A Method for Growing Organic Semiconductor Crystals in Limited Area

Abstract

通过预先采用真空蒸镀法在特定位置植入晶核，可以调控有机半导体晶体在后续物理气相传输过程中在特定位置生长。通过热处理和溶剂涮洗可以有效降低晶核的密度，从而实现了大面积有机半导体晶体阵列的制备。基于所得到的有机半导体晶体，用转移金膜的方法制备了底栅顶接触的有机场效应晶体管，器件的迁移率为1.48 cm2 V−1s−1。 By seeding crystal nucleus in specific place via thermal evaporation in advance, organic semiconductor crystals could be controlled to deposit at corresponding place in the latter physical vapor transport process. Large arrays of organic semiconductor crystals are produced by using this method. By optimizing the density of crystal nucleus through thermal annealing or rinsing in solvent, arrays with desired crystal density on specific locations are realized. Field-effect transistors based on the obtained organic semiconductor crystals are fabricated with bottom-gate top-contact configuration using the method of transferring Au film. The devices show good performance with mobility of 1.48 cm2 V−1 s−1.