Reassessment of the assignment of the InM2+3+VM2+defect in CdTe and ternary II‐VI compounds

Autor:	J. C. Austin, Wm. C. Hughes, K. J. Price, B. K. Patnaik
Rok vydání:	1995
Předmět:	Crystallography Chemistry Impurity Vacancy defect Metal ions in aqueous solution Quadrupole Analytical chemistry General Physics and Astronomy chemistry.chemical_element Ternary operation Spectroscopy Indium Cadmium telluride photovoltaics
Zdroj:	Journal of Applied Physics. 78:1776-1781
ISSN:	1089-7550 0021-8979
Popis:	Previous perturbed angular correlation (PAC) spectroscopy measurements on the donor indium in CdTe and its alloys have revealed several defect complexes. One defect characterized by two sets of quadrupole interaction parameters, νQ=83 MHz, η=0.08 and νQ=92 MHz, η=0.08, was observed in Hg0.8Cd0.2Te (x=0.2 MCT) and attributed to the substitutional indium–metal vacancy complex InM2+3+VM2+. A defect characterized by νQ=61±1 MHz and asymmetry parameter η between 0 and 0.19 was seen in CdTe and widely attributed to the same complex. Both of these assignments were based mainly on an observed relationship between complex formation and the loss of metal ions. In this article we present PAC measurements on 111In‐doped x=0.45 MCT (Hg0.55Cd0.45Te). These measurements reveal defects having quadrupole interactions very similar to those seen previously in CdTe and in x=0.2 MCT. Two unique defect fractions f1 and f2, characterized by νQ1=60±3 MHz, η1≊0–0.2, and νQ2=87±4 MHz, η2≊0–0.15, were seen in x=0.45 MCT, in some ca...
Databáze:	OpenAIRE
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