Carrier dynamics in self-assembled ErAs nanoislands embedded in GaAs measured by optical-pump terahertz-probe spectroscopy

2005 ◽  
Vol 86 (20) ◽  
pp. 201107 ◽  
Author(s):  
R. P. Prasankumar ◽  
A. Scopatz ◽  
D. J. Hilton ◽  
A. J. Taylor ◽  
R. D. Averitt ◽  
...  
Keyword(s):  
Carrier Dynamics ◽  
Optical Pump ◽  
Self Assembled ◽  
Probe Spectroscopy

Carrier Dynamics in Self-Assembled ErAs Nanoislands Measured by Optical Pump-THz Probe Spectroscopy

2005 ◽  
Author(s):  
R. P. Prasankumar ◽  
A. Scopatz ◽  
D. J. Hilton ◽  
A. J. Taylor ◽  
R. D. Averitt ◽  
...  
Keyword(s):  
Carrier Dynamics ◽  
Optical Pump ◽  
Self Assembled ◽  
Probe Spectroscopy

scholarly journals Measurements of the Carrier Dynamics and Terahertz Response of Oriented Germanium Nanowires using Optical-Pump Terahertz-Probe Spectroscopy

Nano Letters ◽  
2009 ◽  
Vol 9 (8) ◽  
pp. 2967-2972 ◽  
Author(s):  
Jared H. Strait ◽  
Paul A. George ◽  
Mark Levendorf ◽  
Martin Blood-Forsythe ◽  
Farhan Rana ◽  
...  
Keyword(s):  
Carrier Dynamics ◽  
Optical Pump ◽  
Germanium Nanowires ◽  
Probe Spectroscopy

scholarly journals Nonequilibrium Carrier Dynamics Studied in Underdoped Bi2212 by Polarized Optical Pump-Probe Spectroscopy

2009 ◽  
Vol 23 (5) ◽  
pp. 871-872
Author(s):  
Y. Toda ◽  
J. Sekiya ◽  
Y. H. Liu ◽  
N. Momono ◽  
M. Oda ◽  
...  
Keyword(s):  
Carrier Dynamics ◽  
Nonequilibrium Carrier ◽  
Optical Pump ◽  
Pump Probe ◽  
Probe Spectroscopy

scholarly journals Phase segregation in mixed-halide perovskites affects charge-carrier dynamics while preserving mobility

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Silvia G. Motti ◽  
Jay B. Patel ◽  
Robert D. J. Oliver ◽  
Henry J. Snaith ◽  
Michael B. Johnston ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Management Strategies ◽  
Phase Segregation ◽  
Carrier Dynamics ◽  
Optical Pump ◽  
Charge Carrier Dynamics ◽  
Halide Perovskites ◽  
Probe Spectroscopy ◽  
The Impact

AbstractMixed halide perovskites can provide optimal bandgaps for tandem solar cells which are key to improved cost-efficiencies, but can still suffer from detrimental illumination-induced phase segregation. Here we employ optical-pump terahertz-probe spectroscopy to investigate the impact of halide segregation on the charge-carrier dynamics and transport properties of mixed halide perovskite films. We reveal that, surprisingly, halide segregation results in negligible impact to the THz charge-carrier mobilities, and that charge carriers within the I-rich phase are not strongly localised. We further demonstrate enhanced lattice anharmonicity in the segregated I-rich domains, which is likely to support ionic migration. These phonon anharmonicity effects also serve as evidence of a remarkably fast, picosecond charge funnelling into the narrow-bandgap I-rich domains. Our analysis demonstrates how minimal structural transformations during phase segregation have a dramatic effect on the charge-carrier dynamics as a result of charge funnelling. We suggest that because such enhanced recombination is radiative, performance losses may be mitigated by deployment of careful light management strategies in solar cells.

Photoinduced carrier dynamics in bulk ZnTe using optical-pump terahertz-probe spectroscopy

2020 ◽  
Vol 59 (05) ◽  
pp. 1 ◽  
Author(s):  
Hu Deng ◽  
Linyu Chen ◽  
Weiwei Qu ◽  
Quancheng Liu ◽  
Samuel Danso ◽  
...  
Keyword(s):  
Carrier Dynamics ◽  
Optical Pump ◽  
Probe Spectroscopy
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