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Issue 4, 2020
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Large-area transparent flexible guanidinium incorporated MAPbI3 microstructures for high-performance photodetectors with enhanced stability

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Abstract

Unveiling the transparency and flexibility in perovskite-based photodetectors with superior photoresponse and environmental stability remains an open challenge. Here we report on guanidinium incorporated metal halide perovskite (MA1−xGuaxPbI3, x = 0 to 0.65) random percolative microstructure (RPM) fabrication using an ultra-fast spray coating technique. Remarkably, RPMs over a large area of 5 × 5 cm2 on flexible substrates with a transparency of ∼50% can be achieved with enriched environmental stability. Transparent photodetectors based on MA1−xGuaxPbI3 (x = 0.12) RPMs manifest excellent performance with a responsivity of 187 A W−1, a detectivity of 2.23 × 1012 Jones and an external quantum efficiency of 44 115%. Additionally, the photodetectors exhibited superior mechanical flexibility under a wide range of bending angles and large number of binding cycles. Integrating features including transparency, high performance, stability, flexibility and scalability within a photodetector is unmatched and holds potential for novel applications in transparent and wearable optoelectronic devices.

Graphical abstract: Large-area transparent flexible guanidinium incorporated MAPbI3 microstructures for high-performance photodetectors with enhanced stability

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Supplementary files

Article information


Submitted
10 Dec 2019
Accepted
14 Jan 2020
First published
17 Jan 2020

Nanoscale Horiz., 2020,5, 696-704
Article type
Communication

Large-area transparent flexible guanidinium incorporated MAPbI3 microstructures for high-performance photodetectors with enhanced stability

G. S. Kumar, P. K. Sarkar, B. Pradhan, M. Hossain, K. D. M. Rao and S. Acharya, Nanoscale Horiz., 2020, 5, 696
DOI: 10.1039/C9NH00774A

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