Carrier dynamics in alpha-octithiophene solids: Comparison of the transient photoconductivity and excited-state absorption in single-crystal and polycrystalline film

Authors
Moses, D Wang, J Dogariu, A Fichou, D Videlot, C
Citation
D. Moses et al., Carrier dynamics in alpha-octithiophene solids: Comparison of the transient photoconductivity and excited-state absorption in single-crystal and polycrystalline film, PHYS REV B, 59(11), 1999, pp. 7715-7718
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
59
Issue
11
Year of publication
1999
Pages
7715 - 7718
Database
ISI
SICI code
0163-1829(19990315)59:11<7715:CDIASC>2.0.ZU;2-#
Abstract
We demonstrate that the transient photoconductivity, photoluminescence, and excited-state absorption (PA) in single-crystal alpha-octithiophene (8T) a re radically different from those in 8T-oriented polycrystalline film. Thes e observations suggest that structural disorder in the 8T system introduces sub-band-gap energy levels that reduce the photocurrent lifetime, facilita te radiative transitions in the near-IR region, and enhance PA. [S0163-1829 (99)04711-6].