Solution-printed organic semiconductors have emerged in recent years as promising contenders for roll-to-roll manufacturing of electronic and optoelectronic circuits. The stringent performance requirements for organic thin-film transistors (OTFTs) in terms of carrier mobility, switching speed, turn-on voltage and uniformity over large areas require performance currently achieved by organic single-crystal devices, but these suffer from scale-up challenges. Here we present a new method based on blade coating of a blend of conjugated small molecules and amorphous insulating polymers to produce OTFTs with consistently excellent performance characteristics (carrier mobility as high as 6.7 cm2 V−1 s−1, low threshold voltages of<1 V and low subthreshold swings <0.5 V dec−1). Our findings demonstrate that careful control over phase separation and crystallization can yield solution-printed polycrystalline organic semiconductor films with transport properties and other figures of merit on par with their single-crystal counterparts.
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机译：近年来，溶液印刷有机半导体已经成为电子和光电子电路的卷对卷制造的有前途的竞争者。在载流子迁移率，开关速度，导通电压和大面积均匀性方面对有机薄膜晶体管（OTFT）的严格性能要求，目前需要有机单晶器件实现的性能，但这些都面临着规模扩大的挑战。在这里，我们提出一种基于叶片共轭小分子和非晶态绝缘聚合物共混物的新方法，以生产具有始终如一的出色性能特征（载流子迁移率高达6.7 cm 2 V - 1 s -1 ，低阈值电压<1 V和低亚阈值摆幅<0.5 V dec -1 ）。我们的发现表明，对相分离和结晶的仔细控制可以产生溶液传输的多晶有机半导体薄膜，该薄膜具有传输特性和其他品质因数，与单晶对应物相当。
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