The efficiency and stability have been the focus of research on non-fullerene batteries in recent years. In this work, a new phenamidazole-based small molecule material TPPI-TPE has been utilized as the third component to constuct ternary organic solar cells (OSCs). The introduction of TPPI-TPE can not only strengthen the light absorption of the blend films, but also optimize the morphology of the active layers. In PTB7-Th:ITIC system, when the doping ratio of TPPI-TPE is 10 wt%, the corresponding ternary device obtained the highest power conversion efficiency (PCE) up to 9.50%, which represented a ~20% enhancement in comparison with the control binary device (7.88%). In PTO2: IT-4F system, at the optimal ratio, the device achieved 13.59% PCE, which means TPPI-TPE can optimize device performance in a variety of systems. It's worth noting that the optimal ternary device possessed better thermal, light irradiation, and air stability than the binary device. When stored in the dark atmosphere without encapsulation at the temperature of ~25 °C and the humidity of ~23%, the PCE of the ternary device remained 81% of its original state after 10 days, while that of the binary device was only 43%. Our work provides a simple and effective way to further improving the efficiency and stability of binary non-fullerene solar cells.

近年来，效率和稳定性一直是非富勒烯电池研究的重点。在这项工作中，一种新的基于苯并咪唑的小分子材料TPPI-TPE已被用作构成三元有机太阳能电池（OSC）的第三种成分。TPPI-TPE的引入不仅可以增强共混膜的光吸收，而且可以优化活性层的形貌。在PTB7-Th：ITIC系统中，当TPPI-TPE的掺杂比例为10 wt％时，相应的三元器件获得的最高功率转换效率（PCE）高达9.50％，与之相比提高了约20％。控制二进制设备（7.88％）。在PTO2：IT-4F系统中，该器件以最佳比例实现了13.59％的PCE，这意味着TPPI-TPE可以优化各种系统中的器件性能。它' 值得注意的是，最佳的三元器件比二元器件具有更好的热，光辐照和空气稳定性。当在约25°C的温度和约23％的湿度下于无密封的黑暗环境中存储时，三元器件的PCE在10天后仍保持其原始状态的81％，而二元器件的PCE仅为43 ％。我们的工作为进一步提高二元非富勒烯太阳能电池的效率和稳定性提供了一种简单有效的方法。