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On the optical properties of heat-treated multilayered Zn/In thin films

G. G. RUSU1, A. P. RÂMBU1, M. RUSU1,*

Affiliation

  1. “Al.I. Cuza” University, 11 Carol I Bd., 700506 Iasi, Romania

Abstract

Zn/In multilayered thin films (d = 70 – 110 nm) were deposited in vacuum onto unheated glass substrates, by staked layer technique. Metallic Zn and In were evaporated from independent and separated between them sources, maintained at 723 K for Zn and 570 K for In, respectively, during deposition. After preparation, the samples were heat-treated by annealing in air with a rate of 12 K/min from room temperature to 550 K. The as deposited samples present a polycrystalline hexagonal Zn (002) textured structure. The heat-treatment determines the formation of the hexagonal ZnO structure with highly (002) oriented crystallites. The optical transmittance in the wavelength range 380-1400 nm of the treated samples is about 85%. The optical band gap for respective samples is 3.18 eV..

Keywords

Multilayered film, Optical properties, XRD, SEM.

Submitted at: Sept. 25, 2007
Accepted at: Feb. 18, 2008

Citation

G. G. RUSU, A. P. RÂMBU, M. RUSU, On the optical properties of heat-treated multilayered Zn/In thin films, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 339-343 (2008)