Xu Tao, Luo Yiran, Wu Shiwei, Deng Baozhong, Chen Shi, Zhong Yunbo, Wang Shenghao, Lévêque Gaëtan, Bachelot Renaud, Zhu Furong
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China.
School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China.
Adv Sci (Weinh). 2022 Sep;9(26):e2202150. doi: 10.1002/advs.202202150. Epub 2022 Jul 17.
Semitransparent organic solar cells (ST-OSCs) offer potentially more opportunities in areas of self-powered greenhouses and building-integrated photovoltaic systems. In this work, the effort to use a combination of solution-processable gold nanobipyramids (AuNBPs)-based hole transporting layer and a low/high dielectric constant double layer optical coupling layer (OCL) for improving the performance of ST-OSCs over the two competing indexes of power conversion efficiency (PCE) and average visible transmittance (AVT) is reported. The fabrication and characterization of the ST-OSCs are guided, at design and analyses level, using the theoretical simulation and experimental optimization. The use of a low/high dielectric constant double layer OCL helps enhancing the visible light transparency while reflecting the near-infrared (NIR) photons back into the photoactive layer for light harvesting. NIR absorption enhancement in the ST-OSCs is realized through the AuNBPs-induced localized surface plasmon resonance (LSPR). The weight ratio of the polymer donor to nonfullerene acceptor in the bulk heterojunction is adjusted to realize the maximum NIR absorption enhancement, enabled by the AuNBPs-induced LSPR, achieving the high-performance ST-OSCs with a high PCE of 13.15% and a high AVT of 25.9%.
半透明有机太阳能电池(ST-OSCs)在自供电温室和建筑集成光伏系统领域提供了更多潜在机会。在这项工作中,报道了努力使用基于溶液可加工的金纳米双棱锥(AuNBPs)的空穴传输层和低/高介电常数双层光学耦合层(OCL)的组合,以在功率转换效率(PCE)和平均可见光透过率(AVT)这两个竞争指标上提高ST-OSCs的性能。在设计和分析层面,利用理论模拟和实验优化来指导ST-OSCs的制备和表征。使用低/高介电常数双层OCL有助于提高可见光透明度,同时将近红外(NIR)光子反射回光活性层以进行光捕获。通过AuNBPs诱导的局域表面等离子体共振(LSPR)实现了ST-OSCs中近红外吸收的增强。调节本体异质结中聚合物供体与非富勒烯受体的重量比,以实现由AuNBPs诱导的LSPR实现的最大近红外吸收增强,从而获得高性能的ST-OSCs,其具有13.15%的高PCE和25.9%的高AVT。