Self‐Rolled‐up Te/Graphene Photothermoelectric Detector Enhanced with Built‐in Field for Imaging and Convolution Processing

ABSTRACT Amidst the rapid evolution of the information society, there is a pressing demand for photodetectors which integrate high performance with imaging and processing capabilities. However, implementing traditional image processing relying on predefined convolution kernels inherently suffers from constrained adaptability and is difficult in individual optimization. Here, we introduce a self‐rolled‐up Te/Graphene photothermoelectric detector (STGP), pioneering a physics‐response‐driven self‐construct convolution kernel strategy rooted in its wide‐angle detection performance for advanced image feature extraction. The STGP leverages a tubular morphology that efficiently enhances light absorption via light‐trapping effect while the built‐in electric field is established at the Te/Graphene interface due to their work function difference, which promotes the directional transport of photo‐thermally excited carriers, substantially suppressing interfacial recombination losses. The STGP realizes a high voltage responsivity of 259 V W −1 at 940 nm and an ultrafast response time. Functionally, the unique tubular geometry enables exceptional wide‐angle detection, which is used as the basis for self‐construct convolution kernels and achieve effective image sharpening and edge extraction. This work not only provides a novel built‐in field enhancement strategy for photothermoelectric detectors but also establishes a new paradigm for in‐sensor computing by integrating the material's physical response with computational functions.