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Title: The two-phase region in 2(ZnSe) {sub x} (CuInSe{sub 2}){sub 1-} {sub x} alloys and structural relation between the tetragonal and cubic phases

Abstract

The two-phase region in the system 2(ZnSe) {sub x} (CuInSe{sub 2}){sub 1-} {sub x} covers the chemical composition range 0.10<x{<=}0.36, in which a tetragonal and a cubic phase are coexisting. The structural relation between both phases was determined by selected area diffraction (SAD) and transmission electron microscopy (TEM). Both crystal structures are very similar and the extremely small mismatch of the lattice constants of the tetragonal phase and the embedding cubic matrix phase allows for the grain boundaries to be virtually strain-free and, therefore, without notable dislocations. The tetragonal phase forms grains of flat discus-like shape in the ambient cubic matrix, with the short discus axis parallel to the tetragonal c-axis. TEM experiments proved that the discus-shaped tetragonal particles are collinear with the (100){sub cub}, (010){sub cub} and (001){sub cub} planes of the cubic phase. Cooling and annealing experiments revealed a near-equilibrium state only to be realized for small cooling rates less than 2 K/h and/or for a long-time annealing with subsequent rapid quenching. Only then there will be no cation ordering in both, the tetragonal domains and the parental cubic matrix phase. If, however, the samples are kept in a state far away from the equilibrium condition both phasesmore » reveal Stannite-type cation ordering. Within the composition range of 0{<=}x{<=}0.10 only tetragonal 2(ZnSe) {sub x} (CuInSe{sub 2}){sub 1-} {sub x} -alloys exist. At concentration rates above 36 mol% 2(ZnSe) only cubic structured solid solutions of ZnSe and CuInSe{sub 2} are found to be stable. However, in the range 36 mol% to about 60 mol% 2(ZnSe) tiny precipitates with Stannite-like structure exist, too.« less

Authors:
 [1];  [2];  [2];  [3];  [2]
  1. Institute of Mineralogy, Crystallography and Materials Science, University of Leipzig, Scharnhorststr. 20, 04275 Leipzig (Germany). E-mail: wagner@chemie.uni-leipzig.de
  2. Institute of Mineralogy, Crystallography and Materials Science, University of Leipzig, Scharnhorststr. 20, 04275 Leipzig (Germany)
  3. Faculty for Physics and Earth Science, Nuclear Solid State Physics, University of Leipzig, Linnestr. 5, D-04103 Leipzig (Germany)
Publication Date:
OSTI Identifier:
20784807
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 178; Journal Issue: 12; Other Information: DOI: 10.1016/j.jssc.2005.09.009; PII: S0022-4596(05)00412-3; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANNEALING; COPPER SELENIDES; CUBIC LATTICES; DISLOCATIONS; GRAIN BOUNDARIES; INDIUM SELENIDES; LATTICE PARAMETERS; PHASE DIAGRAMS; SOLID SOLUTIONS; TETRAGONAL LATTICES; TRANSMISSION ELECTRON MICROSCOPY; ZINC SELENIDES

Citation Formats

Wagner, G., Lehmann, S., Schorr, S., Spemann, D., and Doering, Th. The two-phase region in 2(ZnSe) {sub x} (CuInSe{sub 2}){sub 1-} {sub x} alloys and structural relation between the tetragonal and cubic phases. United States: N. p., 2005. Web. doi:10.1016/j.jssc.2005.09.009.
Wagner, G., Lehmann, S., Schorr, S., Spemann, D., & Doering, Th. The two-phase region in 2(ZnSe) {sub x} (CuInSe{sub 2}){sub 1-} {sub x} alloys and structural relation between the tetragonal and cubic phases. United States. doi:10.1016/j.jssc.2005.09.009.
Wagner, G., Lehmann, S., Schorr, S., Spemann, D., and Doering, Th. Thu . "The two-phase region in 2(ZnSe) {sub x} (CuInSe{sub 2}){sub 1-} {sub x} alloys and structural relation between the tetragonal and cubic phases". United States. doi:10.1016/j.jssc.2005.09.009.
@article{osti_20784807,
title = {The two-phase region in 2(ZnSe) {sub x} (CuInSe{sub 2}){sub 1-} {sub x} alloys and structural relation between the tetragonal and cubic phases},
author = {Wagner, G. and Lehmann, S. and Schorr, S. and Spemann, D. and Doering, Th.},
abstractNote = {The two-phase region in the system 2(ZnSe) {sub x} (CuInSe{sub 2}){sub 1-} {sub x} covers the chemical composition range 0.10<x{<=}0.36, in which a tetragonal and a cubic phase are coexisting. The structural relation between both phases was determined by selected area diffraction (SAD) and transmission electron microscopy (TEM). Both crystal structures are very similar and the extremely small mismatch of the lattice constants of the tetragonal phase and the embedding cubic matrix phase allows for the grain boundaries to be virtually strain-free and, therefore, without notable dislocations. The tetragonal phase forms grains of flat discus-like shape in the ambient cubic matrix, with the short discus axis parallel to the tetragonal c-axis. TEM experiments proved that the discus-shaped tetragonal particles are collinear with the (100){sub cub}, (010){sub cub} and (001){sub cub} planes of the cubic phase. Cooling and annealing experiments revealed a near-equilibrium state only to be realized for small cooling rates less than 2 K/h and/or for a long-time annealing with subsequent rapid quenching. Only then there will be no cation ordering in both, the tetragonal domains and the parental cubic matrix phase. If, however, the samples are kept in a state far away from the equilibrium condition both phases reveal Stannite-type cation ordering. Within the composition range of 0{<=}x{<=}0.10 only tetragonal 2(ZnSe) {sub x} (CuInSe{sub 2}){sub 1-} {sub x} -alloys exist. At concentration rates above 36 mol% 2(ZnSe) only cubic structured solid solutions of ZnSe and CuInSe{sub 2} are found to be stable. However, in the range 36 mol% to about 60 mol% 2(ZnSe) tiny precipitates with Stannite-like structure exist, too.},
doi = {10.1016/j.jssc.2005.09.009},
journal = {Journal of Solid State Chemistry},
number = 12,
volume = 178,
place = {United States},
year = {Thu Dec 15 00:00:00 EST 2005},
month = {Thu Dec 15 00:00:00 EST 2005}
}