TITLE:
Color-Tunable Hybrid White Organic Light-Emitting Diodes with Double Interlayers
AUTHORS:
Chunhong Gao, Ziyang Xiong, Fuxing Yu, Xingjuan Ma, Yue Zhang, Xin Zeng, Zuhong Xiong
KEYWORDS:
Hybrid White Organic Light-Emitting Diode, Color-Tunable, Singlet Exciton, Triplet Exciton, Phosphor
JOURNAL NAME:
Optics and Photonics Journal,
Vol.7 No.8B,
August
10,
2017
ABSTRACT:
An efficient color-tunable hybrid white organic light-emitting diode is demonstrated with double interlayers of 2,7-bis(carbazol-9-yl)-9,9-ditoylfluo- rene/2-(diphenylphosphoryl) spiroflu-orene (DMFL-CBP/SPPO1) inserted between blue fluorescent and yellow phosphorescent-emitting layers, and exhibits Commission Internationale de l’Eclairage (CIE1931) ranging from warm white (0.4368, 0.4497) to cool white (0.2781, 0.2896) with driving current density from 0.2 to 40 mA/cm2. The recombination of singlet and the triplet excitons in blue fluores-cent-emitting layer and yellow phosphorescent-emitting layer, respectively, can be modulated by both the thickness of these double interlayers and the applied current densities.