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Issue 3, 2019
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Air-stable lead-free hybrid perovskite employing self-powered photodetection with an electron/hole-conductor-free device geometry

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Abstract

In this study, we have demonstrated the fabrication of one of the few lead-free perovskite photodetectors reported to date. In particular, we fabricated the photodetector based on a methylammonium bismuth iodide, MA3Bi2I9 (MABI), structure that works under a self-powered mode of operation. The optoelectronic properties of the photodetector were investigated systematically. The photoresponse of the photodetector was carefully studied and compared with the literature, which demonstrated the capability of the MABI structure for detecting light at a very low incident irradiance of 10 μW cm−2. Also, it exhibited a fast and reproducible response speed along with high photosensitivity (∼105) and detectivity (∼1012 Jones) at low operating voltages (0 V and 0.8 V) through the large effective device area. It was also revealed that the MABI photodetector had good stability after storage for two months at ambient conditions. It is therefore concluded that our photodetector fabricated with a MABI perovskite structure using a simple geometry has great potential to further improve the optoelectronic properties when proper electron/hole-transporting layers are fused for proper charge extraction. This will have significant benefits for next-generation cost-competitive optoelectronic technology to address the scalability issue.

Graphical abstract: Air-stable lead-free hybrid perovskite employing self-powered photodetection with an electron/hole-conductor-free device geometry

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Publication details

The article was received on 06 Nov 2018, accepted on 16 Dec 2018 and first published on 17 Dec 2018


Article type: Paper
DOI: 10.1039/C8NR08959K
Nanoscale, 2019,11, 1217-1227

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    Air-stable lead-free hybrid perovskite employing self-powered photodetection with an electron/hole-conductor-free device geometry

    A. A. Hussain, A. K. Rana and M. Ranjan, Nanoscale, 2019, 11, 1217
    DOI: 10.1039/C8NR08959K

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