1. Blue Phosphorescent Organic Light-Emitting Diodes Using N-Type Semiconductor Extra Emission Layer.
- Author
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Yun, Geum J., Yoo, Seung I., Lee, Song E., Kim, Jin W., Kang, Jin S., Kim, Young K., and Kim, Woo Y.
- Subjects
ORGANIC light emitting diodes ,PHOSPHORS ,N-type semiconductors ,CRYSTAL structure ,SPECTRUM analysis - Abstract
Blue phosphorescent organic light-emitting diodes (PHOLEDs) are fabricated using n-type and bipolar extra emission layer with structure of ITO/TAPC (700 Å)/mCP:FIrpic-8% (250 Å)/mCP:x:FIrpic-8% (50 Å, x: CDBP, TPBi, TmPyPB)/TPBi (300 Å)/LiF (20 Å)/Al (1200 Å). The electrical and optical characteristics of blue PHOLEDs with different extra emission layer (EEL) material located between EML and ETL such as current density, luminous efficiency, efficiency roll-off, and EL spectra are observed and proven that the extra emission layer material trapped charge carrier. The blue PHOLED with TPBi EEL improved driving voltage, luminous efficiency, and efficiency roll-off compared to reference blue PHOLED without EEL. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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