scholarly journals Equilibrium and Non-Equilibrium Ultrafast Carrier Transport and Dynamics in Chalcopyrite Semiconductors

2021 ◽  
Author(s):  
Rishmali Thanuja Sooriyagoda
Keyword(s):  
Carrier Transport ◽  
Chalcopyrite Semiconductors ◽  
Ultrafast Carrier ◽  
Non Equilibrium

scholarly journals Non-Equilibrium Carrier Transport in Strongly Coupled Quantum Dot Solids and Heterostructures

2021 ◽  
Author(s):  
Mengxia Liu ◽  
Sachin Dev Verma ◽  
Zhilong Zhang ◽  
Jooyoung Sung ◽  
Akshay Rao
Keyword(s):  
Quantum Dot ◽  
Carrier Transport ◽  
Transient Absorption ◽  
High Mobility ◽  
Full Potential ◽  
Strongly Coupled ◽  
Transport Length ◽  
Energetic Disorder ◽  
Colloidal Quantum Dot ◽  
Non Equilibrium

Abstract Understanding and controlling carrier dynamics in colloidal quantum dot (CQD) solids is crucial for unlocking their full potential for optoelectronic applications. The recent development of solution-processing methods to incorporate CQDs into high-mobility semiconducting matrices opens new routes to control simultaneously electronic coupling and packing uniformity in CQD solids. However, the fundamental nature of carrier transport in such systems remains elusive. Here we report the direct visualisation of carrier propagation in metal-halide exchanged PbS CQD solids and quantum-dot-in-perovskite (QDiP) heterostructures via transient absorption microscopy. We reveal three distinct transport regimes: an initial band-like transport persisting over hundreds of femtoseconds, an Auger-assisted sub-diffusive transport before thermal equilibrium is achieved, and a final hopping regime at longer times. The band-like transport was observed to correlate strongly with the extent of carrier delocalisation and the degree of energetic disorder. By tailoring the perovskite content in heterostructures, we obtained a band-like transport length of 90 nm at room temperature and an equivalent diffusivity of up to 106 cm2 s-1 – which is four orders of magnitude higher than the steady-state values obtained for PbS CQD solids. These findings not only shed light on the non-equilibrium dynamics in CQD solids and their influence on carrier transport, but also introduce promising strategies to harness non-equilibrium transport phenomena for more efficient optoelectronic devices.

Time‐resolved luminescence study of ultrafast carrier transport in GaAs metal‐semiconductor‐metal devices

1993 ◽  
Vol 62 (7) ◽  
pp. 732-734 ◽  
Author(s):  
R. Kersting ◽  
J. Plettner ◽  
K. Leo ◽  
S. Averin ◽  
H. Kurz
Keyword(s):  
Carrier Transport ◽  
Time Resolved ◽  
Luminescence Study ◽  
Metal Semiconductor Metal ◽  
Ultrafast Carrier

Ultrafast carrier transport in GaAs measured by optical pump-terahertz probe spectroscopy

2009 ◽  
Author(s):  
Hai-yan Yang ◽  
Yu-lei Shi ◽  
Qing-li Zhou ◽  
Dong-mei Zhao ◽  
Lei Li ◽  
...  
Keyword(s):  
Carrier Transport ◽  
Optical Pump ◽  
Ultrafast Carrier ◽  
Probe Spectroscopy

Non-equilibrium carrier transport and dynamics of type-II quantum wells

2021 ◽  
Author(s):  
Herath P. Piyathilaka ◽  
Rishmali Sooriyagoda ◽  
Hamidreza Esmaielpour ◽  
Vincent R. Whiteside ◽  
Tetsuya D. Mishima ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Carrier Transport ◽  
Type Ii ◽  
Type Ii Quantum Wells ◽  
Non Equilibrium

Carrier Transport and Non-Equilibrium Phenomena in Doped PbTe and Related Materials

1993 ◽  
Vol 137 (1) ◽  
pp. 9-55 ◽  
Author(s):  
B. A. Akimov ◽  
A. V. Dmitriev ◽  
D. R. Khokhlov ◽  
L. I. Ryabova
Keyword(s):  
Carrier Transport ◽  
Non Equilibrium

Non-Equilibrium Minority Carrier Transport

2020 ◽  
pp. 1-24
Author(s):  
A. F. J. Levi
Keyword(s):  
Carrier Transport ◽  
Minority Carrier ◽  
Non Equilibrium

Non-equilibrium carrier transport in a high-quality InN film grown on GaN

2005 ◽  
Vol 2 (7) ◽  
pp. 2297-2300 ◽  
Author(s):  
L. W. Liang ◽  
K.T. Tsen ◽  
C. Poweleit ◽  
D.K. Ferry ◽  
Shaw-Wei D. Tsen ◽  
...  
Keyword(s):  
Carrier Transport ◽  
High Quality ◽  
Non Equilibrium

scholarly journals Imaging Ultrafast Carrier Transport in Nanoscale Field-Effect Transistors

ACS Nano ◽  
2014 ◽  
Vol 8 (11) ◽  
pp. 11361-11368 ◽  
Author(s):  
Byung Hee Son ◽  
Jae-Ku Park ◽  
Jung Taek Hong ◽  
Ji-Yong Park ◽  
Soonil Lee ◽  
...  
Keyword(s):  
Field Effect ◽  
Carrier Transport ◽  
Field Effect Transistors ◽  
Ultrafast Carrier

scholarly journals Monte Carlo Simulation of Ultrafast Carrier Transport: Scalability Study

2013 ◽  
Vol 18 ◽  
pp. 2298-2306 ◽  
Author(s):  
Aneta Karaivanova ◽  
Emanuil Atanassov ◽  
Todor Gurov
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Carrier Transport ◽  
Ultrafast Carrier
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