Optoelectronic Circuit Design Based on Logical Operations of Perovskite Photodetectors

Abstract

Light has gained significant attention as a data transmission medium due to its high processing speed, broad terahertz bandwidth, and low heat generation. To address the limitations of traditional logic circuits based on electronic transistors, optoelectronic logic circuits utilizing optical transmission have emerged as a promising alternative. In this study, a perovskite-based multifunctional logic gate is demonstrated using a back- to-back diode photodetector with bipolar photoresponse characteristics. A wide bandgap perovskite layer for visible light absorption was deposited via a one-step solution process, while a narrow bandgap perovskite layer for near-infrared absorption was fabricated using a two-step conversion process. The resulting device exhibited bipolar photoresponse, enabling its integration into circuits such as a half adder, half subtractor, 4×2 encoder, and 2×4 decoder. These circuits, powered exclusively by light, were validated through current measurements and LED outputs driven by amplified currents. These results emphasize the potential of perovskite devices for optical computing, offering a pathway toward advanced logic circuits and data processing systems. Keywords: Perovskite photodetectors, Bipolar photoresponse, Perovskite logic gates, Optoelectronic circuits, Optical computing, Combinational logic circuits