Structure and Dynamics from Time Resolved Absorption and Raman Spectroscopy

2013 ◽  
pp. 25-41 ◽  
Author(s):  
Siva Umapathy ◽  
Khokan Roy ◽  
Surajit Kayal ◽  
Nilesh Rai ◽  
Ravi Kumar Venkatraman
Keyword(s):  
Raman Spectroscopy ◽  
Time Resolved ◽  
Structure And Dynamics

scholarly journals Direct Observation of Structure and Dynamics of Photogenerated Charge Carriers in Poly(3-hexylthiophene) Films by Femtosecond Time-Resolved Near-IR Inverse Raman Spectroscopy

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 431 ◽  
Author(s):  
Tomohisa Takaya ◽  
Ippei Enokida ◽  
Yukio Furukawa ◽  
Koichi Iwata
Keyword(s):  
Raman Spectroscopy ◽  
Conjugated Polymers ◽  
Charge Separation ◽  
Resonance Raman Spectroscopy ◽  
Acid Methyl Ester ◽  
P3ht Film ◽  
Time Resolved ◽  
Blend Film ◽  
Structure And Dynamics ◽  
Near Ir

The initial charge separation process of conjugated polymers is one of the key factors for understanding their conductivity. The structure of photogenerated transients in conjugated polymers can be observed by resonance Raman spectroscopy in the near-IR region because they exhibit characteristic low-energy transitions. Here, we investigate the structure and dynamics of photogenerated transients in a regioregular poly(3-hexylthiophene) (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) blend film, as well as in a pristine P3HT film, using femtosecond time-resolved resonance inverse Raman spectroscopy in the near-IR region. The transient inverse Raman spectrum of the pristine P3HT film at 50 ps suggests coexistence of neutral and charged excitations, whereas that of the P3HT:PCBM blend film at 50 ps suggests formation of positive polarons with a different structure from those in an FeCl3-doped P3HT film. Time-resolved near-IR inverse Raman spectra of the blend film clearly show the absence of charge separation between P3HT and PCBM within the instrument response time of our spectrometer, while they indicate two independent pathways of the polaron formation with time constants of 0.3 and 10 ps.

Time-resolved stand-off UV-Raman spectroscopy for planetary exploration

2014 ◽  
Vol 92 ◽  
pp. 88-100 ◽  
Author(s):  
M. Skulinova ◽  
C. Lefebvre ◽  
P. Sobron ◽  
E. Eshelman ◽  
M. Daly ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Planetary Exploration ◽  
Time Resolved ◽  
Uv Raman Spectroscopy ◽  
Uv Raman

Ballistic electron transport in InP observed by subpicosend time-resolved Raman spectroscopy

1999 ◽  
Author(s):  
Kong-Thon F. Tsen ◽  
David K. Ferry ◽  
Jyh-Shyang Wang ◽  
Chao-Hsiung Huang ◽  
Hao-Hsiung Lin
Keyword(s):  
Raman Spectroscopy ◽  
Electron Transport ◽  
Time Resolved ◽  
Ballistic Electron ◽  
Ballistic Electron Transport
Sign in / Sign up

Export Citation Format

Share Document