Organic light-emitting diode with doped layers
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United States of America Patent
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Nov 15, 2016
Grant Date -
Jul 3, 2008
app pub date -
Feb 21, 2006
filing date -
Feb 22, 2005
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Abstract
The invention concerns an organic light-emitting diode comprising a lower electrode (2) and an upper electrode (8), an electroluminescent organic layer (5), and at least one doped organic layer (3; 7) in contact with one of said electrodes. The invention is characterized in that the doping is carried out using an alkaline-earth element or lanthanide, and the diode is heat-treated at temperature preferably not less than 60° C. for more than one hour. The invention enables the lighting performance of the diode to be considerably improved.
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