Electronic Devices

Introduction

There are many kinds of electronic devices, which are the basis of modern electronic technology. With the rapid pace of global informatization development, electronic devices have become important technical resources. Organic fluorides have good thermal and oxidative stability, which can be used in the manufacturing process of electronic devices to increase their service life. In addition, organic fluorides also have some interesting properties such as the inductive effect of fluorine atoms and F...H-C interactions, which can originate a typical π-stack arrangement therefore enhancing the charge carrier mobility. Therefore, organic fluorides are widely used as semiconducting materials, electron-transfer materials or their raw materials in many electronic devices, such as organic field-effect transistors (OFETs), organic light-emitting diodes (OLEDs), photovoltaics and sensors.

Applications Of Organic Fluorides In Electronic Devices

Polynuclear organic aromatic fluorides such as fluorinated anthracenes, fluorinated pentacenes and fluorinated perylenes were used as semiconducting materials mainly in OFETs owing to their relatively high charge carrier mobility and highly ordered structure in the solid state. For example, Suzuki et al. have designed perfluoropentacene (C₂₂F₁₄) as a potential n-type semiconductor for OFETs^[1]. The key steps in the synthesis of perfluoropentacene are two Friedel-Crafts acylation reactions of tetrafluorophthalic anhydride with hydroquinone and quinone derivatives. The substitution of oxygen atoms in the intermediate was performed with HF/SF₄ and followed by Zn reduction leading to the final product perfluoropentacene. The obtained perfluoropentacene has extremely high electron mobility, and OFETs made using it exhibit higher operating frequencies. In addition, a bilayer field effect transistor (FET) could be obtained by depositing pentacene over a layer of perfluoropentacene. A good electrical contact between the two layers allowed this device to work well.

Oligomers of organic fluorides are also used as electron-transport materials in OLEDs. For example, in 2002, Suzuki et al. designed and synthesized perfluoro-1,3,5-tris(p-quaterphenyl)benzene (PF-13Y) and perfluoro-1,3,5-tris(p-quinquephenyl)benzene (PF-16Y)^[2]. They are synthesized by the simple coupling of 1-bromo-2,3,5,6-tetrafluorobenzene and perfluoro-1,3,5-tris(4-bromophenyl)benzene and 4-bromononafluorobiphenyl. PF-13Y and PF-16Y are stable amorphous solids and soluble in THF and CHCl₃. And they showed higher glass transition temperatures compared with perfluoro-1,3,5-tris(p-terphenyl)benzene (PF-10Y). OLEDs were fabricated using these materials as the electron-transport layers.

Alfa Chemistry can provide various organic fluorides, which have broad development prospects in electronic devices. Organic fluorides have good thermal and oxidative stability and can be used as semiconducting materials, electron-transfer materials or their raw materials in electronic devices. We will offer the most suitable organic fluorides according to customer's detailed requirements. At the same time, we also offer product customization. Alfa Chemistry provides you with the most professional services and the most favorable prices to buy organic fluorides. Please don't hesitate to contact us.

References

1. Suzuki, T.; et al. Perfluoropentacene: High-performance p-n junctions and complementary circuits with pentacene. J. Am. Chem. Soc. 2004, 126(26): 8138-8140.
2. Suzuki, T.; et al. Perfluoro-1,3,5-tris(p-oligophenyl)benzenes: Amorphous electron-transport materials with high-glass-transition temperature and high electron mobility. J. Solid State Chem. 2002, 168(2): 470-473.