Perovskite multifunctional logic gates via bipolar photoresponse of single photodetector

Abstract

The explosive demand for a wide range of data processing has sparked interest towards a new logic gate platform as the existing electronic logic gates face limitations in accurate and fast computing. Accordingly, optoelectronic logic gates (OELGs) using photodiodes are of significant interest due to their broad bandwidth and fast data transmission, but complex configuration, power consumption, and low reliability issues are still inherent in these systems. Herein, we present a novel all-in-one OELG based on the bipolar spectral photoresponse characteristics of a self-powered perovskite photodetector (SPPD) having a back-to-back p+-i-n-p-p+ diode structure. Five representative logic gates (“AND”, “OR”, “NAND”, “NOR”, and “NOT”) are demonstrated with only a single SPPD via the photocurrent polarity control. For practical applications, we propose a universal OELG platform of integrated 8 × 8 SPPD pixels, demonstrating the 100% accuracy in five logic gate operations irrelevant to current variation between pixels.

High grain boundary recombination velocity in polycrystalline metal halide perovskites

“…Understanding carrier recombination behaviors in metal halide perovskite materials and devices is important for improving the performance of perovskite optoelectronic devices (1). Metal halide perovskites have achieved great progresses in photovoltaic application with rapid increase of the power conversion efficiency of perovskite solar cells from 3.8 to 25.5% (2)(3)(4) and other applications of radiation detectors (5,6), light detectors (7,8), and light-emitting diodes (9) with performance comparable to or better than existing technologies. While the bulk and surface recombination in perovskites have been widely studied, carrier recombination at the hidden grain boundaries (GBs) of polycrystalline perovskite films that are adopted in most of the state-of-the-art high-performance devices has not been well understood, leaving behind the ongoing debate of whether GBs are benign or detrimental to device performances (10).…”

Water Resistance and Flexible Cuprous Halide Composite Polysiloxane Luminescent Ceramics

“…Metal halide perovskites have attracted wide attention because of their merits such as high absorption coefficient, large charge diffusion length, and high rate of radiative recombination. 1,2 Because of these outstanding advantages, they were studied for solar cells, 3 light-emitting diodes, 4 photodetectors, 5 lasers, 6 and other related applications. 7−11 The main structure of lead and tin halide perovskites comprises corner-sharing metal halide octahedrons, leading to a delocalized electronic structure with large Wannier-type excitons characterized by low binding energies (few meVs), which are most suited for light-harvesting purposes (solar cells, photodetectors).…”

Screen-Printable Silver Paste Material for Semitransparent and Flexible Metal–Semiconductor–Metal Photodetectors with Liquid-Phase Procedure

“…The principle of detectors is to convert specific energies into other types of signals that can be read by an observer. An interesting category of detectors is photodetectors, which convert light energy into electrical signals [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. According to the wavelength of the detection range, photodetectors are applied to detect ultraviolet (UV), infrared (IR), and visible regions [ 9 , 10 , 11 , 12 , 13 , 14 ].…”