Organic Field-effect Transistors based on Disubstituted Perylene Diimides: Effect of Alkyl Chains on the Device Performance
作者:Alexander V. Mumyatov、Lidiya I. Leshanskaya、Denis V. Anokhin、Nadezhda N. Dremova、Pavel A. Troshin
DOI:10.1016/j.mencom.2014.09.020
日期:2014.9
The preparation and systematic investigation of n-type semiconductor materials based on disubstituted perylene diimides (PDIs) possessing alkyl chains with variable length (from C-4 to C-12) are reported. It was shown that electrical characteristics of field-effect transistors can be tuned by changing the length of the alkyl chains in the PDIs used as semiconductor materials.
Liquid Crystalline Perylene Diimides: Architecture and Charge Carrier Mobilities
作者:Corien W. Struijk、Alexander B. Sieval、Jarno E. J. Dakhorst、Marinus van Dijk、Peter Kimkes、Rob B. M. Koehorst、Harry Donker、Tjeerd J. Schaafsma、Stephen J. Picken、Anick M. van de Craats、John M. Warman、Han Zuilhof、Ernst J. R. Sudhölter
DOI:10.1021/ja000991g
日期:2000.11.1
The phase behavior of three N-alkyl-substituted perylene diimide derivatives is examined by differential scanning calorimetry and polarized optical microscopy. The occurrence of multiple phase transitions indicates several crystalline and several liquid crystalline phases. X-ray diffraction measurements show that the liquid crystalline phases display high structural ordering in all three dimensions: smectic layers are formed, and within these smectic layers an additional ordering in columns is observed. Molecular modeling confirms this result and substantiates smectic ordering with interdigitating alkyl chains that determine the distance between the smectic layers. The ordering in columns is favored by pi-pi interactions between the cofacially oriented perylene molecules and by the elliptic shape of the molecule. Finally, intermolecular dipole-dipole interactions between the carbonyl groups of the imide moieties cause the perylene molecules to orient on average with a slight rotation between neighboring molecules within a columnar stack. Following the determination of the electronic transition dipole moment, this orientation, which still involves substantial pi-pi interactions, could be confirmed by UV/vis spectroscopy of perylene aggregates. To gauge the potential of these materials as organic semiconductors, the charge carrier mobility of one of the perylene derivatives has been measured by pulse-radiolysis time-resolved microwave conductivity. A value in excess of 0.1 cm(2) V-1 s(-1) is found in the liquid crystalline phase, and a value in excess of 0.2 cm(2) V-1 s(-1) is found for the crystalline phase. These values are comparable with the highest values previously found for other discotic materials.
NAPHTHALENEHYDRAZAMIMIDES AND PERYLENEHYDRAZAMIMIDES
申请人:Ciba Specialty Chemicals Holding Inc.
公开号:EP1141140B1
公开(公告)日:2002-09-04
CONDUCTIVE POLYMER ELECTRODES, WIRING ELEMENTS, AND USE THEREOF IN HEALTH AND SPORTS MONITORING
申请人:University of Connecticut
公开号:US20180014780A1
公开(公告)日:2018-01-18
Disclosed herein are conductive polymer electrodes and wiring elements for use as the conductive element in health monitoring applications, and more specifically to conductive polymer fabric electrodes or conductive polymer fabric wiring elements for use as the conductive element in pads for health monitoring applications and other wearable monitoring systems.