UBC Theses and Dissertations

UBC Theses Logo

UBC Theses and Dissertations

Optical absorption and photoconductivity in magnesium oxide crystals Peria, William Thomas

Abstract

The purpose of this investigation was the determination of the nature of certain imperfections in magnesium oxide crystals. Optical absorption and photoconductivity spectra of specimens cleaved from a number of larger pieces were measured. The effects of vacuum heating, of non-stoichiometry and of ultraviolet and X-ray irradiation were investigated. The nature of the imperfections could not be inferred from the experimental results but an energy level diagram consistent with all the data has been deduced. A comparison of the present work with pertinent data from the literature is presented and a basic error in previous photoconductivity measurements is pointed out. A method for the determination of the sign of the charge carriers excited during photoconductivity measurements is described.

Item Media

Item Citations and Data

Rights

For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.

Usage Statistics