| 摘要 |
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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