Ferro-Pyro-Phototronic Effect in Monocrystalline 2D Ferroelectric Perovskite for High-Sensitive, Self-Powered, and Stable Ultraviolet Photodetector

Abstract

2D hybrid perovskite ferroelectrics have drawn great attention in the field of photodetection, because the spontaneous polarization-induced built-in electric field can separate electron-hole pairs, and makes self-powered photodetection possible. However, most of the 2D hybrid perovskitebased photodetectors focused on the detection of visible light, and only a few reports realized the self-powered and sensitive ultraviolet (UV) detection using wide bandgap hybrid perovskites. Here, 2D ferroelectric PMA 2 PbCl 4 monocrystalline microbelt (MMB)-based PDs are demonstrated. By using the ferro-pyro-phototronic effect, the self-powered Ag/Bi/2D PMA 2 PbCl 4 MMB/Bi/Ag PDs show a high photoresponsivity up to 9 A/W under 320 nm laser illumination, which is much higher than those of previously reported self-powered UV PDs. Compared with responsivity induced by the photovoltaic effect, the responsivity induced by the ferro-pyro-phototronic effect is 128 times larger. The self-powered PD also shows fast response and recovery speed, with the rise time and fall time of 162 and 226 μs, respectively. More importantly, the 2D PMA 2 PbCl 4 MMB-based PDs with Bi/Ag electrode exhibit significant stability when subjected to high humidity, continuous laser illumination, and thermal conditions. Our findings would shed light on the ferro-pyro-phototronic-effect-based devices, and provide a good method for high-performance UV detection.

Centimeter-sized single crystals of 2D hybrid perovskites toward ultraviolet photodetection with anisotropic photoresponse

“…Recently, organic-inorganic hybrid perovskites have emerged as potential successors for optoelectronic applications, owing to their large absorption coefficients, high carrier mobility, tunable bandgap and solution accessibility. [18][19][20] More interestingly, the structures of the hybrid perovskites usually depend on the organic spacers, enabling control over their bandgaps, compositions and dimensionalities via chemical synthesis. [21][22][23][24] In particular, twodimensional (2D) perovskites with unique layered structures can be formed through the doping of large organic spacers into threedimensional (3D) perovskite inorganic frameworks.…”

Pyro-phototronic effect enhanced broadband photodetection based on CdS nanorod arrays by magnetron sputtering

“…14–17 Through the coupling of the pyroelectric effect, photoelectric effect and semiconductor properties, the pyro-phototronic effect can modulate the built-in field of the PN junction and improve the device performance. 18–23 Therefore, it is imminent to investigate the applications of pyro-phototronics effect in the field of infrared photodetection. 24–27…”

“…[14][15][16][17] Through the coupling of the pyroelectric effect, photoelectric effect and semiconductor properties, the pyrophototronic effect can modulate the built-in eld of the PN junction and improve the device performance. [18][19][20][21][22][23] Therefore, it is imminent to investigate the applications of pyro-phototronics effect in the eld of infrared photodetection. [24][25][26][27] By intensively investigating this non-centrosymmetric property of CdS, Dai et al reported self-powered PDs based on the combination of CdS nanorods and silicon.…”

Patterned 2D Ferroelectric Perovskite Single-Crystal Arrays for Self-Powered UV Photodetector Boosted by Combining Ferro-Pyro-Phototronic and Piezo-Phototronic Effects

“…Perovskite ferroelectrics also possess piezoelectric effect and pyroelectric effect, which could further boost the perovskite ferroelectrics-based optoelectronic devices . Recently, the light-induced ferro-pyro-phototronic effect has been adopted in ITO/BaTiO 3 /Ag Schottky junction, BaTiO 3 /GaN heterojunction, and 2D perovskite single-crystal-based , UV devices. Moreover, the piezo-phototronic effect provides another effective method to enhance the performance of optoelectronic devices, , and has attracted much research interest to boost the performance of halide perovskite-based devices. ,− Thus, by combing the pyro-phototronic and the piezo-phototronic effects, obvious improvements for PEDOT: PSS/ZnO heterojunction and MAPbI 3 /Si heterojunction-based PDs were observed.…”

“…Nevertheless, until now, a majority of perovskite ferroelectrics-based PDs are fabricated either using monolithic crystals , or microscale single crystals with random size and orientation, lacking reproducibility and consistency. Patterning of perovskite single crystals is a critical step toward industrial fabrication, which needs high reproducibility and consistency .…”