A structural property study on the role of Sm ions in nano-textured Zn (1-x)Sm x O thin films for green emission

P. Ilanchezhiyan, G. Mohan Kumar, S. Suresh, Tae Won Kang, R. Jayavel

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Sm doped ZnO nanocrystalline textures were deposited through pyrolytic reactions on preheated glass substrates to tune the green emissions from the wurtzite matrix. The textures were found to be well-defined, possessing grain like morphology; with their dimensional parameters depending on the level of Sm substitution. The films were then characterized using several analytic techniques to establish the origin of their green emissions. The structural data obtained using the 2θ plots revealed the polycrystalline nature of the species and their preferred orientation along (002) plane. The morphology studies revealed a gradual decrease in grain size, while increasing the Sm composition. Their evolution has been correlated with the heterogeneous nucleation taking place on the surface of the substrate. The role of defects and crystallinity of the Zn1-xSmxO has been explained using Raman spectroscopy. Taucs plot revealed a red shift in the optical energy band gap of the species, while the luminescence spectra illustrated the enhancement of green emissions.

Original languageEnglish
Pages (from-to)2796-2802
Number of pages7
JournalJournal of Materials Science: Materials in Electronics
Volume24
Issue number8
DOIs
StatePublished - Aug 2013

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