Influence of Tetraphenylbenzene on the OFET Behavior of Triarylamines,Advanced Electronic Materials

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Influence of Tetraphenylbenzene on the OFET Behavior of Triarylamines
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2022-08-15 , DOI: 10.1002/aelm.202200484
Panneerselvam Devibala ₁ , Predhanekar Mohamed Imran ₂ , Nattamai S.P. Bhuvanesh ₃ , Samuthira Nagarajan ₁

Affiliation

A series of new tetraphenylbenzene-based triarylamines are successfully synthesized by employing the Diels–Alder cycloaddition reaction. The molecules exhibited good solubility in common organic solvents and thermal stability up to 500 °C. Molecular geometry and charge distribution of the molecules are envisioned by density functional theory. The high-lying highest occupied molecular orbital (HOMO) level (-5 eV) of compounds enables the p-channel conductivity. The influence of tetraphenylbenzene units on charge-delocalization of HOMO, crystalline packing, and organic field-effect transistor (OFET) characteristics is analyzed. OFETs are fabricated under ambient conditions by solution-processable method, and the devices displayed promising performance with charge carrier mobility µ_h up to 0.72 cm² V⁻¹ s⁻¹, on/off ratio of 10⁷, and lowest V_T of −2 V.

中文翻译：

四苯苯对三芳胺 OFET 行为的影响

采用 Diels-Alder 环加成反应成功合成了一系列新型四苯基苯基三芳基胺。这些分子在常见的有机溶剂中表现出良好的溶解性，并且在高达 500°C 的温度下表现出热稳定性。分子的分子几何形状和电荷分布由密度泛函理论设想。化合物的高位最高占据分子轨道 (HOMO) 能级 (-5 eV) 能够实现p沟道电导率。分析了四苯基苯单元对HOMO电荷离域、晶体堆积和有机场效应晶体管（OFET）特性的影响。OFET 是在环境条件下通过溶液可加工方法制造的，该器件显示出良好的性能，电荷载流子迁移率µ _h高达0.72 cm ² V ^-1 s ^-1，开/关比为10 ⁷，最低V _T为-2 V。

更新日期：2022-08-15

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