Ferroelectric liquid-crystalline semiconductors based on a phenylterthiophene skeleton: effect of the introduction of oligosiloxane moieties and photovoltaic effect?
Journal of Materials Chemistry C Pub Date: 2014-12-17 DOI: 10.1039/C4TC01690D
Abstract
Ferroelectric liquid-crystalline phenylterthiophene derivatives bearing a decenyl group, disiloxane chain, and cyclotetrasiloxane ring were synthesized. These compounds exhibited a chiral smectic C (SmC*) phase. The spontaneous polarizations of the compounds exceeded 50 nC cm?2. The hole mobilities determined by the time-of-flight method were in the order of 1 × 10?4 cm2 V?1 s?1. The compound with a decenyl group exhibited an anomalous photovoltaic effect in the SmC* phase although the conversion efficiency was lower than 0.01%. Notably, even the compound bearing a bulky cyclotetrasiloxane ring exhibited an enantiotropic SmC* phase.
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Journal Name：Journal of Materials Chemistry C
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