University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Defect properties of bulk and thin film PbTe.

Sealy, B. J. (1972) Defect properties of bulk and thin film PbTe. Doctoral thesis, University of Surrey (United Kingdom)..

[img]
Preview
Text
10148871.pdf
Available under License Creative Commons Attribution Non-commercial Share Alike.

Download (7MB) | Preview

Abstract

The properties of the lead ohaloogenide group of semiconductors and more specifically of PbTe, have been investigated in order to predict, and control the growth of thin epitaxial films for use as thin film field effect transistors. The thermodynamic properties of binary compounds has been analysed in detail and used to explain the defect properties of PbTe and PbSe. The calculated pressure-temperature-composition (or P-T-x) phase diagram for PbTe was compared with "as grown" and annealed epitaxial film properties (grown on mica substrates) to discover whether films obeyed bulk thermodynamics. "As grown" films appear to be metastable, i.e. their composition, estimated from electrical properties, suggests that they lie outside the phase boundary at the substrate temperatures employed (200-300°C). Changes occur on annealing in vacuo which suggest that the films tend toward the thermodynamic equilibrium state represented, by the calculated bulk P-T-x phase diagram. An investigation of the electrical properties of ternary solid solutions of group IX elements with PbTe and PbSe has been carried out in the hope of producing an improved semiconductor material compared with PbTe and PbSe. A correlation of electrical properties with film structure, obtained from replication and transmission elctron microscopy, was attempted producing a number of useful and interesting conclusions.

Item Type: Thesis (Doctoral)
Divisions : Theses
Authors :
NameEmailORCID
Sealy, B. J.
Date : 1972
Contributors :
ContributionNameEmailORCID
http://www.loc.gov/loc.terms/relators/THS
Depositing User : EPrints Services
Date Deposited : 09 Nov 2017 12:18
Last Modified : 20 Jun 2018 11:41
URI: http://epubs.surrey.ac.uk/id/eprint/844389

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800