Improving organic thin-film transistor performance by nanoimprint-induced chain ordering
Improving organic thin-film transistor performance by nanoimprint-induced chain ordering
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通过纳米压印诱导链有序提高有机薄膜晶体管性能
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
Xing Cheng
中科院分区：
文献类型：
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作者：
D. Cui;Huifeng Li;Hyun;Xing Cheng
共轭聚合物薄膜中的链构型对聚合物半导体的电子和光学性能有重要影响，进而决定了聚合物电子器件的性能。本文提出了一种利用直接纳米压印控制聚合物半导体链取向的新方法。纳米印迹诱导的共轭聚合物链取向在图图化微结构中具有很强的光学双折射特性。随着纳米压印温度的升高，图案薄膜的x射线衍射显示出更高的链有序水平。在较高的纳米压印温度下，极化吸收光谱呈现递进红移。基于纳米压印光栅的薄膜晶体管的载流子迁移率是无图案晶体管的12倍。在所有的共轭聚合物结构和纳米压印器件中都观察到材料性能和器件性能的各向异性。预计这种独特的控制链取向的能力将使纳米impri…
The chain configuration in conjugated polymer films has a significant impact on the electronic and optical properties of polymer semiconductors, which in turn dictate the device performances of polymer electronics. This article presents a new method to control chain orientation in polymer semiconductors by direct nanoimprint. Nanoimprint-induced chain orientation in conjugated polymer imparts strong optical birefringence in patterned microstructures. X-ray diffraction on patterned films exhibits higher level of chain ordering as nanoimprint temperature increases. Polarized absorption spectra show progressive redshift at higher nanoimprint temperature. The carrier mobility in thin-film transistors based on nanoimprinted grating equals to 12 times of that without patterning. Anisotropies of material properties and device performance are observed in all conjugated polymer structures and devices patterned by nanoimprint. It is expected that the unique ability to control chain orientation will enable nanoimpri...