Composite Material, Light-Emitting Element, Light-Emitting Device and Manufacturing Method Thereof

Abstract

It is an object of the present invention to provide a composite material that can be used for manufacturing a heat-resistant light-emitting element, provide a composite material that can be used for manufacturing a heat-resistant light-emitting element that can be driven with stability for a long period of time, and further, provide a composite material that can be used for manufacturing a light-emitting element that easily prevents short circuit between electrodes and uses less power. The present invention provides a composite material that has a first metal oxide skeleton including a first metal atom and an organic compound that is bound to the first metal atom by forming a chelate, where the first metal oxide exhibits an electron accepting property to the organic compound.

1 . A composite material comprising: 
 a metal oxide skeleton comprising a metal atom; and    an organic compound that is bound to the metal atom by forming a chelate,    wherein the metal oxide exhibits an electron accepting property to the organic compound.    
   
   
       2 . The composite material according to  claim 1 , wherein the organic compound is an organic compound having an arylamine skeleton.  
   
   
       3 . The composite material according to  claim 1 , wherein the metal atom is a transition metal.  
   
   
       4 . The composite material according to  claim 1 , wherein the metal atom is one or more of titanium, vanadium, molybdenum, tungsten, rhenium, ruthenium, and niobium.  
   
   
       5 . The composite material according to  claim 1 , further including a second metal oxide.  
   
   
       6 . The composite material according to  claim 1 , further including silicon oxide.  
   
   
       7 . A light-emitting element comprising a light-emitting layer including a luminescent material and a layer including the composite material according to  claim 1  between a pair of electrodes.  
   
   
       8 . The light-emitting element according to  claim 7 , wherein the layer including the composite material is provided in contact with any one or both of the pair of electrodes.  
   
   
       9 . A light-emitting device comprising the light-emitting element according to  claim 7 .  
   
   
       10 . A composite material comprising: 
 a metal oxide skeleton comprising a metal atom; and    an organic compound that is bound to the metal atom by forming a chelate,    wherein the metal oxide exhibits an electron donating property to the organic compound.    
   
   
       11 . The composite material according to  claim 10 , wherein the organic compound is an organic compound having any one or more of a pyridine skeleton, a pyrazine skeleton, a triazine skeleton, an imidazole skeleton, a triazole skeleton, an oxadiazole skeleton, a thiadiazole skeleton, an oxazole skeleton, and a thiazole skeleton.  
   
   
       12 . The composite material according to  claim 10 , wherein the metal atom is one of an alkali metal and an alkali earth metal.  
   
   
       13 . The composite material according to  claim 10 , wherein the metal atom is one or more of lithium, calcium, and barium.  
   
   
       14 . The composite material according to  claim 10 , further including a second metal oxide.  
   
   
       15 . The composite material according to  claim 10 , further including aluminum oxide.  
   
   
       16 . The composite material according to  claim 10 , further including a third metal oxide.  
   
   
       17 . The composite material according to  claim 10 , further including silicon oxide.  
   
   
       18 . A light-emitting element comprising a light-emitting layer including a luminescent material and a layer including the composite material according to  claim 10  between a pair of electrodes.  
   
   
       19 . The light-emitting element according to  claim 18 , wherein the layer including the composite material is provided in contact with any one or both of the pair of electrodes.  
   
   
       20 . A light-emitting device comprising the light-emitting element according to  claim 18 .  
   
   
       21 . A composite material comprising: 
 a first metal oxide skeleton comprising a first metal atom;    an organic compound that is bound to the first metal atom by forming a chelate; and    a second metal oxide comprising a second metal atom    wherein the second metal oxide exhibits an electron accepting property to the organic compound.    
   
   
       22 . The composite material according to  claim 21 , wherein a valence of the first metal atom is trivalent or more and hexavalent or less.  
   
   
       23 . The composite material according to  claim 21 , wherein the first metal atom is a metal atom belonging to Group 13 or 14.  
   
   
       24 . The composite material according to  claim 21 , wherein the first metal atom is any one of aluminum, gallium, and indium.  
   
   
       25 . The composite material according to  claim 21 , wherein the organic compound is an organic compound having an arylamine skeleton.  
   
   
       26 . The composite material according to  claim 21 , wherein the second metal atom is a transition metal.  
   
   
       27 . The composite material according to  claim 21 , wherein the second metal atom is one or more of titanium, vanadium, molybdenum, tungsten, rhenium, ruthenium, and niobium.  
   
   
       28 . The composite material according to  claim 21 , further including a third metal oxide.  
   
   
       29 . The composite material according to  claim 21 , further including silicon oxide.  
   
   
       30 . A light-emitting element comprising a light-emitting layer including a luminescent material and a layer including the composite material according to  claim 21  between a pair of electrodes.  
   
   
       31 . The light-emitting element according to  claim 30 , wherein the layer including the composite material is provided in contact with any one or both of the pair of electrodes.  
   
   
       32 . A light-emitting device comprising the light-emitting element according to  claim 30 .  
   
   
       33 . A composite material comprising: 
 a first metal oxide skeleton comprising a first metal atom;    an organic compound that is bound to the first metal atom by forming a chelate; and    a second metal oxide comprising a second metal atom    wherein the second metal oxide exhibits an electron donating property to the organic compound.    
   
   
       34 . The composite material according to  claim 33 , wherein a valence of the first metal atom is trivalent or more and hexavalent or less.  
   
   
       35 . The composite material according to  claim 33 , wherein the first metal atom is a metal atom belonging to Group 13 or 14.  
   
   
       36 . The composite material according to  claim 33 , wherein the first metal atom is any one or more of aluminum, gallium, and indium.  
   
   
       37 . The composite material according to  claim 33 , wherein the organic compound is an organic compound having any one or more of a pyridine skeleton, a pyrazine skeleton, a triazine skeleton, an imidazole skeleton, a triazole skeleton, an oxadiazole skeleton, a thiadiazole skeleton, an oxazole skeleton, and a thiazole skeleton.  
   
   
       38 . The composite material according to  claim 33 , wherein the second metal atom is one of an alkali metal and an alkali earth metal.  
   
   
       39 . The composite material according to  claim 33 , wherein the second metal atom is one or more of lithium, calcium, and barium.  
   
   
       40 . The composite material according to  claim 33 , further including a third metal oxide.  
   
   
       41 . The composite material according to  claim 33 , further including silicon oxide.  
   
   
       42 . A light-emitting element comprising a light-emitting layer including a luminescent material and a layer including the composite material according to  claim 33  between a pair of electrodes.  
   
   
       43 . The light-emitting element according to  claim 42 , wherein the layer including the composite material is provided in contact with any one or both of the pair of electrodes.  
   
   
       44 . A light-emitting device comprising the light-emitting element according to  claim 42 .  
   
   
       45 . A composite material comprising: 
 a metal oxide skeleton comprising a metal atom; and    an organic compound that is bound to the metal atom by forming a chelate,    wherein the metal oxide functions as an electron acceptor.    
   
   
       46 . The composite material according to  claim 45 , wherein the organic compound is an organic compound having an arylamine skeleton.  
   
   
       47 . The composite material according to  claim 45 , wherein the metal atom is a transition metal.  
   
   
       48 . The composite material according to  claim 45 , wherein the metal atom is one or more of titanium, vanadium, molybdenum, tungsten, rhenium, ruthenium, and niobium.  
   
   
       49 . The composite material according to  claim 45 , further including a second metal belonging to Group 13 or 14.  
   
   
       50 . A light-emitting element comprising a light-emitting layer including a luminescent material and a layer including the composite material according to  claim 45  between a pair of electrodes.  
   
   
       51 . The light-emitting element according to  claim 50 , wherein the layer including the composite material is provided in contact with any one or both of the pair of electrodes.  
   
   
       52 . A light-emitting device comprising the light-emitting element according to  claim 50 .  
   
   
       53 . A composite material comprising: 
 a metal oxide skeleton comprising a metal atom; and    an organic compound that is bound to the metal atom by forming a chelate,    wherein the metal oxide functions as an electron donor.    
   
   
       54 . The composite material according to  claim 53 , wherein the organic compound is an organic compound having any one or more of a pyridine skeleton, a pyrazine skeleton, a triazine skeleton, an imidazole skeleton, a triazole skeleton, an oxadiazole skeleton, a thiadiazole skeleton, an oxazole skeleton, and a thiazole skeleton.  
   
   
       55 . The composite material according to  claim 53 , wherein the metal atom is one of an alkali metal and an alkali earth metal.  
   
   
       56 . The composite material according to  claim 53 , wherein the metal atom is one or more of lithium, calcium, and barium.  
   
   
       57 . The composite material according to  claim 53 , further including a second metal oxide.  
   
   
       58 . A light-emitting element comprising a light-emitting layer including a luminescent material and a layer including the composite material according to  claim 53  between a pair of electrodes.  
   
   
       59 . The light-emitting element according to  claim 58 , wherein the layer including the composite material is provided in contact with any one or both of the pair of electrodes.  
   
   
       60 . A light-emitting device comprising the light-emitting element according to  claim 58.