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Oral Poster

Zero-dimensional(CH3NH3)3Bi2I9 perovskiteforoptoelectronic applications

Tuesday (27.09.2016)
12:03 - 12:06
Part of:

Recently organic-inorganic hybrid perovskite solar cells have shown tremendous potential for solar

energy harvesting applications. Since its discovery in 2009 by Miyasaka et al., power conversion efficiencies

skyrocketed beyond 20% in liquid electrolyte-free solid state devices within only 5 years of extensive research

worldwide. A major drawback of the currently best performing solar cells lies in their chemical composition, namely the

lead content. The toxicity of lead containing compounds remains a huge obstacle for commercialization. Although lead

analogues 3D tin perovskite CH3NH3SnI3 thin films were already successfully integrated into devices with moderate

power conversion efficiencies (PCE~ 6%) by H. Snaith et al., stability issues became even more demanding in

comparison to the air and moisture sensitive lead perovskite. In an attempt to replace lead by a non-toxic metal,

organic-inorganic bismuth halide perovskite sheets were prepared via spin-coating technique. Solid state (CH3NH3)3

Bi2I9 heterojunction devices were assembled by solution processing and their J-V characteristics were recorded

under simulated sunlight conditions. A comprehensive investigation of the physicochemical properties of the (CH3NH3

)3Bi2I9 sheets was performed by means of SEM, XRD, UV-VIS, PDS, XPS, UPS, PL, DFT, TDDFT and Raman


Senol Öz
University of Cologne
Additional Authors:
  • Jan-Christoph Hebig
    Forschungszentrum Jülich
  • Eunhwan Jung
    University of Cologne
  • Dr. Trilok Singh
    University of Cologne
  • Asish Lepcha
    University of Cologne
  • Dr. Selina Olthof
    University of Cologne
  • Yajun Gao
    University of Cologne
  • Raphael German
    University of Cologne
  • Prof. Dr. Paul H.M. van Loosdrecht
    University of Cologne
  • Prof. Dr. Thomas Kirchartz
    Forschungszentrum Jülich
  • Prof. Dr. Klaus Meerholz
    University of Cologne
  • Prof. Dr. Sanjay Mathur
    University of Cologne