scholarly journals Ultrafast hot carrier dynamics of ZrTe5 from time-resolved optical reflectivity

2019 ◽  
Vol 99 (12) ◽  
Author(s):  
Xiu Zhang ◽  
Hai-Ying Song ◽  
X. C. Nie ◽  
Shi-Bing Liu ◽  
Yang Wang ◽  
...  
Keyword(s):  
Carrier Dynamics ◽  
Time Resolved ◽  
Hot Carrier ◽  
Optical Reflectivity

scholarly journals Effects of Crystal Morphology on the Hot-Carrier Dynamics in Mixed-Cation Hybrid Lead Halide Perovskites

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 708
Author(s):  
Daniele Catone ◽  
Giuseppe Ammirati ◽  
Patrick O’Keeffe ◽  
Faustino Martelli ◽  
Lorenzo Di Mario ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Carrier Dynamics ◽  
Large Area ◽  
Photovoltaic Properties ◽  
Time Resolved ◽  
Hot Carrier ◽  
Mixed Cation ◽  
Small Crystals ◽  
Characterization Of Materials ◽  
Lead Halide

Ultrafast pump-probe spectroscopies have proved to be an important tool for the investigation of charge carriers dynamics in perovskite materials providing crucial information on the dynamics of the excited carriers, and fundamental in the development of new devices with tailored photovoltaic properties. Fast transient absorbance spectroscopy on mixed-cation hybrid lead halide perovskite samples was used to investigate how the dimensions and the morphology of the perovskite crystals embedded in the capping (large crystals) and mesoporous (small crystals) layers affect the hot-carrier dynamics in the first hundreds of femtoseconds as a function of the excitation energy. The comparative study between samples with perovskite deposited on substrates with and without the mesoporous layer has shown how the small crystals preserve the temperature of the carriers for a longer period after the excitation than the large crystals. This study showed how the high sensitivity of the time-resolved spectroscopies in discriminating the transient response due to the different morphology of the crystals embedded in the layers of the same sample can be applied in the general characterization of materials to be used in solar cell devices and large area modules, providing further and valuable information for the optimization and enhancement of stability and efficiency in the power conversion of new perovskite-based devices.

TIME-RESOLVED RAMAN STUDIES OF NON-EQUILIBRIUM EXCITATIONS IN GaAs-AlAs AND GaAs-AlxGa1−xAs MULTIPLE QUANTUM WELL STRUCTURES

1992 ◽  
Vol 06 (12) ◽  
pp. 703-716 ◽  
Author(s):  
K. T. TSEN
Keyword(s):  
Quantum Well ◽  
Multiple Quantum Well ◽  
Carrier Dynamics ◽  
Multiple Quantum ◽  
Electron Hole ◽  
Photoexcited Electron ◽  
Time Resolved ◽  
Quantum Well Structures ◽  
Hot Carrier ◽  
Electron Hole Plasma

Recent experimental results obtained from time-resolved Raman studies in GaAs-AlAs and GaAs-Al x Ga 1−x As multiple quantum well structures are reviewed. Particular emphasis is made on (1) electron-phonon and phonon-phonon interactions and their association with the hot-phonon effects in the hot-carrier dynamics of multiple quantum well structures; and (2) the transport properties of photoexcited electron-hole plasma and excitons in semiconductor multiple quantum well structures.

Hot Carrier Dynamics and Charge Trapping in Surface Passivated β-CsPbI3 Inorganic Perovskite

2021 ◽  
pp. 6907-6913
Author(s):  
Xian Wang ◽  
Dayujia Huo ◽  
Xin Wang ◽  
Minjie Li ◽  
Yong Wang ◽  
...  
Keyword(s):  
Charge Trapping ◽  
Carrier Dynamics ◽  
Inorganic Perovskite ◽  
Hot Carrier

Hot carrier dynamics in GaAs epilayer structures grown on Si

1992 ◽  
Vol 7 (3B) ◽  
pp. B195-B198
Author(s):  
Kai Shum ◽  
Y Takiguchi ◽  
J M Mohaidat ◽  
R R Alfano ◽  
K Adomi ◽  
...  
Keyword(s):  
Carrier Dynamics ◽  
Hot Carrier

Time-Resolved Observations of Photo-Generated Charge-Carrier Dynamics in Sb2Se3 Photocathodes for Photoelectrochemical Water Splitting

ACS Nano ◽  
2018 ◽  
Vol 12 (11) ◽  
pp. 11088-11097 ◽  
Author(s):  
Wooseok Yang ◽  
Seungmin Lee ◽  
Hyeok-Chan Kwon ◽  
Jeiwan Tan ◽  
Hyungsoo Lee ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Water Splitting ◽  
Carrier Dynamics ◽  
Photoelectrochemical Water Splitting ◽  
Time Resolved ◽  
Charge Carrier Dynamics
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