The versatile photoresponse-turnability of two-dimensional (2D) semiconductors by tuning the gate voltage has proven promising pathways for in-sensor visible processing. Nevertheless, the present restricted dynamic vary and gradual response pace of the gate-tunable 2D photodetectors inhibit their implementation in difficult lighting circumstances. Right here, utilizing a facile, environment friendly, and common native electrostatic screening technique, we exhibit an electrostatic screening enabled single-gate-tunable in-plane homojunction photodiodes with bipolar excessive dynamic ranges (HDRs) and ultrafast photoresponse primarily based on WSe2. The showcase van der Waals (vdW) stacking of WSe2/PdSe2 in-plane homojunction photodiodes leveraging the environment friendly band alignment and fewer interface recombination inherited from vdW nature reveals a big bodily linear dynamic vary (LDR) as much as 142 dB and an ultrafast response time down to eight ns. These superior properties make sure the system captures high-precision HDR photos and performs in-sensor picture processing with low latency. Our outcomes present an efficient technique for setting up 2D photodetectors with tunable optimistic/damaging responses and excessive LDRs, which is promising for in-sensor visible processing of scenes with HDR.
