Photovoltaic effects in ferroelectrics have attracted much attention due to their potential of generating a large open-circuit voltage. Recently, we focus on an anomalous photovoltaic effect in ferroelectric liquid-crystalline (FLC) phase. In this work, we have synthesized FLC phenylterthiophene derivatives, whose carrier mobilities have different magnitudes. They show anomalous photovoltaic effects in their FLC phases. The photocurrent response is correlated with the carrier mobility and spontaneous polarization in the FLC phase instead of ionic impurities.