Fig. 3: The performance of the optimized heterojunction photodetector in the infrared spectrum.
a Device I-V curves and b Iph and R values under an illumination wavelength of 1550 nm. c Noise currents of the heterojunction device, varying with the frequency (0.1 and 1 V). d Iph and R of the device under an incident wavelength of 980 nm. e Device response speed under an incident wavelength of 1550 nm. The zoomed-in views of the rise and decay versus time correspond to start times of 22.110 and 27.029 s, respectively.
