Wang Di, Qin Ran, Zhou Guanqing, Li Xue, Xia Ruoxi, Li Yuhao, Zhan Lingling, Zhu Haiming, Lu Xinhui, Yip Hin-Lap, Chen Hongzheng, Li Chang-Zhi
State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China.
Adv Mater. 2020 Aug;32(32):e2001621. doi: 10.1002/adma.202001621. Epub 2020 Jul 1.
Clean energy production and saving play vital impacts on the sustainability of the global community. Herein, high-performance semitransparent organic solar cells (ST-OSCs) with excellent features of power generation, being see-through, and infrared reflection of heat dissipation, with promising perspectives for building-integrated photovoltaics (BIPVs) are reported. To simultaneously improve average visible transmittance (AVT) and power conversion efficiency (PCE), formally in a trade-off relationship, of ST-OSCs, new ternary blends with alloy-like near-infrared (NIR) acceptors are employed, which are effective to improve device efficiency while maintaining visible absorption unchanged, resulting in PCEs of 16.8% for opaque devices and 13.1% for semitransparent OSCs (AVT of 22.4% and infrared photon radiation rejection (IRR) of 77%). Further, multifunctional ST-OSCs are realized via introducing simple, yet effective photonic reflectors, together with optical simulation, leading to not only perfect fitting of the visible transmittance peak (555 nm) to the photopic response of the human eye but also an excellent IRR of 90% (780-2500 nm), along with 23% AVT and over 12% PCE. This is thought to be the best-performing multifunctional ST-OSC with promising prospects as BIPVs in terms of power generation, heat dissipation, and being see-through.
清洁能源的生产和节约对全球社会的可持续发展具有至关重要的影响。在此，报道了具有发电、透明和红外散热反射等优异特性的高性能半透明有机太阳能电池（ST-OSCs），其在建筑一体化光伏（BIPV）方面具有广阔前景。为了同时提高ST-OSCs通常呈权衡关系的平均可见光透过率（AVT）和功率转换效率（PCE），采用了含类合金近红外（NIR）受体的新型三元共混物，其在保持可见光吸收不变的情况下有效提高了器件效率，使得不透明器件的PCE达到16.8%，半透明OSCs的PCE达到13.1%（AVT为22.4%，红外光子辐射抑制率（IRR）为77%）。此外，通过引入简单而有效的光子反射器并结合光学模拟实现了多功能ST-OSCs，不仅使可见光透过率峰值（555nm）与人类眼睛的明视觉响应完美匹配，而且还具有90%（780 - 2500nm）的优异IRR，以及23%的AVT和超过12%的PCE。就发电、散热和透明性而言，这被认为是作为BIPV具有广阔前景的性能最佳的多功能ST-OSC。
