Fig. 2: CQD photodiodes.
From: High-operating-temperature mid-infrared photodetectors via quantum dot gradient homojunction
a Schematic diagram of high mobility CQD homojunction photodiode. b SEM of high mobility CQD homojunction photodiode cross-section. c–e Energy diagram of high mobility PIN gradient, PI, and IN homojunction, respectively. f–h I-V curve characterization on high mobility PIN gradient, PI, and IN homojunction devices with the insert graph zoom in the near zero bias part at 80 K, respectively
