The effect of non-stoichiometry on the implantation of ytterbium in cadmium telluride
- 1 January 1977
- journal article
- research article
- Published by Taylor & Francis in Radiation Effects
- Vol. 31 (2) , 107-115
- https://doi.org/10.1080/00337577708234787
Abstract
Cathodoluminescence emission at 77 K has been used to monitor the production of optically active Yb3+ centres by implantation of 50 W ytterbium ions into doped and undoped cadmium telluride samples of different degrees of non-stoichiometry. Isochronal annealing studies of the different types of implanted samples show that early stages of anneal produce Type I Yb3+ centres at interstitial sites and further annealing causes conversion of Type 1 Yb3+ centres to Type II Yb3+ centres which occur at substitutional sites. Efficient emission by Type I centres and efficient conversion of Type I to Type II centres is produced in those samples which have been shown by electrical measurements and edge emission studies to contain an excess of cadmium vacancies.Keywords
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