Highly Efficient White Organic Light-Emitting Diodes with Controllable Excitons Behavior by a Mixed Interlayer between Fluorescence Blue and Phosphorescence Yellow-Emitting Layers | Zendy

ChunHong Gao | Zendy; Xiaobo Shi | Zendy; DongYing Zhou | Zendy; Lei Zhang | Zendy; ZhaoKui Wang | Zendy; LiangSheng Liao | Zendy

Open Access

Highly Efficient White Organic Light-Emitting Diodes with Controllable Excitons Behavior by a Mixed Interlayer between Fluorescence Blue and Phosphorescence Yellow-Emitting Layers

Author(s) -

ChunHong Gao,

Xiaobo Shi,

DongYing Zhou,

Lei Zhang,

ZhaoKui Wang,

LiangSheng Liao

Publication year - 2013

Publication title -

international journal of photoenergy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.426

H-Index - 51

eISSN - 1687-529X

pISSN - 1110-662X

DOI - 10.1155/2013/831765

Subject(s) - phosphorescence , exciton , fluorescence , materials science , optoelectronics , diode , oled , singlet state , photochemistry , layer (electronics) , optics , chemistry , nanotechnology , atomic physics , physics , excited state , condensed matter physics

A highly efficient hybrid white organic light-emitting diode (HWOLED) has been demonstrated with a mixed interlayer between fluorescent blue and phosphorescent yellow-emitting layers. The device structure is simplified by using a controllable fluorescence-mixed interlayer-phosphorescence emission layer structure. The electroluminance (EL) performance can be modulated easily by adjusting the ratio of the hole-predominated material to the electron-predominated material in the interlayer. It is found that the HWOLED with a ratio of 3 : 2 exhibits a current efficiency of 34 cd/A and a power efficiency of 29 lm/W at 1000 cd/m2 with warm white Commission Internationale de l’Eclairage (CIE1931) coordinates of (0.4273, 0.4439). The improved efficiency and adaptive CIE coordinates are attributed to the controllable mixed interlayer with enhanced charge carrier transport, optimized excitons distribution, and improved harvestings of singlet and triplet excitons

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