Optical Properties of NiO Thin Films: A Potential Material for Optoelectronic Devices

Abstract:

Article Preview

The influence of substrate temperature on the UV-Visible-near-IR optical properties, namely the band gap, the Urbach energy and the refractive index of NiO thin films deposited by RF sputtering has been investigated. The optical band gap of thin films showed the blue-shift in the transmission spectra with increase in the substrate temperature which is related to variation in carrier concentration of the deposited films. Urbach energy (EU) values indicate that the films deposited at 400 oC substrate temperature show least structural disorder. The refractive index of the films is found to decrease continuously with increase in the substrate temperature at all photon energies in the visible and near-IR region, and is attributed to the decreasing packing density of the films. Introduction

Info:

Periodical:

Advanced Materials Research (Volumes 488-489)

Edited by:

Wu Fan

Pages:

103-108

Citation:

M. Tyagi et al., "Optical Properties of NiO Thin Films: A Potential Material for Optoelectronic Devices", Advanced Materials Research, Vols. 488-489, pp. 103-108, 2012

Online since:

March 2012

Export:

Price:

$38.00

[1] H. Ohta, K. Kawamura, M. Orita, M. Hirano, N. Sarukura, and H. Hosono, Applied Physics Letters 77, 475 (2000).

[2] H. Ohta, M. Hirano, K. Nakahara, H. Maruta, T. Tanabe, M. Kamiya, T. Kamiya, and H. Hosono, Applied Physics Letters 83, 1029 (2003).

[3] S. Saha, M. Tomar, V. Gupta, Journal of applied physics, Article in press (2011).

[4] B. S. Chun, H. C. Wu, M. Abid, I. C. Chu, S. Serrano-Guisan, I. V. Shvets, and D. S. Choi, Applied Physics Letters 97, 082109 (2010).

[5] Y.M. Lu, W.S. Hwang, J.S. Yang, Surface Coating Technology 155, 231 (2002).

[6] V. Gupta, A. Mansingh, Journal of Applied Physics 80, 1063 (1996).

[7] R. B. Bennett, A. R. Soref, A. J. Del alamo, IEEE Journal of Quantum Electronics, 26 (no. i), 113 (1990).

[8] D. Severin, O. Kappertz, T. Nyberg, S. Berg, and M. Wuttig, Thin Solid Films 515, 3554(2007).

[9] N.A. Subrahamanyam, A Textbook of Optics, 9th ed., Brj Laboratory, India, (1977).

Fetching data from Crossref.
This may take some time to load.