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High temperature electrical conductivity in ZnSe:In and in CdSe:In under selenium vapor pressure
Author(s) -
Lott K.,
Shinkarenko S.,
Volobujeva O.,
Türn L.,
Nirk T.,
Öpik A.,
Nisumaa R.,
Kallavus U.,
Nõges M.,
Mikli V.,
Viljus M.,
Gorokhova E.,
Anan'eva G.,
Grebennik A.,
Vishnjakov A.
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200675117
Subject(s) - isobar , vacancy defect , selenium , conductivity , ionization , cadmium , electrical resistivity and conductivity , cadmium selenide , zinc , chemistry , doping , analytical chemistry (journal) , ionization energy , activation energy , vapor pressure , materials science , atomic physics , nanotechnology , metallurgy , crystallography , optoelectronics , ion , physics , environmental chemistry , nucleon , organic chemistry , quantum mechanics , quantum dot
High temperature electrical conductivity (HTEC) isotherms and isobars of ZnSe:In and of CdSe:In are compared. There are differencies in In‐doping mechanisms of II–VI compounds. When HTEC isotherms and isobars of ZnSe:In and of CdSe:In, measured under metal component vapour pressure give both n‐type conductivity then differences appear in the results of measurements under the selenium vapor pressure ( p Se 2). ZnSe:In isotherms in the last case are characterized by the conductivity type conversion but no such drastic change of HTEC type is observed on CdSe:In isotherms. Under the conditions of p Se 2, the activation energy of HTEC isobars for ZnSe:In is Δ E ≈ 1.3–1.6 eV and for CdSe:In is Δ E ≈ 1.2 eV. The onefold ionized substitutional In at Zn place is proposed to be compensated by native defects in ZnS:In and in CdSe:In under high p Se 2. This native defect may be onefold ionized zinc vacancy for ZnSe:In and twofold ionized cadmium vacancy for CdSe:In. Association of defects occur at lower temperatures. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)