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Issue 16, 2017, Issue in Progress
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Photovoltaic enhancement of bismuth halide hybrid perovskite by N-methyl pyrrolidone-assisted morphology conversion

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Abstract

Low toxicity and highly stable methylammonium bismuth iodide (MBI) ((CH3NH3)3Bi2I9) as a solution-processable photovoltaic absorber produces hexagonal non-uniform morphology leading to poor interfacial contacts with the electron and hole transporting layers. Herein, we tuned the morphology of MBI perovskite by bringing in a small amount of N-methyl-2-pyrrolidone (NMP) as a morphology controller into the MBI–DMF solution. The incorporation of various concentrations of NMP into the precursor solution was found to control the rate of crystallization. An optimal low concentration of 2.5% NMP added to the MBI–DMF precursor solution showed a 50% enhancement in short-circuit current (Jsc). The device showed power conversion efficiencies up to 0.31% with high reproducibility. Moreover, the devices were quite stable when exposed to an ambient atmosphere (relative humidity of 50–60%) for 30 days.

Graphical abstract: Photovoltaic enhancement of bismuth halide hybrid perovskite by N-methyl pyrrolidone-assisted morphology conversion

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Publication details

The article was received on 14 Dec 2016, accepted on 24 Jan 2017 and first published on 31 Jan 2017


Article type: Paper
DOI: 10.1039/C6RA28190G
Citation: RSC Adv., 2017,7, 9456-9460
  • Open access: Creative Commons BY-NC license
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    Photovoltaic enhancement of bismuth halide hybrid perovskite by N-methyl pyrrolidone-assisted morphology conversion

    A. Kulkarni, T. Singh, M. Ikegami and T. Miyasaka, RSC Adv., 2017, 7, 9456
    DOI: 10.1039/C6RA28190G

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