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Efficient and Stable White Organic Light‐Emitting Diodes Employing a Single Emitter
Author(s) -
Li Guijie,
Fleetham Tyler,
Li Jian
Publication year - 2014
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.201305507
Subject(s) - common emitter , oled , materials science , rendering (computer graphics) , optoelectronics , luminance , diode , white paper , color rendering index , white light , quantum efficiency , computer science , engineering physics , optics , nanotechnology , computer graphics (images) , physics , archaeology , layer (electronics) , history
Using a single tetradentate platinum emitter dubbed Pt7O7, efficient and stable white organic light‐emitting diodes are developed. The excimer‐based white devices achieve an external quantum efficiency (EQE) of 24.5%, coordinates of (0.37, 0.42) based on the Commission internationale de l'éclairage (CIE) system, and a color rendering index (CRI) of 70. Moreover, devices of Pt7O7 in a stable structure demonstrate operational lifetimes (50% initial luminance) of 36 h at an elevated driving current of 20 mA cm 2 , which corresponds to over 10 000 h at 100 cd m 2 .
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