Recombination mechanisms in p-type HgCdTe: Freezeout and background flux effects

S. E. Schacham, E. Finkman

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The recombination mechanisms in HgCdTe are analyzed. Detailed expressions for the radiative lifetime are presented, taking into account recent measurements of the absorption coefficient. In p-type material, carrier freezeout is shown to increase the lifetime exponentially for the radiative and the Auger processes at low temperatures. The effect of background flux is introduced, taking into account its variation with temperature due to the change in energy gap. Lifetime measurements on p-type samples are in good agreement with combined Auger 7 and radiative mechanisms, where the Auger process is more effective for low x values. Highly compensated materials are dominated by the Shockley-Read recombination. For all samples, the intrinsic region is controlled entirely by the Auger process.

Original languageEnglish
Pages (from-to)2001-2009
Number of pages9
JournalJournal of Applied Physics
Issue number6
StatePublished - 1985
Externally publishedYes


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