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Synthesis and physical properties of solar material Cu 1+ x In 1‐ x Se 2
Author(s) -
Zheng Shiyou,
Wang Yaoming,
Huang Fuqiang
Publication year - 2011
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201000074
Subject(s) - seebeck coefficient , materials science , electrical resistivity and conductivity , band gap , analytical chemistry (journal) , doping , crystal structure , absorbance , thermoelectric effect , thermal stability , mineralogy , thermal conductivity , crystallography , chemistry , optoelectronics , thermodynamics , composite material , chromatography , electrical engineering , engineering , physics , organic chemistry
Bulk samples of Cu 1+ x In 1‐ x Se 2 ( x = 0–0.5) have been prepared by solid‐state reaction method at 1073 K. The crystal structure, thermal stability, optical absorbance and electrical properties were systematically studied. With the value x increasing from 0 to 0.5, the optical band gap is gradually reduced from 0.90 to 0.86 eV, moreover, the room temperature electrical conductivity has been greatly enhanced from 5 to 850 S/cm, but the Seebeck coefficient is slightly decreased from 80 to 57 µV/K even at 625 K. It is likely that lattice distortions, additional holes, and/or second phase introduced by Cu doping lead to these changes.