Liquid organic semiconductor material

Abstract

An organic material having at least one aromatic conjugated π-electron system is selected. The purity of the organic material is improved by purification, and a conduction mechanism of the organic material is confirmed by a time-of-flight method, whereby a liquid phase of the organic material is usable as an organic semiconductor. A method that enables the usage of a liquid phase of an organic material as an organic semiconductor is provided. The method involves confirming the electronic conduction of the organic material having at least one aromatic conjugated π-electron system by evaluation of a charge transport property using a time-of-flight method, and by evaluation of a dilution effect caused by addition of a diluent.

1 . An organic semiconductor material comprising an organic material having at least one aromatic conjugated π-electron system,
 wherein, the organic semiconductor material shows an isotropic phase, exhibits electron and/or hole conduction and has a fluidity in an operable temperature range of −20 to +120° C. 
 
     
     
         2 . The organic semiconductor material according to  claim 1 , wherein the isotropic phase is confirmed by observing a thin layer sample thereof with a polarized optical microscope in a cross-Nicole arrangement. 
     
     
         3 . The organic semiconductor material according to  claim 1 , which has an electron and/or hole mobility of 10 −7  cm 2 /Vs or more. 
     
     
         4 . The organic semiconductor material according to  claim 1 , which does not substantially have a shape-retaining property in the operable temperature range. 
     
     
         5 . The organic semiconductor material according to  claim 1 , which is in the form of a mixture. 
     
     
         6 . The organic semiconductor material according to  claim 5 , which is in the form of a solution.