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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14526
Title: Temperature dependent optical properties of UV emitting γ-CuCl thin films
Authors: Natarajan G.
Mitra, Anirban
Daniels S.
Cameron D.C.
McNally P.J.
Published in: Thin Solid Films
Abstract: In this work, ultra violet emitting properties of RF sputtered CuCl thin films were studied as a function of temperature in the region of 15-300 K. Deposition parameters were optimised to obtain good optical quality films exhibiting an intense and sharp Z3 free exciton emission (at 383 nm) with an FWHM of ∼ 74 meV at room temperature. At lower temperatures, there are two other emissions observed at 375 and 390 nm, and they are identified as Z12 and I1 exciton lines, respectively. The free exciton emission is extremely stable at room temperature and it was found to be less influenced by the exciton-phonon interaction compared to the bound exciton emission which dissociates after 40 K. The Z3 free exciton line exhibits a slight blue-shift on increasing the temperature. The temperature dependence of exciton line shift, line broadening and emission intensity are discussed in detail. © 2007 Elsevier B.V. All rights reserved.
Citation: Thin Solid Films (2008), 516(7): 1439-1442
URI: https://doi.org/10.1016/j.tsf.2007.03.069
http://repository.iitr.ac.in/handle/123456789/14526
Issue Date: 2008
Keywords: CuCl thin film
Photoluminescence
RF sputtering
UV optoelectronics
ISSN: 406090
Author Scopus IDs: 7004035980
57209787039
8842395600
26643140300
7102317773
Author Affiliations: Natarajan, G., Nanomaterials Processing Laboratory (NPL), School of Electronic Engineering, Dublin City University, Dublin, 9, Ireland
Mitra, A., Nanomaterials Processing Laboratory (NPL), School of Electronic Engineering, Dublin City University, Dublin, 9, Ireland
Daniels, S., Nanomaterials Processing Laboratory (NPL), School of Electronic Engineering, Dublin City University, Dublin, 9, Ireland
Cameron, D.C., Advanced Surface Technology Research Laboratory (ASTRaL), Lappeenranta University of Technology, 50101 Mikkeli, Finland
McNally, P.J., Nanomaterials Processing Laboratory (NPL), School of Electronic Engineering, Dublin City University, Dublin, 9, Ireland
Funding Details: One of the authors (G.N.) would like to thank Dr. R. T. Rajendra Kumar for his valuable discussions and Mr. Billy Roarty for his technical support. This project is funded by the Irish Research Council for Science Engineering and Technology (IRCSET), grant number SC/02/7.
Corresponding Author: Natarajan, G.; Nanomaterials Processing Laboratory (NPL), School of Electronic Engineering, Dublin City University, Dublin, 9, Ireland; email: gomathi.natarajan2@mail.dcu.ie
Appears in Collections:Journal Publications [PH]

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