Lead free Bismuth based Perovskite for Optoelectronic Applications
Ashish Kulkarni a, Trilok Singh a, Tsutomu Miyasaka a
a Toin University of Yokohama, 1614 Kurogane-cho, Aoba, Yokohama, 2258503, Japan
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Yokohama-shi, Japan, 2017 February 2nd - 4th
Organizers: Tsutomu Miyasaka and Iván Mora-Seró
Poster, Ashish Kulkarni, 042
Publication date: 7th November 2016

Lead halide based organic-inorganic perovskite semiconductors (CH3NH3PbX3, X = Br, I, Cl) have gained great attention as potential light harvesting material in thin-film photovoltaics due to its promising light-absorption characteristics, charge-transport dynamics and simple solution processibility. Recently, using lead based perovskite, worldwide research efforts have led to an incredible enhancement in power conversion efficiencies up to 22.1%. However, these mentioned devices suffer from the relatively poor stability in air and moisture, and more importantly the toxicity of lead is an obstacle for further commercialization. Lead-free perovskite materials such as Sn or Ge based solar cells have been shown to exhibit moderate performances. However, Sn and Ge based devices suffer from serious problems such as toxicity when exposed to environment and in particular stability against moisture.This presentation will discuss the possibility to replace lead by a non-toxic bismuth based light absorbing perovskite material, its physiochemical, optoelectronic properties and suitability for the futuristic solar cells in planar/meso heterojunction architecture. Furthermore, the present talk will also focus on the effect of tuning the morphology of MIB perovskite, by bringing in N-methyl-2-pyrrolidone (NMP) as a morphology controller under different operating conditions, on device parameters and thereby its effect on device performance.

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