Liquid crystalline dithienothiophene derivatives for organic electronics
Liquid crystalline dithienothiophene derivatives for organic electronics
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DOI：
10.1016/j.orgel.2018.06.002
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发表时间：
2018-10
影响因子：
3.2
通讯作者：
Joachim Vollbrecht;P. Oechsle;Arne Stepen;F. Hoffmann;J. Paradies;T. Meyers;U. Hilleringmann;J. Schmidtke;H. Kitzerow
中科院分区：
文献类型：
--
作者：
Joachim Vollbrecht;P. Oechsle;Arne Stepen;F. Hoffmann;J. Paradies;T. Meyers;U. Hilleringmann;J. Schmidtke;H. Kitzerow
两个2,6-二（4-（烷基氧基）苯基）二噻吩[3,2-b:2 ',2 ' -d]的合成和中间相表征表明钯催化的碳-硫交叉偶联/5-内切环化序列的成功应用以及产物中向列相的出现。光谱和环伏安测量显示分子轨道能量与一个良好的标准空穴导体相当。因此，其中一种化合物成功地应用于电致发光样品中作为空穴导电层。在薄膜晶体管（TFT）中，两种化合物在饱和区的载流子迁移率分别为0.13 cm2V−1s−1和0.03 cm2V−1s−1。通过烷硫醇处理可以降低金属半导体界面的注入阻挡，从而在低v区实现线性ID（VD）特性，在饱和状态下最大电流达到ID，max= - 18 μA ，VG= - 2.5 V。实现了单型TFT技术的逆变电路。
The synthesis and mesophase characterization of two 2,6-bis(4-(alkyloxy)phenyl)dithieno [3,2-b:2′,2′-d]thiophenes indicate successful application of a palladium-catalyzed carbon-sulfur cross-coupling/5-endo-dig cyclization sequence and the appearance of a nematic mesophase in the resulting products. Spectroscopic and cyclovoltammetric measurements reveal molecular orbital energies that are comparable to a good standard hole conductor. Consequently, one of the compounds was successfully applied as a hole conducting layer in an electroluminescent sample. In thin-film transistors (TFT), the two compounds show charge carrier mobilities in the saturation region μsatof 0.13 cm2V−1s−1and 0.03 cm2V−1s−1, respectively. The injection barrier at the metal semiconductor interface could be reduced by alkanethiol treatment, thereby enabling a linear ID(VD) characteristics in the low VDregion and maximum currents up to ID,max= - 18 μA at VG= - 2.5 V in the saturation regime. Inverter circuits in single-type TFT technology were implemented.