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High‐temperature thermoelectric properties of Cu 2 In 4 Te 7
Author(s) -
Plirdpring Theerayuth,
Kurosaki Ken,
Kosuga Atsuko,
Ishimaru Manabu,
Ohishi Yuji,
Muta Hiroaki,
Yamanaka Shinsuke
Publication year - 2012
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201206058
Subject(s) - seebeck coefficient , thermoelectric effect , electrical resistivity and conductivity , materials science , crystallite , thermal conductivity , figure of merit , analytical chemistry (journal) , copper , thermoelectric materials , condensed matter physics , metallurgy , chemistry , thermodynamics , physics , optoelectronics , composite material , chromatography , quantum mechanics
Cu 2 Ga 4 Te 7 has recently been reported to have a relatively high thermoelectric (TE) figure of merit ( ZT ). However, the TE properties of Cu 2 In 4 Te 7 , which has the same defect zinc‐blende structure as Cu 2 Ga 4 Te 7 , have been hardly investigated. Here, we demonstrate that Cu 2 In 4 Te 7 has relatively high ZT values that are similar to those of Cu 2 Ga 4 Te 7 . High‐density polycrystalline bulk samples of Cu 2 In 4 Te 7 were prepared and their electrical resistivity ( ϱ ), Seebeck coefficient ( S ), and thermal conductivity ( κ ) were measured. Cu 2 In 4 Te 7 has a maximum ZT of 0.3 at 700 K, with ϱ , S , and κ values of 62.1 × 10 –5 Ω m, 394 μV K –1 , and 0.61 W m –1 K –1 , respectively. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)