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Study of Sequential Dexter Energy Transfer in High Efficient Phosphorescent White Organic Light-Emitting Diodes with Single Emissive Layer
| Content Provider | Paperity |
|---|---|
| Author | Yoon, Ju-an You, Seung Il Cheah, Kok Wai Kim, Nam Ho Kim, Woo Young Kim, Jin Wook Zhu, Fu Rong |
| Abstract | In this study, we report our effort to realize high performance single emissive layer three color white phosphorescent organic light emitting diodes (PHOLEDs) through sequential Dexter energy transfer of blue, green and red dopants. The PHOLEDs had a structure of; ITO(1500 Å)/NPB(700 Å)/mCP:Firpic-x%:Ir(ppy)3-0.5%:Ir(piq)3-y%(300 Å)/TPBi(300 Å)/Liq(20 Å)/Al(1200 Å). The dopant concentrations of FIrpic, Ir(ppy)3 and Ir(piq)3 were adjusted and optimized to facilitate the preferred energy transfer processes attaining both the best luminous efficiency and CIE color coordinates. The presence of a deep trapping center for charge carriers in the emissive layer was confirmed by the observed red shift in electroluminescent spectra. White PHOLEDs, with phosphorescent dopant concentrations of FIrpic-8.0%:Ir(ppy)3-0.5%:Ir(piq)3-0.5% in the mCP host of the single emissive layer, had a maximum luminescence of 37,810 cd/m2 at 11 V and a luminous efficiency of 48.10 cd/A at 5 V with CIE color coordinates of (0.35, 0.41). |
| File Format | HTM / HTML |
| DOI | 10.1038/srep07009 |
| Journal | Scientific Reports |
| Volume Number | 4 |
| Language | English |
| Publisher | Nature Publishing Group |
| Publisher Date | 2014-11-12 |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
