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Polymer single crystal dielectrics for organic field-effect transistors
Polymer ( IF 4.6 ) Pub Date : 2018-01-08 , DOI: 10.1016/j.polymer.2018.01.020
Yuhui Yang , Hongzheng Chen , Hanying Li

Single crystal dielectrics are ideal candidates for high-performance organic field-effect transistors (OFETs) due to the ordered molecular packing and smooth surface. However, it doesn't obtain much attention due to the lack of facile preparation methods. Here, solution-grown smooth poly(ε-caprolactone) (PCL) single crystals with width in tens of microns are obtained and used as the dielectric for the OFETs. The interface between the semiconductor and the PCL single crystal dielectrics are more favorable to the charge carrier transport than spin-coated PCL thin-film dielectrics, exhibiting much higher charge mobility. With 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-pentacene) single crystal as semiconductor layer, the average OFET mobility reaches up to 1.70 ± 0.97 cm2V−1s−1 with the highest value of 4.95 cm2V−1s−1. This result demonstrated that structural ordering of the polymer dielectrics is critical to further advance the performance of OFET devices.



中文翻译:

有机场效应晶体管的聚合物单晶电介质

由于有序的分子堆积和光滑的表面,单晶电介质是高性能有机场效应晶体管(OFET)的理想选择。但是,由于缺乏简便的制备方法,因此没有引起足够的重视。在此,获得了溶液生长的,宽度为数十微米的光滑聚(ε-己内酯)(PCL)单晶,并将其用作OFET的电介质。半导体和PCL单晶电介质之间的界面比旋涂PCL薄膜电介质更有利于电荷载流子传输,表现出更高的电荷迁移率。以6,13-​​双(三异丙基甲硅烷基乙炔基)-并五苯(TIPS-并五苯)单晶作为半导体层,平均OFET迁移率高达1.70±0.97 cm 2 V-1 s -1的最大值为4.95 cm 2 V -1 s -1。该结果表明,聚合物电介质的结构有序化对于进一步提高OFET器件的性能至关重要。

更新日期:2018-01-08
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