Low Band Gap Thiophene−Perylene Diimide Systems with Tunable Charge Transport Properties
摘要:
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 similar to 1.4 eV. Surprisingly, the molecule with pentathiophene attached via beta-position to the PDI unit upon annealing showed a predominant hole mobility of 1 x 10(-4) cm(2) V-1 s(-1) whereas the compound with branched pentathiophene attached via beta-position showed an electron mobility of 9.8 x 10(-7) cm(2) V-1 s(-1). This suggests that charge transport properties can be tuned by simply varying the architecture of pentathiophene units.
Low Band Gap Thiophene−Perylene Diimide Systems with Tunable Charge Transport Properties
摘要:
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 similar to 1.4 eV. Surprisingly, the molecule with pentathiophene attached via beta-position to the PDI unit upon annealing showed a predominant hole mobility of 1 x 10(-4) cm(2) V-1 s(-1) whereas the compound with branched pentathiophene attached via beta-position showed an electron mobility of 9.8 x 10(-7) cm(2) V-1 s(-1). This suggests that charge transport properties can be tuned by simply varying the architecture of pentathiophene units.