Author:

Keywords:

Science & Technology, Physical Sciences, Technology, Chemistry, Physical, Nanoscience & Nanotechnology, Materials Science, Multidisciplinary, Chemistry, Science & Technology - Other Topics, Materials Science, PEROVSKITE SOLAR-CELLS, LEAD IODIDE PEROVSKITES, LIGHT-EMITTING-DIODES, RECENT PROGRESS, HIGH-EFFICIENCY, MIXED CATIONS, METHYLAMMONIUM, GROWTH, 3403 Macromolecular and materials chemistry, 4016 Materials engineering, 4018 Nanotechnology

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.