Synthesis and physical properties of solar material Cu1+xIn1-xSe2

✍ Scribed by Zheng, Shiyou ;Wang, Yaoming ;Huang, Fuqiang

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 406 KB
• Volume: 208
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.201000074

✦ Synopsis

Abstract

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. magnified image