A new antimony-based organic-inorganic hybrid absorber with photoconductive response

作者：Khan, Asma; Han, Shiguo; Liu, Xitao; Tao, Kewen; Dey, Dhananjay; Luo, Junhua^*; Sun, Zhihua^*

来源：Inorganic Chemistry Frontiers, 2018, 5(12): 3028-3032.

DOI：10.1039/c8qi00902c

• HALIDE DOUBLE PEROVSKITE
• LEAD-FREE
• BISMUTH IODIDE
• OPTICAL-PROPERTIES
• CRYSTAL-STRUCTURE
• PERFORMANCE
• TIN
• EMISSION
• LAYERS

Organic-inorganic hybrid perovskites (most notably CH3NH3PbI3) have recently been demonstrated as high-performance and low cost hybrid materials for photovoltaic application because of their prominent light-absorbing capacity and excellent optoelectronic properties. However, some serious concerns, including the potential toxicity of lead and chemical/phase instability of such hybrid perovskites, have become bottlenecks for their commercialization. In this study, through utilizing an alternative trivalent cation Sb3+ with the ns(2)np(0) electronic configuration, we designed a new lead-free hybrid material, [tert-butylammonium](4)[Sb4I16]2H(2)O (1), which adopts a zero-dimensional architecture consisting of corner-sharing SbI6 octahedra. It is noteworthy that 1 shows evident light-absorbance with a narrow optical bandgap of approximate to 2.06 eV, along with positive temperature-dependent conductivity and notable photo-conductive response. Moreover, 1 displays phase stability under ambient conditions, which is superior to that of CH3NH3PbI3. The obtained results suggest the potential of 1 as a light absorbing material for photovoltaic applications.

• 出版日期2018-12-1
• 单位中国科学院大学; 中国科学院福建物质结构研究所