Enhanced performance of ferroelectric-based all organic capacitors and transistors through choice of solvent
Enhanced performance of ferroelectric-based all organic capacitors and transistors through choice of solvent
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DOI：
10.1063/1.4880119
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发表时间：
2014-06-09
影响因子：
4
通讯作者：
Guha, S.
中科院分区：
文献类型：
--
作者：
Knotts, G.;Bhaumik, A.;Guha, S.
我们研究了溶剂在使用铁电共聚物聚偏氟乙烯-共三氟乙烯（PVDF-TrFe）作为栅极绝缘层的并五苯器件性能中的作用。高偶极矩溶剂，如二甲基亚砜（DMSO），用于溶解共聚物用于纺丝，增加了场效应晶体管中的电荷载流子迁移率比低偶极矩溶剂近一个数量级。研究了Al/PVDF-TrFe/Au金属-铁电-金属器件的极化特性。在使用DMSO作为铁电溶剂的样品中观察到类似20%的残余极化增加。基于DMSO的样品即使在最低的测量电压下，其位移曲线也表现出滞后，这表明共聚物中的偶极子最初更有序。(C) 2014 AIP出版有限责任公司
We examine the role of solvents in the performance of pentacene devices using the ferroelectric copolymer poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFe) as a gate insulating layer. High dipole moment solvents, such as dimethyl sulfoxide (DMSO), used to dissolve the copolymer for spincasting, increase the charge carrier mobility in field-effect transistors by nearly an order of magnitude as compared to lower dipole moment solvents. The polarization in Al/PVDF-TrFe/Au metal-ferroelectric-metal devices is also investigated. An increase in remnant polarization of similar to 20% is observed in the sample using DMSO as the ferroelectric solvent. The DMSO based sample shows a hysteresis in its displacement curve even at the lowest measured voltage, indicating that the dipoles in the copolymer are more ordered initially. (C) 2014 AIP Publishing LLC.