Two Host-Dopant Emitting Systems Realizing Four-Color Emission: A Simple and Effective Strategy for Highly Efficient Warm-White Organic Light-Emitting Diodes with High Color-Rendering Index at High Luminance.
A four-color warm-white organic light-emitting diode employing a simple adjacent two-emitting-layer structure as a blue host-orange dopant/green host-red dopant has been fabricated, which exhibited a stable high electroluminescent performance: an external quantum efficiency of 23.3% and a power efficiency of 63.2 lm W(-1) at an illumination-relevant luminance of 1000 cd m(-2) with a high color-rendering index (CRI) of 92 and maintained high levels of 21.6% and 48.8 lm W(-1) with a CRI value of 93 at the extremely high luminance of 5000 cd m(-2). To our knowledge, this should be the best result so far for a white-light organic light-emitting diode with CRI > 90, simultaneously exhibiting very high efficiencies based on a high luminance level for the solid-state lighting.
State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun 130012, P. R. China.
Xuming
X
Zhuang
State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun 130012, P. R. China.
Hao
H
Zhang
State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun 130012, P. R. China.
Kaiqi
K
Ye
State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun 130012, P. R. China.
Yu
Y
Liu
State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun 130012, P. R. China.
Yue
Y
Wang
four-color; high CRI; phosphorescent material; warm-white; white-light organic light-emitting diode (WOLED)