Title: Efficient red phosphorescent organic light emitting diodes with double emission layers
Abstract: We demonstrate efficient red phosphorescent organic light emitting diodes with a bipolar emission structure (D-EML) formed by two different layers doped with a red phosphorescent dye. Due to its self-balancing character, the recombination zone is shifted far from the emission/carrier-blocking-layer interfaces. This prevents the accumulation of carriers at the interfaces and reduces the triplet–triplet annihilation, resulting in an improved efficiency of the D-EML device compared with the standard single-EML architecture. However, a current efficiency of 8.4 cd A−1 at 10 mA cm−2 is achieved in the D-EML device compared with 3.7 cd A−1 in the single-EML device.
Publication Year: 2008
Publication Date: 2008-07-17
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 10
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