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

Volume

48

Issue

3

fYear

2012

fDate

3/1/2012 12:00:00 AM

Firstpage

425

Lastpage

432

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;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2011.2180515

Filename

6109302