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

fYear

2011

fDate

28-30 Nov. 2011

Firstpage

107

Lastpage

109

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanoscience, Engineering and Technology (ICONSET), 2011 International Conference on

Conference_Location

Chennai

Print_ISBN

978-1-4673-0071-1

Type

conf

DOI

10.1109/ICONSET.2011.6167923

Filename

6167923