Low Band Gap Thiophene−Perylene Diimide Systems with Tunable Charge Transport Properties

Perylenediimide−pentathiophene systems with varied architecture of thiophene units were synthesized. The photophysical, electrochemical, and charge transport behavior of the synthesized compounds were studied. Both molecules showed a low band gap of ∼1.4 eV. Surprisingly, the molecule with pentathio...

Full description

Saved in:
Bibliographic Details
Published in:Organic letters 2011-01, Vol.13 (1), p.18-21
Main Authors: Balaji, Ganapathy, Kale, Tejaswini S, Keerthi, Ashok, Della Pelle, Andrea M, Thayumanavan, S, Valiyaveettil, Suresh
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Perylenediimide−pentathiophene systems with varied architecture of thiophene units were synthesized. The photophysical, electrochemical, and charge transport behavior of the synthesized compounds were studied. Both molecules showed a low band gap of ∼1.4 eV. Surprisingly, the molecule with pentathiophene attached via β-position to the PDI unit upon annealing showed a predominant hole mobility of 1 × 10−4 cm2 V−1 s−1 whereas the compound with branched pentathiophene attached via β-position showed an electron mobility of 9.8 × 10−7 cm2 V−1 s−1. This suggests that charge transport properties can be tuned by simply varying the architecture of pentathiophene units.
ISSN:1523-7060
1523-7052
DOI:10.1021/ol1023486