Journal
JOURNAL OF ELECTRONIC MATERIALS
Volume 41, Issue 10, Pages 2725-2729Publisher
SPRINGER
DOI: 10.1007/s11664-012-2006-9
Keywords
Colloidal quantum dot; HgTe; mid-infrared; photodetectors
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We report on HgTe colloidal-based quantum-dot mid-infrared (IR) photodetectors. We demonstrate tuning the cutoff wavelength of this detector from the near IR up to 7 mu m. Responsivity values of films of HgTe nanoparticles a few hundred nanometers thick are in the 100 mA W-1 range even at room temperature. The detectivity of this film is limited by large 1/f noise. Time responses as short as 200 ns are achieved.
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