External Quantum Efficiency Above 20% in Deep Blue Phosphorescent Organic Light‐Emitting Diodes | Zendy

Jeon Soon Ok | Zendy; Jang Sang Eok | Zendy; Son Hyo Suk | Zendy; Lee Jun Yeob | Zendy

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External Quantum Efficiency Above 20% in Deep Blue Phosphorescent Organic Light‐Emitting Diodes

Author(s) -

Jeon Soon Ok,

Jang Sang Eok,

Son Hyo Suk,

Lee Jun Yeob

Publication year - 2011

Publication title -

advanced materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 10.707

H-Index - 527

eISSN - 1521-4095

pISSN - 0935-9648

DOI - 10.1002/adma.201004372

Subject(s) - phosphorescence , quantum efficiency , materials science , oled , phosphorescent organic light emitting diode , optoelectronics , diode , exciton , quantum , deep blue , photochemistry , optics , nanotechnology , physics , chemistry , fluorescence , condensed matter physics , layer (electronics) , quantum mechanics

Highly efficient deep blue phosphorescent organic light‐emitting diodes (PHOLEDs) with external quantum efficiency above 20% are developed using a bipolar‐type high‐triplet‐energy host material and a high‐triplet‐energy exciton blocking material. Maximum quantum efficiency of 25.1% and low roll‐off (still 23.1% at 1000 cd m −2 ) are achieved in these deep blue PHOLEDs.

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