Achieving non-doped deep-blue OLEDs by applying bipolar imidazole derivatives

Non-Doped Deep-Blue OLEDs Based on Carbazole-π-Imidazole Derivatives

“…Therefore, obtaining highly efficient fluorescent emitters in the blue spectrum range, especially with deep-blue emission, hold the key to the development of a full-color OLED display. Constructing bipolar molecules with donor-p-acceptor structures has been demonstrated as an effective method to afford highly efficient deep-blue emitting materials [ 7 , 8 , 9 ]. The electro-withdraw group facilitates obtaining a wide band-gap (Eg), resulting in deep-blue emitting.…”

Synthesis and luminescent properties of spiroacridine-imidazole derivatives

“…The unique electronic configuration of imidazole derivatives makes them suitable for constructing blue and deep-blue emitters in OLEDs. 32–40…”

“…The unique electronic configuration of imidazole derivatives makes them suitable for constructing blue and deep-blue emitters in OLEDs. [32][33][34][35][36][37][38][39][40] Based on the above considerations, herein, we designed and synthesized two new D-A type deep-blue emitters SAF-BI and SAF-PI with spiro[acridine-9,9 0 -fluorene] (ASF) as the electron donor and BI and PI units as the electron acceptors, in which the donor and acceptor were connected using a phenyl-linker. Owing to the twisted D-A type structures of SAF-BI and SAF-PI, the p electron delocalization from the donor segment to the acceptor segment in SAF-BI and SAF-PI molecules was prevented, resulting in the separation of their HOMO and LUMO energy levels and achieving relatively small DE ST values.…”

Green synthesis of ethyl cinnamates under microwave irradiation: photophysical properties, cytotoxicity, and cell bioimaging

“… 31 In some cases, the deep-blue fluorophores exhibit multifunctional properties, 32 such as an efficient reduction of energy consumption, 33 an increase in color gamut and the ability of being the host of other large-wavelength fluorophores. 34 …”