Electronic element

Abstract

The object is to fabricate a novel organic semiconductor element which can effectively utilize the main-chain conduction of a conjugated high molecular compound having semiconductor-like properties. Provided is an electronic element which contains, as components, a pair of electrodes which is formed on a substrate, a mesoporous film in which tubular mesopores, which are orientation controlled in one direction, are formed, the mesoporous film being formed between the electrodes so as to be in contact with the electrodes, a conjugated high molecular compound held in the tubular mesopores, and a third electrode which is electrically insulated from the conjugated high molecular compound and is in contact with the mesoporous film.

1 . An electronic element, comprising: 
 a pair of electrodes formed on a substrate;    a mesoporous film having tubular mesopores oriented in one direction, the mesoporous film being formed between the pair of electrodes so as to be in contact with the pair of electrodes;    a conjugated high molecular compound held in the tubular mesopores; and    a third electrode which is electrically insulated from the conjugated high molecular compound and formed so as to be in contact with the mesoporous film.    
   
   
       2 . The electronic element according to  claim 1 , wherein the orientation direction of the tubular mesopores is parallel to the direction of an electric field when an electrical potential is applied across the pair of electrodes.  
   
   
       3 . The electronic element according to  claim 1 , wherein the electronic element is a field-effect transistor which controls the amount of a current flowing across the pair of electrodes by an electrical potential applied to the third electrode.  
   
   
       4 . The electronic element according to  claim 3 , wherein a material for the mesoporous film is silica.  
   
   
       5 . The electronic element according to  claim 3 , wherein a material for the mesoporous film is a hybrid material of silica and an organic substance.  
   
   
       6 . The electronic element according to  claim 1 , wherein a material for the mesoporous film contains a silicon oxide.  
   
   
       7 . The electronic element according to  claim 1 , wherein at least a portion of the substrate is a substrate having electrical conductivity and the substrate serves also as the third electrode.  
   
   
       8 . A method of manufacturing the electronic element according to  claim 1 , wherein a step of forming a conjugated high molecular compound in tubular mesopores which are orientation controlled comprises: 
 a step of forming a mesoporous film which is made up so as to contain tubular molecular assemblies of a surfactant having a uniform diameter, which are oriented in one direction;    a step of removing the surfactant from the pores of the mesoporous film;    a step of performing treatment so that pore surfaces of the mesoporous film after removal of the surfactant obtain hydrophobicity; and    a step of introducing the conjugated high molecular compound subsequently to the hydrophobicizing treatment.    
   
   
       9 . A method of manufacturing the electronic element according to  claim 1 , wherein a step of forming a conjugated high molecular compound in tubular mesopores which are orientation controlled comprises: 
 a step of forming a mesoporous film which is made up so as to contain tubular molecular assemblies of a surfactant having a uniform diameter, which are aligned in one direction, by use of a surfactant having a functional group capable of forming a conjugated high molecular compound by polymerization; and    a step of forming a conjugated high molecular compound by causing a surfactant in the mesoporous film to polymerize.    
   
   
       10 . A method of manufacturing an electronic element, comprising: 
 a step of forming a mesoporous film having tubular mesopores, which are orientation controlled in one direction, on a substrate;    a step of forming a conjugated high molecular compound in the orientation controlled tubular mesopores;    a step of forming a pair of electrodes for forming an electric field parallel to the direction of the pores so as to be in contact with the mesoporous film having tubular mesopores in which a conjugated high molecular compound is formed; and    a step of forming a third electrode which is electrically insulated from the conjugated high molecular compound and is in contact with the mesoporous film.    
   
   
       11 . A method of manufacturing an electronic element, comprising: 
 a step of preparing a substrate which has an electrically conductive part in at least a portion of a surface thereof;    a step of forming a mesoporous film having tubular mesopores, which are orientation controlled in one direction, on the electrically conductive part of the substrate;    a step of forming a conjugated high molecular compound in the tubular mesopores, which are orientation controlled; and    a step of forming a pair of electrodes for forming an electric field parallel to the direction of the pores so as to be in contact with the mesoporous film having tubular mesopores in which a conjugated high molecular compound is formed.