Electronic Processes in Cd[In.sub.2][Te.sub.4] Crystals

The results of investigations of electrical, optical, and photoelectric properties of Cd[In.sub.2][Te.sub.4] crystals, which were grown by the Bridgman method are presented. It is shown that electrical conductivity is determined mainly by electrons with the effective mass [m.sub.n] = 0.44[m.sub.0] a...

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Bibliographic Details
Published inSemiconductors (Woodbury, N.Y.) Vol. 52; no. 8; p. 973
Main Authors Grushka, O.G, Chupyra, S.M, Bilichuk, S.V, Parfenyuk, O.A
Format Journal Article
LanguageEnglish
Published Springer 01.08.2018
Subjects
Electric properties
Electrical conductivity
Electrons
Ionization
Semiconductors (Materials)
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ISSN1063-7826
DOI10.1134/S1063782618080079

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Summary:The results of investigations of electrical, optical, and photoelectric properties of Cd[In.sub.2][Te.sub.4] crystals, which were grown by the Bridgman method are presented. It is shown that electrical conductivity is determined mainly by electrons with the effective mass [m.sub.n] = 0.44[m.sub.0] and the mobility 120-140 [cm.sup.2]/(V s), which weakly depends on temperature. Cd[In.sub.2][Te.sub.4] behaves as a partially compensated semiconductor with the donor-center ionization energy [E.sub.d] = 0.38 eV and the compensation level K = [N.sub.a]/[N.sub.d] = 0.36. The absorption-coefficient spectra at the energy hv < [E.sub.g] = 1.27 eV are subject to the Urbach rule with a typical energy of 18-25 meV. The photoconductivity depends on the sample thickness. The diffusion length, the charge-carrier lifetime, and the surface-recombination rate are determined from the photoconductivity spectra.
ISSN:1063-7826
DOI:10.1134/S1063782618080079