Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (4): 358-364.doi: 10.15541/jim20150455

• Orginal Article • Previous Articles     Next Articles

p-type CuI Films Grown by Iodination of Copper and Their Application As Hole Transporting Layers for Inverted Perovskite Solar Cells

Chang LIU1(), Shuai YUAN2, Hai-Liang ZHANG2, Bing-Qiang CAO2(), Li-Li WU1(), Long-Wei YIN1   

  1. 1. School of Material Science and Engineering, Shandong University, Jinan 260061, China
    2. School of Material Science and Engineering, University of Jinan, Jinan 250022, China
  • Received:2015-09-28 Revised:2015-11-21 Online:2016-04-20 Published:2016-03-25
  • About author:LIU Chang. E-mail: liuchangsdu@foxmail.com
  • Supported by:
    National Natural Science Foundation of China (51472110);Shandong Provincial Natural Science Foundation (JQ201214, 2014ZRB01A47)

Abstract:

γ-phase copper iodide (γ-CuI) is a wide bandgap p-type semiconductor with a band gap of 3.1 eV, which is suitable for optoelectronic devices like light-emitting diodes and solar cells. A simple and convenient method of iodination of copper film to prepare CuI film was reported. The effects of iodination time, reaction temperature, and copper/iodine ratio on the transparent and conductive properties of CuI film were explored. CuI films with high transmittance over 75% in the visible range and low resistivity of 4.4×10-2 Ω·cm were grown under the optimized iodination time (30 min) and iodination temperature (120℃). The CuI films were adopted as hole transporting layers for CuI/CH3NH3PbI3/PCBM inverted planar perovskite solar cell and a maximum photovoltaic efficiency of 8.35% was obtained. The influences of the transparent and conductive properties of CuI films on the solar cell photovoltaic efficiency were also discussed.

Key words: CuI, iodination of copper, transparent and conductive property, inverted perovskite solar cell

CLC Number: 

  • O472