Fig. 4
From: Bioinspired phototransistor with tunable sensitivity for low-contrast target detection
Performance of tunable-sensitivity phototransistor array. a Optical image of a 3 × 3 phototransistor array (scale bar: 200 μm). b Magnified image of an individual sensor unit (scale bar: 10 μm). c IDS−VGS curves of the 9 phototransistors in dark and under 516-nm light at VDS = 0.1 V. d, e Comparison of input and output images, demonstrating the advantages of tunable-sensitivity phototransistor array in contrast enhancement (d) and noise filtering (e) compared with the conventional phototransistor arrays
