Search

Here, we demonstrate a high-performance photodetector for wide spectral detection (405 nm-808 nm). The device is based on 2D/3D van der Waals heterojunction (vHJ) by directly integrating MAPbI3 single crystal (SC) onto monolayer graphene with a developed inverse temperature crystallization method (DITC). The proposed photodetector exhibits a high responsivity of 1.45 A/W, an excellent detectivity of ${6}.{67} \times {10} ^{{12}}$ Jones, an impressive on/off ratio of nearly $10^{{4}}$ . Moreover, the fabricated device also shows an excellent self-powered behavior with a high 3-dB bandwidth of 3.5 kHz, and a fast rise/fall time of $69 \, \mu \text{s}/138 \, \mu \text{s}$ . Our work provides a novel insight for the design of high-performance photodetector based on 2D/3D vHJ.

Logic-in-memory (LIM) architecture holds great potential to break the von Neumann bottleneck. Despite the extensive research on novel devices, challenges persist in developing suitable engineering building blocks for such designs. Herein, we propose a reconfigurable strategy for efficient implementation of Boolean logics based on a hafnium oxide-based ferroelectric field effect transistor (HfO2-based FeFET). The logic results are stored within the device itself (in situ) during the computation process, featuring the key characteristics of LIM. The fast switching speed and low power consumption of a HfO2-based FeFET enable the execution of Boolean logics with an ultralow energy of lower than 8 attojoule (aJ). This represents a significant milestone in achieving aJ-level computing energy consumption. Furthermore, the system demonstrates exceptional reliability with computing endurance exceeding 108cycles and retention properties exceeding 1000 s. These results highlight the remarkable potential of a FeFET for the realization of high performance beyond the von Neumann LIM computing architectures.