Electroluminescence element and a light emitting device using the same
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Abstract
An EL element which is thicker and lower-voltage drive without doping acceptor or donor than the conventional one. An EL element in which an electroluminescent film 103 containing an organic compound which can provide electroluminescent, a floating electrode 104, an electron transport supporting layer 105 and a cathode 102 are in order laminated on an anode 101. A film thickness of the electroluminescent film 103 is on the order of a conventional film thickness (on the order of approximately 100 nm), and the electron transport supporting layer 105 may also have a film thickness on the order of the electroluminescent film 103. The EL element can be driven at lower voltage than the conventional one by introducing a hole blocking material into an electron transport supporting layer.
60 Citations
116 Claims
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1-72. -72. (canceled)
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73. A display device comprising:
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an electroluminescence element over a substrate, the electroluminescence element comprising;
an anode;
an electroluminescent film containing an organic compound capable of generating electroluminescence, over the anode;
an electron transport layer over the electroluminescent film;
a floating electrode over the electron transport layer;
an electron transport supporting layer over the floating electrode; and
a cathode over the electron transport supporting layer, wherein the floating electrode comprises an insulating film formed in contact with the electron transporting layer and a conductive film formed in contact with the electron transport supporting layer. - View Dependent Claims (74, 75, 76, 77, 78, 79, 80, 81, 82)
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83. A display device comprising:
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an electroluminescence element over a substrate, the electroluminescence element comprising;
a cathode;
an electron transport supporting layer over the cathode;
a floating electrode over the electron transport supporting layer;
an electron transporting layer over the floating electrode;
an electroluminescent film containing an organic compound that generates electroluminescence, over the electron transporting layer; and
an anode over the electroluminescent film, wherein the floating electrode comprises an insulating film formed in contact with the electron transporting layer and a conductive film formed in contact with the electron transport supporting layer. - View Dependent Claims (84, 85, 86, 87, 88, 89, 90, 91, 92)
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93. An electric appliance comprising:
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a display device comprising an electroluminescence element over a substrate, the electroluminescence element comprising;
an anode;
an electroluminescent film containing an organic compound capable of generating electroluminescence, over the anode;
an electron transport layer over the electroluminescent film;
a floating electrode over the electron transport layer;
an electron transport supporting layer over the floating electrode; and
a cathode over the electron transport supporting layer, wherein the floating electrode comprises an insulating film formed in contact with the electron transporting layer and a conductive film formed in contact with the electron transport supporting layer. - View Dependent Claims (94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104)
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105. An electric appliance comprising:
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a display device comprising an electroluminescence element over a substrate, the electroluminescence element comprising;
an electroluminescence element over a substrate, the electroluminescence element comprising;
a cathode;
an electron transport supporting layer over the cathode;
a floating electrode over the electron transport supporting layer;
an electron transporting layer over the floating electrode;
an electroluminescent film containing an organic compound that generates electroluminescence, over the electron transporting layer; and
an anode over the electroluminescent film, wherein the floating electrode comprises an insulating film formed in contact with the electron transporting layer and a conductive film formed in contact with the electron transport supporting layer. - View Dependent Claims (106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116)
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Specification