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Investigations on the structural and optical properties of Li, N and (Li, N) co-doped ZnO thin films prepared by sol–gel technique

✍ Scribed by C. Ravichandran; G. Srinivasan; Craig Lennon; S. Sivanathan; J. Kumar

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
172 KB
Volume
13
Category
Article
ISSN
1369-8001

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✦ Synopsis

Pure and doped zinc oxide thin films have been deposited on sapphire substrates by using the sol-gel method and spin coating technique. The X-ray diffraction pattern showed that the deposited films exhibit hexagonal zinc oxide structure. Room temperature photoluminescence measurements show the presence of two emission bands. The predominant near band edge ultraviolet emission is at 3.28 eV and a suppressed broad band of deep level emission in the range of 2.1-2.5 eV. The incorporation of nitrogen is indicative of p-type behavior as observed from X-ray photoelectron spectrum of nitrogen in the doped samples. The p-type conduction of Li, N:ZnO may be attributed to the formation of a LiZn-N complex acceptor.

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