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<p>BNT ceramics, a well-known ferroelectric material, demonstrate a unique bulk photovoltaic effect. Based on the excellent ferroelectric properties of BNT, we successfully synthesized (1−<i>x</i>)Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub>-<i>x</i>Ba(Mn<sub>0.5</sub>Ti<sub>0.5</sub>)O<sub>3−<i>δ</i></sub> (BNT-BMT) ceramics (<i>x</i> = 0.00, 0.02, 0.04, 0.06, 0.08&#xa0;mol) by doping of Ba/Mn ions. These ceramics exhibited a significantly reduced optical bandgap (<i>E</i><sub>g</sub>, 0.89–2.95&#xa0;eV) and were found to be in the morphotropic phase boundary (MPB) region when <i>x</i> = 0.06. Notably, this system achieved an optimal piezoelectric constant and a short-circuit photocurrent density (<i>J</i><sub>sc</sub>) in the MPB region (<i>d</i><sub>33</sub> = 145&#xa0;pC/N, <i>J</i><sub>sc</sub> = 394.04&#xa0;nA/cm<sup>2</sup>). Through the synergistic effects of electric, light, and thermal fields, the <i>J</i><sub>sc</sub> value reached a maximum of 1762&#xa0;nA/cm<sup>2</sup>. Interestingly, with the applied force field combined with the electric, light, and thermal fields, the <i>J</i><sub>sc</sub> value was further increased to 1840&#xa0;nA/cm<sup>2</sup>. These findings provide a new approach for enhancing the photovoltaic performance of ferroelectric materials and have the potential to broaden their applications in optoelectronic devices.</p> Graphical Abstract <p></p>

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Synergistic Effect of Multiple Fields on Photovoltaic Performance in (1−x) Bi0.5Na0.5TiO3-xBa (Mn0.5Ti0.5) O3−δ Ceramics at the Morphotropic Phase Boundary

  • 期刊论文

  • 发表日期：

    2025年3月23日

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  • Qingyuan Gao,
  • Shanming Yang,
  • Changlai Yuan,
  • Xiao Liu,
  • Guanghui Rao

摘要

BNT ceramics, a well-known ferroelectric material, demonstrate a unique bulk photovoltaic effect. Based on the excellent ferroelectric properties of BNT, we successfully synthesized (1−x)Bi0.5Na0.5TiO3-xBa(Mn0.5Ti0.5)O3−δ (BNT-BMT) ceramics (x = 0.00, 0.02, 0.04, 0.06, 0.08 mol) by doping of Ba/Mn ions. These ceramics exhibited a significantly reduced optical bandgap (Eg, 0.89–2.95 eV) and were found to be in the morphotropic phase boundary (MPB) region when x = 0.06. Notably, this system achieved an optimal piezoelectric constant and a short-circuit photocurrent density (Jsc) in the MPB region (d33 = 145 pC/N, Jsc = 394.04 nA/cm2). Through the synergistic effects of electric, light, and thermal fields, the Jsc value reached a maximum of 1762 nA/cm2. Interestingly, with the applied force field combined with the electric, light, and thermal fields, the Jsc value was further increased to 1840 nA/cm2. These findings provide a new approach for enhancing the photovoltaic performance of ferroelectric materials and have the potential to broaden their applications in optoelectronic devices.

Graphical Abstract