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.

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Title: 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.
Authors: Gao, Qingyuan1 (AUTHOR), Yang, Shanming1 (AUTHOR), Yuan, Changlai1 (AUTHOR) yuanchanglai@guet.edu.cn, Liu, Xiao1 (AUTHOR) xiaoliucsu@yahoo.com, Rao, Guanghui1 (AUTHOR) rgh@guet.edu.cn
Source: Journal of Electronic Materials. May2025, Vol. 54 Issue 5, p3887-3897. 11p.
Subjects: Morphotropic phase boundaries, Ferroelectric materials, Photovoltaic effect, Electric fields, Optoelectronic devices
Abstract: 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. [ABSTRACT FROM AUTHOR]
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Abstract: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. [ABSTRACT FROM AUTHOR]
ISSN:03615235
DOI:10.1007/s11664-025-11860-4