Enhancement in the optical transmittance of zno:al powders by si co-doping

Author

Hai Yan He ; Jian-ming Guo

Author_Institution

Key Lab. of Auxiliary Chem. & Technol. for Chem. Ind., Shaanxi Univ. of Sci. & Technol., Xi´an, China

Volume

6

Issue

8

fYear

2011

fDate

8/1/2011 12:00:00 AM

Firstpage

725

Lastpage

727

Abstract

(Al, Si)-codoped ZnO powders with a constant molar ratio of Zn:Al (99:1) and various molar ratios of Si:Al (0-0.02) were synthesised by a sol-gel process and characterised by X-ray diffraction, field emission scanning electron microscopy, and UV-vis and luminescent spectrophotometry. The experiments indicated that the powders had random orientation and a slightly larger average particle size that increased with increasing Si proportion. The Mo doping resulted in the enhancement of transmittance in the UV-visible light range and the widening of the bandgap. Optimal efficiency appeared at a molar ratio of Si:Al-0.01, and Si doping resulted in the formation of a new emission centre and the enhancement of the emissions in range of visible light.

Keywords

II-VI semiconductors; X-ray diffraction; aluminium; energy gap; field emission electron microscopy; luminescence; particle size; powders; scanning electron microscopy; semiconductor growth; silicon; sol-gel processing; spectrophotometry; ultraviolet spectra; visible spectra; wide band gap semiconductors; zinc compounds; FESEM; Mo doping; Si codoping; Si proportion; UV-vis spectrophotometry; UV-visible light range; X-ray diffraction; XRD; ZnO:Al powders; ZnO:Al,Si; average particle size; bandgap widening; emission centre formation; emission enhancement; field emission scanning electron microscopy; luminescent spectrophotometry; molar ratio; optical transmittance; optimal efficiency; random orientation; sol-gel process; transmittance enhancement;

fLanguage

English

Journal_Title

Micro & Nano Letters, IET

Publisher

iet

ISSN

1750-0443

Type

jour

DOI

10.1049/mnl.2011.0363

Filename

6013025