Background limited mid-infrared photodetection with photovoltaic HgTe colloidal quantum dots

2015 ◽  
Vol 107 (25) ◽  
pp. 253104 ◽  
Author(s):  
Philippe Guyot-Sionnest ◽  
John Andris Roberts
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Mid Infrared ◽  
Infrared Photodetection

Manganese doped eco-friendly CuInSe2 colloidal quantum dots for boosting near-infrared photodetection performance

2021 ◽  
Vol 403 ◽  
pp. 126452
Author(s):  
Ruiqi Guo ◽  
Jie Meng ◽  
Weihua Lin ◽  
Aqiang Liu ◽  
Tönu Pullerits ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Colloidal Quantum Dots ◽  
Infrared Photodetection

Photoluminescence of Mid-Infrared HgTe Colloidal Quantum Dots

2014 ◽  
Vol 118 (5) ◽  
pp. 2749-2753 ◽  
Author(s):  
Sean Keuleyan ◽  
John Kohler ◽  
Philippe Guyot-Sionnest
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Mid Infrared

Air-Stable, Near- to Mid-Infrared Emitting Solids of PbTe/CdTe Core-Shell Colloidal quantum dots

ChemPhysChem ◽  
2016 ◽  
Vol 17 (5) ◽  
pp. 670-674 ◽  
Author(s):  
Loredana Protesescu ◽  
Tanja Zünd ◽  
Maryna I. Bodnarchuk ◽  
Maksym V. Kovalenko
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Mid Infrared ◽  
Cdte Core

scholarly journals Sub-nanosecond Infrared Photodetection using III-V Colloidal Quantum Dots

2020 ◽  
Author(s):  
Bin Sun ◽  
Amin morteza najarian ◽  
Chao Zheng ◽  
Laxmi Sagar ◽  
Min-Jae Choi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Mobility ◽  
Colloidal Quantum Dots ◽  
Covalent Character ◽  
High Permittivity ◽  
Tunable Bandgap ◽  
Ligand Coordination ◽  
Heavy Doping ◽  
Infrared Photodetection ◽  
Low Permittivity

Abstract Colloidal quantum dots (CQDs) are promising materials for IR light detection due to their tunable bandgap and solution processing; but to date, the time response of CQD IR photodiodes has been inferior to that provided by Si and InGaAs. We reasoned that the high permittivity of II-VI CQDs leads to slow charge extraction due to screening and capacitance; whereas III-Vs – if their surface chemistry could be mastered – offer a strong covalent character for low permittivity and fast operation. In initial studies, we found that existing covalent character led to imbalanced charge transport in InAs, the result of unpassivated surfaces and uncontrolled heavy doping. We report surface management using amphoteric ligand coordination and find that it addresses simultaneously the In and As surface dangling bonds. The new InAs CQD solids combine high mobility (0.04 cm2 V-1 s-1) with a 4x reduction in permittivity compared to PbS CQDs. The resulting photodiodes achieve a response time faster than 300 ps – a more than 100x improvement compared to the best previously-reported CQD photodiodes – combined with an external quantum efficiency (EQE) of 30% at 940 nm.

scholarly journals Ligand engineering of mid-infrared Ag2Se colloidal quantum dots

2020 ◽  
Vol 124 ◽  
pp. 114223 ◽  
Author(s):  
Shihab Bin Hafiz ◽  
Mohammad M. Al Mahfuz ◽  
Michael R. Scimeca ◽  
Sunghwan Lee ◽  
Soong Ju Oh ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Mid Infrared

Silver Selenide Colloidal Quantum Dots for Mid-Wavelength Infrared Photodetection

2019 ◽  
Vol 2 (3) ◽  
pp. 1631-1636 ◽  
Author(s):  
Shihab B. Hafiz ◽  
Michael R. Scimeca ◽  
Peter Zhao ◽  
Ingrid J. Paredes ◽  
Ayaskanta Sahu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Silver Selenide ◽  
Infrared Photodetection

Mid-Infrared Photoluminescence of CdS and CdSe Colloidal Quantum Dots

ACS Nano ◽  
2016 ◽  
Vol 10 (2) ◽  
pp. 2225-2231 ◽  
Author(s):  
Kwang Seob Jeong ◽  
Philippe Guyot-Sionnest
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Mid Infrared
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