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- Title
A strategy of enhancing photovoltaic response in K<sub>0.5</sub>Na<sub>0.5</sub>NbO<sub>3</sub> based ceramics.
- Authors
Peng, Zhanhui; Shi, Qiangqiang; Liu, Jianfei; Chen, Bi; Chai, Qizhen; Wang, Yuanhao; Liang, Pengfei; Wang, Juanjuan; Chao, Xiaolian; Yang, Zupei
- Abstract
Ferroelectric materials with photovoltaic effect have great potential application value in new solar cells, photodetectors and photoelectric memories. However, the low open circuit voltage and conversion efficiency resulted from large band gap width limit its further practical application. In this work, an effective strategy of enhancing photovoltaic response was explored by adjusting band gap width in K0.5Na0.5NbO3 (KNN) based ceramics. (1−x)K0.5Na0.5NbO3−xLa(Mn0.5Ni0.5)O3 (KNN−xLMN; x = 0, 0.10, 0.15, 0.20) ceramics were successfully fabricated by a solid state method. The enhanced photovoltaic response with the short-circuit current density Jsc ~ 331.32 nA/cm2 and the open-circuit voltage Voc ~ 0.65 V was collected at a LMN doping level of 0.15, which was closely related to the suppressed band gap width and enhanced symmetry of crystal structure due to the fine and uniform grains that formed upon LMN doping. The findings reported in this work not only explored the photovoltaic performance of a new lead-free KNN ferroelectric material, but also provided valuable insights on how to improve the photovoltaic effect in traditional bulk ferroelectric materials.
- Publication
Journal of Materials Science: Materials in Electronics, 2023, Vol 34, Issue 16, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-023-10669-3