The concept of multisource energy harvesting (of light, kinetic, and thermal energy) using a single material has recently been proposed. Herein, the realization of this novel concept is discussed and insight into the electric field‐assisted modulation of photocurrent and pyroelectric current in a bandgap‐engineered ferroelectric KNBNNO ((K_0.5Na_0.5)NbO₃‐2 mol% Ba(Ni_0.5Nb_0.5)O_3−δ) is provided. Thereafter, direct current (DC) electrical modulation under the simultaneous inputs of light and thermal changes for photovoltaic and pyroelectric effects, respectively, is utilized to achieve several orders of increase in the output current density. This is attributed to a light‐assisted increase in the material's electrical conductivity and ferroelectric photovoltaic effect. The phenomena of electro–optic and thermo–electro–optic DC modulations are further used to propose two novel energy‐conversion cycles. The performance of both the proposed energy conversion cycles is compared with that of the Olsen cycle. The electro–optic and thermo–electro–optic cycles are found to harvest 7–10 times more energy than the Olsen cycle alone, respectively. Moreover, both energy‐conversion cycles offer broader flexibility and ease in operating conditions, thus paving a way toward the practical applications of multisource energy harvesting with a single material for enhanced energy‐conversion capability and device/system compactness.

中文翻译：

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铁电中的热光电效应联合以增强循环多能转换

最近提出了使用一种材料进行多源能量收集（光能，动能和热能）的概念。本文讨论了这一新颖概念的实现，并深入研究了带隙工程铁电体KNBNNO（（K _0.5 Na _0.5）NbO ₃ -2 mol％Ba（Ni _0.5 Nb _0.5）中电场辅助的光电流和热电流调制O _3−δ）。此后，分别在光和热变化的同时输入下分别对光伏和热电效应进行直流（DC）电调制，以实现输出电流密度的几个数量级的增加。这归因于材料的电导率和铁电光伏效应的光辅助增加。电光和热电光直流调制现象被进一步用于提出两个新的能量转换周期。将两个拟议的能量转换循环的性能与Olsen循环的性能进行了比较。发现电光和热电光循环分别比单独的Olsen循环多收集7-10倍的能量。此外，