Dept. of Phys., Nat. Inst. of Technol., Warangal, India
Abstract :
This paper reports on Photoluminesceiice (PL) properties of ZnO nanoparticles incorporated in mesoporous silica matrix (MPS). The effect of temperature and annealing times on photoluminescence properties of ZnO/ MPS nanocomposite were studied. The strong UV emission at 363 nm from the sample annealed in oxygen atmosphere at 550°C indicates the formation of very small ZnO nanoparticles. The sample shows blue-green emission band when annealed at 300°C for three hours. The increase in annealing time to 5h turns the blue-green PL band to blue band and further increase in annealing time causes the increase in intensity without any shift. Quenching of blue emission at high temperatures is observed.
Keywords :
II-VI semiconductors; annealing; mesoporous materials; nanocomposites; nanoparticles; photoluminescence; silicon compounds; ultraviolet spectra; wide band gap semiconductors; zinc compounds; UV emission; ZnO-SiO2; annealing; blue band; blue-green PL band; blue-green emission band; mesoporous silica matrix; nanoparticle; oxygen atmosphere; photoluminescence; quenching; temperature 300 degC to 550 degC; time 3 h to 5 h; zinc oxide-mesoporus silica nanocomposite; Annealing; Nanobioscience; Zinc oxide; ZnO; annealing; blue luminescence; mesoporous silica; semiconductor;
Conference_Titel :
Nanoscience, Engineering and Technology (ICONSET), 2011 International Conference on
Conference_Location :
Chennai
Print_ISBN :
978-1-4673-0071-1
DOI :
10.1109/ICONSET.2011.6167923
