A Facile Photo-cross-linking Method for Polymer Gate Dielectrics and Their Applications in Fully Solution Processed Low Voltage Organic Field-effect Transistors on Plastic Substrate
A Facile Photo-cross-linking Method for Polymer Gate Dielectrics and Their Applications in Fully Solution Processed Low Voltage Organic Field-effect Transistors on Plastic Substrate
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聚合物栅极电介质的简便光交联方法及其在塑料基板上全溶液加工低压有机场效应晶体管中的应用
DOI：
10.1007/s10118-018-2110-2
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发表时间：
2018-01
影响因子：
4.3
通讯作者：
Zhang Qing
中科院分区：
文献类型：
--
作者：
Liu Ying;Zhao Jia Qing;Sun Wen Jian;Huang Yu Kun;Chen Su Jie;Guo Xiao Jun;Zhang Qing
提出了一种简单有效的聚合物栅介质光化学交联方法。避免了繁琐的合成过程，使具有光交联基的聚合物介电材料功能化。通过简单的溶液共混方法将光交联剂BBP-4加入到主体聚合物中，在紫外光照射下，能够从含有活性C-H基团的聚合物中提取氢原子。用较长波长的紫外光(365 Nm)即可完成交联。该方法已应用于甲基丙烯酸酯和苯乙烯类聚合物，如商品聚甲基丙烯酸甲酯(PMMA)、聚(甲基丙烯酸异丁酯)(PiBMA)和聚(4-甲基苯乙烯)(PMS)。交联网络提高了薄膜的介电性能和耐溶剂性。在塑料衬底上制作了全溶液工艺的底栅有源场效应晶体管(OFET)。在相对较小的栅介质电容下，器件表现出较低的工作电压和陡峭的亚阈值摆幅。
A simple and effective photochemical method was developed for cross-linking of polymer gate dielectrics. Laborious synthetic processes for functionalizing polymer dielectrics with photo-cross-linkable groups were avoided. The photo-cross-linker, BBP-4, was added into host polymers by simple solution blending process, which was capable of abstracting hydrogen atoms from polymers containing active C―H groups upon exposure to ultraviolet (UV) radiation. The cross-linking can be completed with a relatively long wavelength UV light (365 nm). The approach has been applied to methacrylate and styrenic polymers such as commercial poly(methylmethacrylate) (PMMA), poly(iso-butylmethacrylate) (PiBMA) and poly(4-methylstyrene) (PMS). The cross-linked networks enhanced dielectric properties and solvent resistance of the thin films. The bottom-gate organic field-effect transistors (OFETs) through all solution processes on plastic substrate were fabricated. The OFET devices showed low voltage operation and steep subthreshold swing at relatively small gate dielectric capacitance.
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