In this work, the (1−x)Bi_0.5Na_0.5TiO₃-xBaNi_0.5Nb_0.5O₃ (BNT-BNN; 0.00 ⩽ x ⩽ 0.20) ceramics were prepared via a high-temperature solid-state method. The crystalline structures, photovoltaic effect, and electrical properties of the ceramics were investigated. According to X-ray diffraction, the system shows a single perovskite structure. The samples show the normal ferroelectric loops. With the increase of BNN content, the remnant polarization (P_r) and coercive field (E_c) decrease gradually. The optical band gap of the samples narrows from 3.10 to 2.27 eV. The conductive species of grains and grain boundaries in the ceramics are ascribed to the double ionized oxygen vacancies. The open-circuit voltage (V_oc) of ∼15.7 V and short-circuit current (J_sc) of ∼1450 nA/cm² are obtained in the 0.95BNT-0.05BNN ceramic under 1 sun illumination (AM1.5G, 100 mW/cm²). A larger V_oc of 23 V and a higher J_sc of 5500 nA/cm² are achieved at the poling field of 60 kV/cm under the same light conditions. The study shows this system has great application prospects in the photovoltaic field.

在这项工作中，（1- X）的Bi _0.5的Na _0.5的TiO ₃ - X BANI _0.5的Nb _0.5 ø ₃（BNT-BNN; 0.00⩽ X ⩽0.20）陶瓷进行了通过高温固态方法制备。研究了陶瓷的晶体结构、光伏效应和电学性能。根据 X 射线衍射，该系统显示出单一的钙钛矿结构。样品显示了正常的铁电回路。随着 BNN 含量的增加，剩余极化 ( P _r ) 和矫顽场 ( E _c) 逐渐减少。样品的光学带隙从 3.10 eV 缩小到 2.27 eV。陶瓷中晶粒和晶界的导电物质归因于双电离氧空位。0.95BNT-0.05BNN 陶瓷在 1 次阳光照射下（AM1.5G，100 mW ）获得了 ~15.7 V的开路电压 ( V _oc ) 和 ~ 1450 nA/cm ²的短路电流 ( J _sc ) /厘米²）。在相同光照条件下，在 60 kV/cm 的极化场下实现了 23 V 的更大V _oc和5500 nA/cm ²的更高J _sc。研究表明，该系统在光伏领域具有很大的应用前景。