MXene–organic semiconductor blends for high-mobility printed organic electronic devices

拟议的项目将耦合MXene和最先进的有机半导体晶体（OSCs）中的离域态电荷载流子输运，以实现通过印刷MXene/OSC共混物制造的高速电子器件。我们将合成含有MXenes和OSCs的油墨，这将使我们能够在柔性衬底上打印有机薄膜晶体管（OTFTs）。我们将探索基于[1]苯并噻吩[3,2-b][1]苯并噻吩（BTBT）和萘[2,3-b:2',3'-f]噻吩[3,2-b]噻吩（DNTT）支架的新型OSCs。MXenes将由以下化合物合成：Ti3AlC2， Nb2AlC和V2AlC。全印刷otft将包括MXene/ osc混合通道和MXene印刷触点。这些器件中载流子的迁移率将超过50 cm2/Vs，离子/ off比将达到105。为此，我们将对打印制备的共混层的形态、结构、能量和传输特性进行详细的多尺度表征。这些结果将为MXene/OSC界面微观界面环境下的电子性质和MXene/OSC共混物中的电荷传输的理论建模提供输入。模拟结果将反过来用于优化MXene/OSC共混物的合成方案和otft的制造。一旦层的性质得到优化和彻底的理论描述，otft将被打印出来，它们的制造协议将被优化，以产生最高的迁移率和开/关比。在整个项目中，重点将放在通过各种沟通渠道传播结果，这些渠道将面向领域内的专家、政策制定者、面向科学的青年个人和一般听众。联合体的合作伙伴涵盖了项目的所有相关领域。他们包括以下领域的专家：先进二维（2D）材料和高迁移率OSC的合成，2D材料/OSC界面电子特性的理论建模，以及先进有机电子器件的制造和表征。该项目是对几个石墨烯旗舰工作包（即WP1、WP3、WP9和WP13）中开展的活动的高度补充，因此它将为石墨烯旗舰工作提供广泛关注的新想法和投入。

The proposed project will couple delocalized-state charge-carrier transport in MXenes and in state-of-the-art organic semiconductor crystals (OSCs) to realize high-speed electronic devices fabricated by printing of MXene/OSC blends. We will synthesize inks comprising MXenes and OSCs, which will allow us to print organic thin film transistors (OTFTs) on flexible substrates. We will explore novel OSCs based on the [1]benzothieno[3,2-b][1]benzothiophene (BTBT) and dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophene (DNTT) scaffolds. MXenes will be synthesized from the following compounds: Ti3AlC2, Nb2AlC, and V2AlC. All-printed OTFTs will comprise MXene/OSC-blend channels and MXene printed contacts. The mobility of the charge carriers in these devices will exceed 50 cm2/Vs and the Ion/Ioff ratio will reach values of 105. Towards this end, we will perform detailed multiscale characterization of morphological, structural, energetic, and transport properties of the blend layers fabricated by printing. The results will serve as input for theoretical modelling of the electronic properties at the microscopic interface environment of the MXene/OSC interfaces and charge transport through the MXene/OSC blend. The modelling results will, in turn, serve to optimize the protocol of synthesis of MXene/OSC blends and fabrication of OTFTs. Once the properties of the layers are optimized and thoroughly theoretically described, OTFTs will be printed and their fabrication protocol will be optimized to yield the highest possible mobility and on/off ratio. Throughout the project strong emphasis will be devoted to dissemination of the results via a variety of communication channels which will address audiences ranging from experts in the field, policymakers, young science-oriented individuals and general audience. The partners of the consortium cover all pertinent areas of the project. They include experts in the areas of: synthesis of advanced two-dimensional (2D) materials and high-mobility OSCs, theoretical modelling of electronic properties of 2D–material/OSC interfaces, and fabrication and characterization of advanced organic electronic devices. The project is highly complementary to the activities carried out within several Graphene Flagship work packages, i.e. WP1, WP3, WP9 and WP13, thus it will offer new ideas and inputs of wide interest to the Graphene Flagship endeavour.