Fig. 3: CIPS photodetector array for image processing.
From: Ionic-electronic photodetector for vision assistance with in-sensor image processing
a Photoresponse under 405 nm light at varying intensities, with the color bar indicating the net photocurrent. b Correlation between photocurrent and light intensity at different accumulation times, showing positive, parabolic, and negative correlations at 0.5 s, 5 s, and 10 s, respectively. c Optical and SEM images of the CIPS photodetector array consisting of 5 × 10 pixels. The scale bar in the optical image represents 50 µm, while that in the SEM image represents 20 µm. d Dark current map and corresponding histogram of the CIPS photodetector array. e Designed object image “FD” and its corresponding photocurrent map obtained from CIPS photodetector. f LTP and LTD behavior of CIPS photodetector under light pulses of 1 mW·cm−2 and 10 mW·cm−2, respectively. g Workflow of a CNN network, and the recognition accuracy of the raw image and processed image incorporating the LTP and LTD data for weight updating.
