Structural and ionic transport properties of some A2BX4 (A=Cu, B=Pb, Sn, X=Br, I) compounds.
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Date
1990
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Abstract
The compounds Cu2PbBr4, Cu2SnI4, and Cu2PbI4 have been synthesized as stable phases in the CuBr-PbBr2, CuI-SnI2, or CuI-PbI2 binary systems. Cu2PbBr4 is cubic (a0=9.170 A ̊), whereas Cu2SnI4 and Cu2PbI4 are hexagonal with a=9.050, c =9.706 A ̊, and a=8.064, c=15.128 A ̊, respectively. These materials are characterized mainly by a rather high anionic defect conductivity over the temperature range 20-270°C. The activation energy for the ionic defect mobility is 0.27 eV for Cu2PbBr4, 0.28 eV for Cu2SnI4 and 0.31 eV for Cu2PbI4
Description
Solid State Ionics, Volume 44, No 1–2, Pg:99–105
Keywords
CuBr-PbBr2 binary system, high anionic defect conductivity, ionic defect mobility, ionic transport properties, structural transport properties