"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Optical characterization of the Bi2O3, TiO2 and MnO2 doped ZnO Ceramics

ZAHID RIZWAN1,* , AZMI ZAKARIA1, M. G. M. SABRI1, FASHI UD DIN1

Affiliation

  1. Department of Physics, Faculty of Science, University Putra Malaysia, 43400 Serdang, Selangor D. E., Malaysia

Abstract

Photopyroelectric (PPE) spectroscopy was used to study the optical band-gap energy (Eg) of the ceramic ZnO doped with 0.5MnO2. xBi2O3 and xTiO2 sintered at 1270oC for one to four hours. The wavelength of incident light from 300 to 800 nm, modulated at 9 Hz, was used and PPE spectrum with reference to the doping level and sintering time was discussed. The optical band-gap energy (Eg) was determined from the plot ( ) vs and found that the Eg decreased to the lowest value of 2.13 eV with x = 1.8 mol% at four hour sintering time. Steepness factor (in region-A) and steepness factor (in region-B) which characterizes the slope of exponential optical absorption was discussed with reference to the variation in the value of Eg. XRD, SEM and EDAX were used for the characterization of the ceramic. Relative density and grain size is also discussed..

Keywords

Photopyroelectric Spectroscopy, Bi2O3 , TiO2, MnO2, ZnO, Varistor.

Submitted at: July 16, 2010
Accepted at: April 11, 2011

Citation

ZAHID RIZWAN, AZMI ZAKARIA, M. G. M. SABRI, FASHI UD DIN, Optical characterization of the Bi2O3, TiO2 and MnO2 doped ZnO Ceramics, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 4, pp. 395-398 (2011)