TY - JOUR
T1 - Colloidal Quantum Dots-Based Three-Band Infrared Photodetector with the Bias-Tunable Spectral Response
AU - Zhao, Pengfei
AU - Mu, Ge
AU - Wen, Chong
AU - Qi, Yawei
AU - Lv, Hongyv
AU - Tang, Xin
N1 - Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023
Y1 - 2023
N2 - Multiband infrared photodetectors (PDs) have garnered considerable attention due to their potential in various fields such as biomedical applications, optical communications, and military operations. However, the lattice mismatch of mature bulk semiconductors with varying bandgaps in the same PD pixel has impeded the advancement of multiband infrared detectors. Colloidal quantum dots (CQDs), with adjustable bandgaps, wide spectral range, and easy solution processing are promising materials for the fabrication of multiband infrared detectors. Herein, HgTe CQDs are used with varying bandgaps to construct a three-band infrared detector with short-wave infrared of 1.7 and 2.4 μm and midwave infrared of 4 μm. The utilization of Ag2Te nanocrystals to bring in spatially stable doping is the key to achieving three-band infrared detectors. Through adjusting bias polarity, the detectors switch between a three-band mode and a dual-band mode. The detector exhibits exceptional detection performance, with detectivity above 3 × 1010 Jones in three-band mode.
AB - Multiband infrared photodetectors (PDs) have garnered considerable attention due to their potential in various fields such as biomedical applications, optical communications, and military operations. However, the lattice mismatch of mature bulk semiconductors with varying bandgaps in the same PD pixel has impeded the advancement of multiband infrared detectors. Colloidal quantum dots (CQDs), with adjustable bandgaps, wide spectral range, and easy solution processing are promising materials for the fabrication of multiband infrared detectors. Herein, HgTe CQDs are used with varying bandgaps to construct a three-band infrared detector with short-wave infrared of 1.7 and 2.4 μm and midwave infrared of 4 μm. The utilization of Ag2Te nanocrystals to bring in spatially stable doping is the key to achieving three-band infrared detectors. Through adjusting bias polarity, the detectors switch between a three-band mode and a dual-band mode. The detector exhibits exceptional detection performance, with detectivity above 3 × 1010 Jones in three-band mode.
KW - bias-tunable spectral responses
KW - colloidal quantum dots
KW - three-band infrared photodetectors
UR - http://www.scopus.com/inward/record.url?scp=85160692749&partnerID=8YFLogxK
U2 - 10.1002/pssr.202300121
DO - 10.1002/pssr.202300121
M3 - Article
AN - SCOPUS:85160692749
SN - 1862-6254
JO - Physica Status Solidi - Rapid Research Letters
JF - Physica Status Solidi - Rapid Research Letters
ER -