• 文献标题:   Polymorphic Graphene-like Cuprous Germanosulfides with a High Cu-to-Ge Ratio and Low Band Gap
  • 文献类型:   Article
  • 作  者:   LIN QP, ZHANG ZY, BU XH, FENG PG
  • 作者关键词:  
  • 出版物名称:   INORGANIC CHEMISTRY
  • ISSN:   0020-1669 EI 1520-510X
  • 通讯作者地址:   Univ Calif Riverside
  • 被引频次:   8
  • DOI:   10.1021/ic502527g
  • 出版年:   2014

▎ 摘  要

Metal chalcogenides based on heterometallic Ge-Cu-S offer dual attractive features of lattice stabilization by high-valent Ge4+ and band gap engineering into solar region by low-valent Cu+. Herein via cationic amine intercalation, we present three new copper-rich materials with the Cu-to-Ge ratio as high as 3. Two different patterns of Cu-Ge-S distribution could be achieved within each honeycomb sheet. The decoration of such honeycomb sheet by -Cu-S- chain or self-coupling between two honeycomb sheets leads to two layer configurations with different thickness and band gaps. The band gap of these new phases (2.06-2.30 eV), tuned by the layer thickness and the Cu/Ge ratio, represents a significant red shift over known Cu-Ge-S phases with lower Cu/Ge ratios.