NDLI: Synthesis and optical characterization of ZnO and ZnO:Al nanocrystalline films obtained by the sol-gel dip-coating process

Content Provider	Springer Nature Link
Author	Bojorge, C. D. Cánepa, H. R. Gilabert, U. E. Silva, D. Dalchiele, E. A. Marotti, R. E.
Copyright Year	2007
Abstract	Zinc oxide is obtained by the sol-gel process. The precursor solution was deposited on quartz substrates by dip-coating. The as-deposited films are transformed into nanocrystalline pure or aluminium-doped ZnO after thermal treatment. The microstructure was studied by X-ray diffraction and the nanocrystallite size was estimated using Scherrer equation. The optical transmittance in the visible region is between 83 and 91%. A direct absorption edge is observed with bandgap energies between 3.27 and 3.31 eV for the undoped samples, and between 3.30 and 3.35 eV for the Al doped ZnO. These values correlate well with the nanocrystal sizes following two different laws for the undoped and doped samples, due to Moss-Burstein shift. The visible transmittance also increases for higher bandgap energies. The UV transmittance is greater than 50% due to the small thickness of the films, which for the undoped samples is proportional to the number of layers.
Starting Page	1119
Ending Page	1125
Page Count	7
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	18
Issue Number	11
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2007-05-10
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Characterization and Evaluation of Materials Optical and Electronic Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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