Ramamoorthy, K. and Sanjeeviraja, C. and Jayachandran, M. and Sankaranarayanan, K. and Misra, P. and Kukreja, L.M. (2006) Development of a novel high optical quality ZnO thin films by PLD for III–V opto-electronic devices. Current Applied Physics, 6 (1). pp. 103-108. ISSN 1567-1739

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Abstract

A novel highly transparent intrinsic zinc oxide (ZnO) thin films (without adding any dopants and annealing) were grown by pulsed laser deposition (PLD) technique using Johnson Matthey ‘‘specpure’’- grade ZnO pellets. The effects of substrate temperatures on zinc oxide thin film growth, optical transmission, absorption, reflection and photoluminescence properties were studied. As well as the feasibility of developing high quality transparent oxide thin films was also studied simultaneously. The optical transmission window of such obtained films, i.e., T% (max)P 95% is broader than those of other transparent conducting oxides such as indium tin oxide (ITO) and absolute rivals that of the most transparent conducting oxides (TCOs). Also as a novelty merit, we want to emphasize as a interesting, significant and novel physical effect that the average optical transmittance of ZnO thin films rivals that of the most transmittive TCO films reported to date for this conductivity level (of the order of 103 X�1 cm�1). Also this is the first time that we have applied these PLD prepared ZnO thin films to iso and hetero semiconductor–insulator–semiconductor (SIS) type solar cells as transparent conducting oxide (TCO) coatings. From optical studies, we know that the films were act as highly antireflective coatings. From photoluminescence study, we confirmed the purity and high electrical conductivity of the deposited thin films of ZnO. The optical parameter values for the films were calculated, tabulated and graphically emphasized. Supplementary studies on surface, electrical, structural and internal morphological properties of zinc oxide thin film growth correlated with optical transmission, absorption, reflection and photoluminescence properties gives added advantages to this work. We hope that surely these data should be helpful either as a scientific or technical basis in the semiconductor processing and technology.

Item Type:	Article
Uncontrolled Keywords:	Laser epitaxy; Semiconducting materials; Thin film structure and morphology; Optical materials; Solar cells
Subjects:	Electrochemical Materials Science
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	04 Apr 2012 05:46
Last Modified:	04 Apr 2012 05:46
URI:	http://cecri.csircentral.net/id/eprint/591

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