Publication date: 3rd July 2020
Infrared photodetection is an interesting research and applications area for colloidal quantum dot. Within the present technology, photon detection with infrared epitaxial materials is very expensive while bolometric detection suffers from lower sensitivity and speed. CQDs, with wide spectral tunability, molecularly passivated surfaces, high throughput fabrication and direct coating of silicon read-out chips, could change the infrared technology. Pioneering work on PbS and HgTe quantum dots showed early promises, and commercialization of PbS CQD imaging systems started. Raising the performance drives exciting research on many generic issues of colloidal quantum dots, including size and shape control, surface passivation, mobility, doping, non-radiative processes, Auger relaxation, etc.
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