Faculty of Science, Beijing University of Technology, Beijing, 100124, P. R. China.
Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Adv Mater. 2023 Jun;35(22):e2300360. doi: 10.1002/adma.202300360. Epub 2023 Apr 6.
Multifunction-integrated semitransparent organic photovoltaic cells (STOPVs), with high power generation, colorful transmittance/reflectance, excellent ultraviolet (UV) protection, and thermal insulation, are fully in line with the concept of architectural aesthetics and photoprotection characteristics for building-integrated photovoltaic-window. For the indelible rainbow color photovoltaic window, one crucial issue is to realize the integration of these photons- and photoelectric-related multifunction. Herein, dynamic transmissive and reflective structural color controllable filters, with asymmetrical metal-insulator-metal (MIM) configurations (20 nm-Ag-HATCN-30 nm-Ag) through machine learning, are deliberately designed for colorful STOPV devices. This endows the resultant integrated devices with ≈5% enhanced power conversion efficiency (PCE) than the bare-STOPVs, gifted UV (300-400 nm) blocking rates as high as 93.5, 94.1, 90.2, and 94.5%, as well as a superior infrared radiation (IR) (700-1400 nm) rejection approaching 100% for transparent purple-, blue-, green- and red-STOPV cells, respectively. Most importantly, benefiting from the photonic recycling effect beyond microcavity resonance wavelength, a reported quantum utilization efficiency (QUE) as high as 80%, is first presented for the transparent-green-STOPVs with an ultra-narrow bandgap of 1.2 eV. These asymmetrical Febry-Pérot transmissive and reflective structural color filters can also be extended to silicon- and perovskite-based optoelectric devices and make it possible to integrate additional target optical functions for multi-purpose optoelectric devices.
多功能集成半透明有机光伏电池（STOPV）具有高发电效率、丰富多彩的透光率/反射率、优异的紫外线（UV）防护和隔热性能，完全符合建筑美学和光保护特性的理念，是建筑一体化光伏窗的理想选择。对于不可磨灭的彩虹色光伏窗，一个关键问题是实现这些光子和光电相关多功能的集成。在这里，通过机器学习设计了具有不对称金属-绝缘体-金属（MIM）结构（20nm-Ag-HATCN-30nm-Ag）的动态透光和反射结构色可控滤光片，用于彩色 STOPV 器件。这使得所得集成器件的功率转换效率（PCE）比裸 STOPV 器件提高了约 5%，具有高达 93.5%、94.1%、90.2%和 94.5%的紫外线（300-400nm）阻断率，以及高达 100%的优异红外辐射（IR）（700-1400nm）阻隔率，分别用于透明紫色、蓝色、绿色和红色 STOPV 电池。最重要的是，得益于光子回收效应，超过微腔共振波长，首次报道了透明绿色 STOPV 的量子利用效率（QUE）高达 80%，其带隙非常窄，为 1.2eV。这些不对称的法布里-珀罗透射和反射结构色滤波器也可以扩展到硅和钙钛矿基光电设备，并为多功能光电设备集成其他目标光学功能成为可能。
