Liu Yao, Sheri Madhu, Cole Marcus D, Yu Duk Man, Emrick Todd, Russell Thomas P
Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Polymer Science and Engineering Department, University of Massachusetts Amherst, 120 Governors Drive, Amherst, MA, 01003, USA.
Angew Chem Int Ed Engl. 2019 Apr 16;58(17):5677-5681. doi: 10.1002/anie.201901536. Epub 2019 Mar 26.
A new and highly efficient cathode interlayer material for organic photovoltaics (OPVs) was produced by integrating C fullerene monomers into ionene polymers. The power of these novel "C -ionenes" for interface modification enables the use of numerous high work-function metals (e.g., silver, copper, and gold) as the cathode in efficient OPV devices. C -ionene boosted power conversion efficiencies (PCEs) of solar cells, fabricated with silver cathodes, from 2.79 % to 10.51 % for devices with a fullerene acceptor in the active layer, and from 3.89 % to 11.04 % for devices with a non-fullerene acceptor in the active layer, demonstrating the versatility of this interfacial layer. The introduction of fullerene moieties dramatically improved the conductivity of ionene polymers, affording devices with high efficiency by reducing charge accumulation at the cathode/active layer interface. The power of C -ionene to improve electron injection and extraction between metal electrodes and organic semiconductors highlights its promise to overcome energy barriers at the hard-soft materials interface to the benefit of organic electronics.
通过将C富勒烯单体整合到紫罗碱聚合物中，制备出了一种用于有机光伏（OPV）的新型高效阴极夹层材料。这些新型“C-紫罗碱”用于界面修饰的能力，使得众多高功函数金属（如银、铜和金）能够用作高效OPV器件的阴极。对于有源层中含有富勒烯受体的器件，C-紫罗碱提高了以银为阴极制备的太阳能电池的功率转换效率（PCE），从2.79%提高到10.51%；对于有源层中含有非富勒烯受体的器件，功率转换效率从3.89%提高到11.04%，证明了该界面层的通用性。富勒烯部分的引入显著提高了紫罗碱聚合物的导电性，通过减少阴极/有源层界面处的电荷积累，实现了器件的高效率。C-紫罗碱改善金属电极与有机半导体之间电子注入和提取的能力，突出了其克服硬-软材料界面处能垒以造福有机电子学的前景。
