Title :
Investigation of Polaron Pair Dynamics in Poly(3-Hexylthiophene) Film by Time Resolved Spectroscopy
Author :
Gao, Bing-Rong ; Wang, Hai-Yu ; Wang, Hai ; Yang, Zhi-Yong ; Wang, Lei ; Jiang, Ying ; Hao, Ya-Wei ; Chen, Qi-Dai ; Sun, Hong-Bo
Author_Institution :
State Key Lab. on Integrated Optoelectron., Jilin Univ., Changchun, China
fDate :
3/1/2012 12:00:00 AM
Abstract :
Polaron pair dynamics in regioregular Poly (3-hexylthiophene) (RR-P3HT) film was studied by applying both femtosecond transient absorption and fluorescence up-conversion techniques. The comparison of the dynamics of the pure fluorescence, the ground state bleaching recovery and the polaron pair absorption reveals that the polaron pairs decay back to the ground state of certain morphological places with distinct absorption features, instead of the singlet excited state.
Keywords :
fluorescence; high-speed optical techniques; infrared spectra; optical saturable absorption; polarons; polymer films; time resolved spectra; visible spectra; absorption features; femtosecond transient absorption; fluorescence up-conversion technique; ground state bleaching recovery; morphological places; polaron pair dynamics; poly(3-hexylthiophene) film; regioregular polymers; time resolved spectroscopy; Absorption; Excitons; Films; Fluorescence; Laser excitation; Stationary state; Transient analysis; Fluorescence up-conversion; morphology; polaron pair; transient absorption;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2011.2180515
