1. The Effect of Multi‐Fields Synergy from Electric/Light/Thermal/Force Technologies on Photovoltaic Performance of Ba0.06Bi0.47Na0.47TiO3 Ferroelectric Ceramics via the Mg/Co Substitution at A/B Sites.
- Author
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Gao, Qingyuan, Yang, Shanming, Yuan, Changlai, Liu, Xiao, Zhao, Jingtai, Rao, Guanghui, Zhou, Changrong, Xu, Jiwen, Zhu, Baohua, and Lei, Wen
- Abstract
Currently, it is widely reported that the photovoltaic effect in ferroelectric materials can be promoted by the application of a piezoelectric force, an external electric field, and intense light illumination. Here, a semiconducting ferroelectric composition is introduced, (1−
x ) Ba0.06Bi0.47Na0.47TiO3‐x MgCoO3 (abbreviated asx MgCo, wherex = 0.02–0.08), synthesized through Mg/Co ions codoping. This process effectively narrows the optical bandgaps to a spectrum of 1.38–3.06 eV. Notably, the system exhibits a substantial increase in short‐circuit photocurrent density (J sc), by the synergy of the electric, light, and thermal fields. TheJ sc can still be further enhanced by the extra introduction of a force field. Additionally, theJ sc also shows an obvious increase after the high field pre‐poling. The generation of a considerable number of oxygen vacancies due to the Co2+/Co3+ mixed valence state (in a 1:3 ratio) contributes to the reduced optimal bandgap. The integration of Mg2+ ion at the A‐site restrains the loss and sustains robust ferroelectricity (P r = 24.1 µC cm−2), high polarizability under an electric field, and a significant piezoelectric coefficient (d 33 = 102 pC N−1). This study provides a novel perspective on the physical phenomena arising from the synergy of multiple fields in ferroelectric photovoltaic materials. [ABSTRACT FROM AUTHOR]- Published
- 2024
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