Novel adamantane-bridged phenanthroimidazole molecule for highly efficient full-color organic light-emitting diodes

Highly efficient deep blue phenanthroimidazole fluorescent material by incorporating an adamantane moiety (AD-BPI) is designed and synthesized. AD-BPI exhibits excellent photophysical properties including a deep blue emission, high triplet energy level and photoluminescence efficiency, fine morpholo...

Full description

Saved in:
Bibliographic Details
Published in:Dyes and pigments 2020-06, Vol.177, p.108273, Article 108273
Main Authors: Guan, Hui-Min, Hu, Yong-Xu, Xiao, Guo-Yong, He, Wen-Ze, Chi, Hai-Jun, Lv, Yan-Li, Li, Xiao, Zhang, Dong-Yu, Hu, Zhi-Zhi
Format: Article
Language:English
Subjects:
Adamantane
Deep blue
Host
OLEDs
Phenanthroimidazole
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Highly efficient deep blue phenanthroimidazole fluorescent material by incorporating an adamantane moiety (AD-BPI) is designed and synthesized. AD-BPI exhibits excellent photophysical properties including a deep blue emission, high triplet energy level and photoluminescence efficiency, fine morphological and thermal stability, and ambipolar nature. Non-doped deep blue organic light-emitting diodes (OLEDs) following the construction of ITO (Indium–Tin Oxide)/TAPC (Bis [4‐[N, N‐di (4‐tolyl) amino] phenyl]‐cyclohexane, 30 nm)/AD-BPI (100 nm)/TPBi (1, 3, 5-tris (2-N-phenylbenzimidazolyl) benzene, 50 nm)/Liq (8-hydroxyquinolatolithium, 2 nm)/Al (100 nm) utilizing AD-BPI as emissive layer achieve the peak external quantum efficiency (EQE) of 5.8% with the CIE coordinates of (0.15, 0.07). Using AD-BPI as universal host, the corresponding green, yellow and red phosphorescent devices are also fabricated and exhibit the maximum EQEs of 23.3%, 16.7% and 19.1% accompanying with negligible efficiency roll-off under ultrahigh luminance. These experimental performances are intensely competitive with the recently reported advanced results of full-color OLEDs. It is the first demonstration of adamantane-based phenanthroimidazole molecule featuring as both host and emitter. [Display omitted] •A novel adamantane-bridged phenanthroimidazole molecule AD-BPI is prepared.•AD-BPI exhibits high PLQY, thermostability and triplet energy level.•AD-BPI is employed as emitter to establish efficient deep blue non-doped device.•AD-BPI is also used as universal host to fabricate highly efficient PhOLEDs.•This is the first demonstration of adamantane-based phenanthroimidazole emitter & host.
ISSN:0143-7208
1873-3743
DOI:10.1016/j.dyepig.2020.108273