Gutierrez-Fernandez Edgar, Scaccabarozzi Alberto D, Basu Aniruddha, Solano Eduardo, Anthopoulos Thomas D, Martín Jaime
POLYMAT, University of the Basque Country, UPV/EHU, Av. de Tolosa 72, San Sebastián, 20018, Spain.
King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC), Thuwal, 23955, Saudi Arabia.
Adv Sci (Weinh). 2022 Jan;9(1):e2104977. doi: 10.1002/advs.202104977. Epub 2021 Dec 2.
There is a growing demand to attain organic materials with high electron mobility, μ , as current reliable reported values are significantly lower than those exhibited by their hole mobility counterparts. Here, it is shown that a well-known nonfullerene-acceptor commonly used in organic solar cells, that is, BTP-4F (aka Y6), enables solution-processed organic thin-film transistors (OTFT) with a μ as high as 2.4 cm V s . This value is comparable to those of state-of-the-art n-type OTFTs, opening up a plethora of new possibilities for this class of materials in the field of organic electronics. Such efficient charge transport is linked to a readily achievable highly ordered crystalline phase, whose peculiar structural properties are thoroughly discussed. This work proves that structurally ordered nonfullerene acceptors can exhibit intrinsically high mobility and introduces a new approach in the quest of high μ organic materials, as well as new guidelines for future materials design.
由于目前可靠报道的有机材料电子迁移率μ值明显低于其空穴迁移率对应值，因此对获得高电子迁移率的有机材料的需求日益增长。在此，研究表明，一种常用于有机太阳能电池的著名非富勒烯受体，即BTP - 4F（又名Y6），能够使溶液处理的有机薄膜晶体管（OTFT）的μ高达2.4 cm² V⁻¹ s⁻¹。该值与最先进的n型OTFT相当，为这类材料在有机电子领域开辟了众多新的可能性。这种高效的电荷传输与易于实现的高度有序晶相有关，文中对其独特的结构特性进行了深入讨论。这项工作证明，结构有序的非富勒烯受体可以表现出固有的高迁移率，并为寻找高μ有机材料引入了一种新方法，以及为未来材料设计提供了新的指导方针。
