Vacancy defects in as-grown and neutron irradiated GaP studied by positrons

Dlubek, G.; Brümmer, O.; Polity, A.
August 1986
Applied Physics Letters;8/18/1986, Vol. 49 Issue 7, p385
Academic Journal
Positron lifetime and Doppler-broadening measurements have been used to study vacancy defects in n-type GaP. Vacancies in the P sublattice with a concentration of some 1017 cm-3 were observed in as-grwon GaP. The vacancies disappear during annealing at 500–800 °C. In neutron-irradiated GaP positrons are trapped by Ga vacancies which anneal out in two stages situated at 300–550 °C and 550–700 °C.


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