scholarly journals Hot‐Carrier‐Driven Photodetection: Room‐Temperature High‐Gain Long‐Wavelength Photodetector via Optical–Electrical Controlling of Hot Carriers in Graphene (Advanced Optical Materials 24/2018)

2018 ◽  
Vol 6 (24) ◽  
pp. 1870093
Author(s):  
Changlong Liu ◽  
Lin Wang ◽  
Xiaoshuang Chen ◽  
Antonio Politano ◽  
Dacheng Wei ◽  
...  
Keyword(s):  
Optical Materials ◽  
Room Temperature ◽  
High Gain ◽  
Hot Carriers ◽  
Long Wavelength ◽  
Hot Carrier

Room‐Temperature High‐Gain Long‐Wavelength Photodetector via Optical–Electrical Controlling of Hot Carriers in Graphene

2018 ◽  
Vol 6 (24) ◽  
pp. 1800836 ◽  
Author(s):  
Changlong Liu ◽  
Lin Wang ◽  
Xiaoshuang Chen ◽  
Antonio Politano ◽  
Dacheng Wei ◽  
...  
Keyword(s):  
Room Temperature ◽  
High Gain ◽  
Hot Carriers ◽  
Long Wavelength

scholarly journals Hot-carriers in organic photovoltaics

2021 ◽  
Vol 93 (2) ◽  
pp. 223-230
Author(s):  
Palas Roy
Keyword(s):  
Organic Photovoltaics ◽  
Excess Energy ◽  
Charge Carriers ◽  
Hot Carriers ◽  
Hot Carrier ◽  
Improve Efficiency ◽  
Coulombic Attraction ◽  
Carrier Escape

Abstract Photogenerated charge carriers in organic photovoltaics (OPVs) suffer relaxation and recombination losses. However, extracting these carriers at higher energy (‘Hot-carriers’) has been found to be effective to overcome such loss pathways and improve efficiency of OPVs. Excess energy and long delocalization length promotes hot-carrier escape from Coulombic attraction and dissociation into free charges. Here, I have reviewed the ways to generate hot-carriers and their extraction in organic backbones. In-depth understanding of their energetics and dynamics will help designing hot-carrier photovoltaics.

High-power long-wavelength room-temperature MOVPE-grown quantum cascade lasers with air-semiconductor waveguide

2008 ◽  
Vol 44 (8) ◽  
pp. 525 ◽  
Author(s):  
Q.J. Wang ◽  
C. Pflügl ◽  
L. Diehl ◽  
F. Capasso ◽  
S. Furuta ◽  
...  
Keyword(s):  
High Power ◽  
Room Temperature ◽  
Quantum Cascade Lasers ◽  
Long Wavelength ◽  
Quantum Cascade ◽  
Cascade Lasers

Determining plasmonic hot-carrier energy distributions via single-molecule transport measurements

Science ◽  
2020 ◽  
pp. eabb3457 ◽  
Author(s):  
Harsha Reddy ◽  
Kun Wang ◽  
Zhaxylyk Kudyshev ◽  
Linxiao Zhu ◽  
Shen Yan ◽  
...  
Keyword(s):  
Single Molecule ◽  
Plasmonic Nanostructures ◽  
Hot Carriers ◽  
Energy Distributions ◽  
Nanoscale Systems ◽  
Hot Carrier ◽  
Transport Measurements ◽  
Single Molecule Junctions ◽  
Molecule Transport ◽  
Carrier Energy

Hot-carriers in plasmonic nanostructures, generated via plasmon decay, play key roles in applications like photocatalysis and in photodetectors that circumvent band-gap limitations. However, direct experimental quantification of steady-state energy distributions of hot-carriers in nanostructures has so far been lacking. We present transport measurements from single-molecule junctions, created by trapping suitably chosen single molecules between an ultra-thin gold film supporting surface plasmon polaritons and a scanning probe tip, that can provide quantification of plasmonic hot-carrier distributions. Our results show that Landau damping is the dominant physical mechanism of hot-carrier generation in nanoscale systems with strong confinement. The technique developed in this work will enable quantification of plasmonic hot-carrier distributions in nanophotonic and plasmonic devices.

Photodetectors: Room Temperature Broadband Infrared Carbon Nanotube Photodetector with High Detectivity and Stability (Advanced Optical Materials 2/2016)

2016 ◽  
Vol 4 (2) ◽  
pp. 188-188
Author(s):  
Yang Liu ◽  
Nan Wei ◽  
Qingsheng Zeng ◽  
Jie Han ◽  
Huixin Huang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Optical Materials ◽  
Room Temperature

Thermally activated current–voltage asymmetry in quantum-well inter-subband photodetectors

1996 ◽  
Vol 74 (S1) ◽  
pp. 9-15 ◽  
Author(s):  
P. V. Kolev ◽  
M. J. Deen ◽  
H. C. Liu ◽  
Jianmeng Li ◽  
M. Buchanan ◽  
...  
Keyword(s):  
Quantum Well ◽  
Carrier Transport ◽  
Transport Phenomena ◽  
Infrared Region ◽  
Avalanche Photodetectors ◽  
Long Wavelength ◽  
Hot Carrier ◽  
Thermally Activated ◽  
Current Voltage ◽  
Long Wavelength Infrared

Continuing research interest in quantum-well inter-subband-based devices can be associated with its prospects for numerous optoelectronic applications in the long wavelength infrared region. This paper presents experimentally measured field dependence of the thermally activated effective-barrier lowering in quantum-well inter-subband photodetectors (QWIPs). This barrier lowering is considered to be the main cause of the commonly observed asymmetry in the current–voltage characteristics of QWIPs. The research results presented here are important for understanding the factors determining the dark-current mechanisms that are crucial for further improvement in the characteristics of these devices. The study of current-carrier transport phenomena in a quantum well is also of interest for developing quantum-well lasers and avalanche photodetectors based on intraband processes, and also transistors based on ballistic or hot carrier transport phenomena.

Long-wavelength electroluminescence of InGaAs-capped type-II GaSb/GaAs quantum-rings at room temperature

2013 ◽  
Vol 378 ◽  
pp. 571-575 ◽  
Author(s):  
Wei-Hsun Lin ◽  
Kai-Wei Wang ◽  
Shih-Yen Lin ◽  
Meng-Chyi Wu
Keyword(s):  
Room Temperature ◽  
Type Ii ◽  
Quantum Rings ◽  
Long Wavelength
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