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Extending the detection limit: innovations in infrared quantum dot photodetectors reaching up to 18 μm
Chong Wu Wang1, Qi Jie Wang2,3
1Centre for OptoElectronics and Biophotonics, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
Abstract:
A regrowth method was used to synthesize large-sized colloidal quantum dots (CQDs). With the assistance of doping engineering, the synthesized CQD detectors demonstrate exceptional long-wavelength infrared detection performance, reaching up to 18 μm, significantly extending the spectral response limit for CQD-based infrared detectors. These detectors also achieve a reasonably high detectivity of 6.6 × 108 Jones.
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