ORGANIC EL ELEMENT AND ITS METHOD OF DRIVING
PROBLEM TO BE SOLVED: To make an emission color change in accordance with the change of ambient temperature for displaying. SOLUTION: The organic EL element 1a has a layer structure consisting of organic luminescent layer 2 and negative electrode 4. The organic luminescent layer 2 is formed by posit...
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Main Author | |
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Format | Patent |
Language | English |
Published |
27.04.2001
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To make an emission color change in accordance with the change of ambient temperature for displaying. SOLUTION: The organic EL element 1a has a layer structure consisting of organic luminescent layer 2 and negative electrode 4. The organic luminescent layer 2 is formed by positive electrode 3 which is composed by ITO of transparent and conductive film deposited on the glass substrate 5 or the like, and hole conductive luminescent layer 2a which is composed by PVCz doped with 0.5-5 weight % of perylene forming the hole conductive layer, and electron conductive luminescent layer 2b which is composed by Alq3 doped with 5-30 weight % of DCM forming the electron conducting layer. The negative electrode 4, composed of metals with small work function such as Mg:Ag, Al:Li, LiF+Al and the like, is formed on the organic luminescent layer 2. The organic EL element changes its luminous color of organic luminescent layer 3 in accordance with the change of the ambient temperature, by constant current operation of 100 mA/cm2 with voltage applied between positive electrode 3 as plus and negative electrode 4. |
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Bibliography: | Application Number: JP19990292589 |