Abstract
A new solid solution of (1−x) Bi0.5Na0.5TiO3–x BaCo0.5Nb0.5O3 (BNT-BCN; x = 0, 0.05, 0.10, 0.15, 0.20) were fabricated via the solid-state route. All the samples reflect single perovskite structure and normal ferroelectric behavior. The lowest band gap ~0.92 eV of Bi0.5Na0.5TiO3 doped with BaCo0.5Nb0.5O3 is achieved. Under simulated standard sunlight, the short-circuit photocurrent (Jsc) of ~34.15 µA/cm2 and open-circuit photovoltage (Voc) of ~10.24 V in the 0.90BNT-0.10BCN ceramic after the polarization of 60 kV/cm are obtained, which is much higher than that of the most perovskite-oxide ceramics. The power conversion efficiency of the 0.90BNT-0.10BCN is about 0.17%. The current system shows considerable advantages in the field of high-stability photovoltaic devices.
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