Pump and probe terahertz beam excitation technique to investigate carrier dynamics in YBa2Cu3O7−δ thin films

2001 ◽  
Vol 357-360 ◽  
pp. 146-148 ◽  
Author(s):  
Hagen Wald ◽  
Paul Seidel ◽  
Masayoshi Tonouchi
Keyword(s):  
Thin Films ◽  
Carrier Dynamics ◽  
Pump And Probe ◽  
Beam Excitation

scholarly journals Superior photo-carrier diffusion dynamics in organic-inorganic hybrid perovskites revealed by spatiotemporal conductivity imaging

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xuejian Ma ◽  
Fei Zhang ◽  
Zhaodong Chu ◽  
Ji Hao ◽  
Xihan Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Relaxation Times ◽  
Charge Trapping ◽  
Free Carrier ◽  
Carrier Dynamics ◽  
Electron Hole ◽  
Inorganic Hybrid ◽  
Diffusion Dynamics ◽  
The Difference

AbstractThe outstanding performance of organic-inorganic metal trihalide solar cells benefits from the exceptional photo-physical properties of both electrons and holes in the material. Here, we directly probe the free-carrier dynamics in Cs-doped FAPbI3 thin films by spatiotemporal photoconductivity imaging. Using charge transport layers to selectively quench one type of carriers, we show that the two relaxation times on the order of 1 μs and 10 μs correspond to the lifetimes of electrons and holes in FACsPbI3, respectively. Strikingly, the diffusion mapping indicates that the difference in electron/hole lifetimes is largely compensated by their disparate mobility. Consequently, the long diffusion lengths (3~5 μm) of both carriers are comparable to each other, a feature closely related to the unique charge trapping and de-trapping processes in hybrid trihalide perovskites. Our results unveil the origin of superior diffusion dynamics in this material, crucially important for solar-cell applications.

Pump-and-probe terahertz method to investigate YBa2Cu3O7−δ thin films

2002 ◽  
Vol 367 (1-4) ◽  
pp. 308-316 ◽  
Author(s):  
Hagen Wald ◽  
Paul Seidel ◽  
Masayoshi Tonouchi
Keyword(s):  
Thin Films ◽  
Pump And Probe

Ultrafast Carrier Dynamics in (Bi1-xInx)2Se3 Thin Films: From Topological to Band Insulator

2021 ◽  
Author(s):  
Kateryna Kushnir ◽  
Teng Shi ◽  
Zhengtianye Wang ◽  
Stephanie Law ◽  
Lyubov Titova
Keyword(s):  
Thin Films ◽  
Carrier Dynamics ◽  
Ultrafast Carrier Dynamics ◽  
Ultrafast Carrier ◽  
Band Insulator

Optical pump-and-probe measurement of the thermal conductivity of nitride thin films

2002 ◽  
Vol 92 (7) ◽  
pp. 3820-3824 ◽  
Author(s):  
B. C. Daly ◽  
H. J. Maris ◽  
A. V. Nurmikko ◽  
M. Kuball ◽  
J. Han
Keyword(s):  
Thin Films ◽  
Thermal Conductivity ◽  
Probe Measurement ◽  
Optical Pump ◽  
Pump And Probe

scholarly journals Ultrafast Charge Carrier Dynamics in Vanadium-Modified TiO2 Thin Films and Its Relation to Their Photoelectrocatalytic Efficiency for Water Splitting

2020 ◽  
Vol 124 (49) ◽  
pp. 26572-26582
Author(s):  
Alberto Piccioni ◽  
Daniele Catone ◽  
Alessandra Paladini ◽  
Patrick O’Keeffe ◽  
Alex Boschi ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Carrier ◽  
Water Splitting ◽  
Carrier Dynamics ◽  
Tio2 Thin Films ◽  
Charge Carrier Dynamics

Anomaly of Thermal Properties in Thin Films of La1-x SrxCoO3 Series Fabricated as Thermoelectric Materials

2002 ◽  
Vol 730 ◽  
Author(s):  
Yoshiaki Takata ◽  
Hajime Haneda ◽  
Yutaka Adachi ◽  
Yoshiki Wada ◽  
Takefumi Mitsuhashi ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Properties ◽  
Thermal Diffusivity ◽  
Thermoelectric Materials ◽  
Signal Analysis ◽  
Material Synthesis ◽  
Thermo Electric ◽  
Optical Pump ◽  
Pump And Probe ◽  
Reflection Geometry

AbstractComposition spreads of La1-xSrxCoO3 (LSCO) were synthesized as thermo-electric transducer material by means of combinatorial material synthesis, and information on their thermal diffusivity throughout the specimens was obtained. Meanwhile, it is anticipated that the composition spreads of LSCO have a variety of characteristic properties of light absorption corresponding to their composition, namely their compositional variable, x. Hence, we used transient optical pump-and-probe techniques in a reflection geometry to measure thermal diffusion times on LSCO. The results of signal analysis indicate that LSCO is a peculiar synthesized substance whose apparent thermal diffusivity, 1/ι, changes abruptly at the critical point, where the compositional variable x is equal to 0.3.

Carrier dynamics in YBa2Cu3O7−x studied by pump and probe terahertz excitation

2001 ◽  
Vol 362 (1-4) ◽  
pp. 324-328 ◽  
Author(s):  
Hagen Wald ◽  
Paul Seidel ◽  
Masayoshi Tonouchi
Keyword(s):  
Carrier Dynamics ◽  
Pump And Probe
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