Xu Tao, Deng Baozhong, Zheng Kaiwen, Li Hongyu, Wang Zihan, Zhong Yunbo, Zhang Chengxi, Lévêque Gaëtan, Grandidier Bruno, Bachelot Renaud, Treguer-Delapierre Mona, Qi Yabing, Wang Shenghao
School of Microelectronics and Materials Genome Institute, Shanghai University, Shanghai, 200444, China.
School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China.
Adv Mater. 2024 May;36(18):e2311305. doi: 10.1002/adma.202311305. Epub 2024 Feb 2.
Semitransparent organic photovoltaics (ST-OPVs) offer promising prospects for application in building-integrated photovoltaic systems and greenhouses, but further improvement of their performance faces a delicate trade-off between the two competing indexes of power conversion efficiency (PCE) and average visible transmittance (AVT). Herein, the authors take advantage of coupling plasmonics with the optical design of ST-OPVs to enhance near-infrared absorption and hence simultaneously improve efficiency and visible transparency to the maximum extent. By integrating core-bishell PdCu@Au@SiO nanotripods that act as optically isotropic Lambertian sources with near-infrared-customized localized surface plasmon resonance in an optimal ternary PM6:BTP-eC9:L8-BO-based ST-OPV, it is shown that their interplay with a multilayer optical coupling layer, consisting of ZnS(130 nm)/NaAlF(60 nm)/WO(100 nm)/LaF(50 nm) identified from high-throughput optical screening, leads to a record-high PCE of 16.14% (certified as 15.90%) along with an excellent AVT of 33.02%. The strong enhancement of the light utilization efficiency by ≈50% as compared to the counterpart device without optical engineering provides an encouraging and universal pathway for promoting breakthroughs in ST-OPVs from meticulous optical design.
半透明有机光伏电池（ST-OPV）在建筑一体化光伏系统和温室应用方面展现出了广阔前景，但要进一步提升其性能，需在功率转换效率（PCE）和平均可见光透过率（AVT）这两个相互竞争的指标之间进行精细权衡。在此，作者利用等离子体激元与ST-OPV的光学设计相结合，以增强近红外吸收，从而在最大程度上同时提高效率和可见光透明度。通过将作为光学各向同性朗伯源的核壳结构PdCu@Au@SiO纳米三脚架与基于三元PM6:BTP-eC9:L8-BO的ST-OPV中的近红外定制局域表面等离子体共振相结合，研究表明，它们与通过高通量光学筛选确定的由ZnS（130纳米）/NaAlF（60纳米）/WO（100纳米）/LaF（50纳米）组成的多层光学耦合层的相互作用，实现了创纪录的16.14%的高功率转换效率（经认证为15.90%）以及33.02%的出色平均可见光透过率。与未进行光学工程设计的对照器件相比，光利用效率提高了约50%，这为通过精细光学设计推动ST-OPV取得突破提供了一条令人鼓舞且通用的途径。
