Kumar Gundam Sandeep, Sarkar Piyush Kanti, Pradhan Bapi, Hossain Mozakkar, Rao K D M, Acharya Somobrata
School of Applied & Interdisciplinary Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
Nanoscale Horiz. 2020 Apr 1;5(4):696-704. doi: 10.1039/c9nh00774a. Epub 2020 Jan 21.
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 (MAGuaPbI, 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 cm on flexible substrates with a transparency of ∼50% can be achieved with enriched environmental stability. Transparent photodetectors based on MAGuaPbI (x = 0.12) RPMs manifest excellent performance with a responsivity of 187 A W, a detectivity of 2.23 × 10 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.
揭示具有卓越光响应和环境稳定性的钙钛矿基光电探测器的透明度和灵活性仍然是一个悬而未决的挑战。在此，我们报道了使用超快速喷涂技术制备含胍金属卤化物钙钛矿（MAGuaPbI，x = 0至0.65）随机渗流微结构（RPM）。值得注意的是，在柔性基板上可实现大面积为5×5 cm且透明度约为50%的RPM，同时具有增强的环境稳定性。基于MAGuaPbI（x = 0.12）RPM的透明光电探测器表现出优异的性能，响应度为187 A/W，探测率为2.23×10 Jones，外量子效率为44115%。此外，该光电探测器在广泛的弯曲角度和大量的弯曲循环下表现出卓越的机械柔韧性。在一个光电探测器中集成透明度、高性能、稳定性、柔韧性和可扩展性等特性是无与伦比的，并且在透明和可穿戴光电器件的新应用方面具有潜力。
