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Thermally Stable and Highly Luminescent Green Emissive Fluorophores with Acenaphtho[1,2‐ k ]fluoranthene Cores and Aromatic Amine Groups
Author(s) -
Han Liang,
Ye Kaiqi,
Li Chenglong,
Zhang Yuewei,
Zhang Hongyu,
Wang Yue
Publication year - 2017
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201600458
Subject(s) - fluoranthene , chemistry , oled , photochemistry , luminescence , amine gas treating , homo/lumo , fluorescence , conjugated system , electroluminescence , molecular orbital , ambipolar diffusion , molecule , electron , optoelectronics , organic chemistry , materials science , physics , layer (electronics) , quantum mechanics , polymer , anthracene
Four acenaphtho[1,2‐ k ]fluoranthene‐cored fluorophores 1 – 4 attached by a variety of N‐containing electron‐donating groups have been designed and synthesized. The appending N‐containing moieties and the central acenaphtho[1,2‐ k ]fluoranthene core form twisted molecular configurations and lead to separated HOMO and LUMO frontier molecular orbitals. X‐ray crystallographic analysis demonstrates that the substituted aromatic amines separate the luminescent π‐conjugated cores in the solid state. These compounds display excellent thermal and amorphous stabilities, high solid‐state fluorescence quantum efficiencies, and ambipolar charge transporting properties, indicating that they are ideal candidates for fabricating non‐doped organic light‐emitting diodes (OLEDs). The device based on compound 4 exhibits the best electroluminescent performance with an external efficiency of 2.82 % and brightness of 45800 cd m −2 , demonstrating the potential applications of this compound for OLED displays and lighting.