| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1440765 | Synthetic Metals | 2015 | 6 Pages |
•A new donor–acceptor type green fluorescent emitter, PhBBPP, was synthesized.•Thermal, photophysical, and electrochemical properties of PhBBPP were investigated.•PhBBPP showed high thermal stability and efficient intramolecular charge transfer.•A high luminous efficiency of 12.1 cd/A was achieved in non-doped OLED.
We synthesized a new donor–acceptor type (D–A type) green fluorescent emitter, 3,7-bis(1-(biphenyl-4-yl)-1H-benzo[d]imidazole-2-yl)-10-phenyl-10H-phenothiazine (PhBBPP), which consists of phenylphenothiazine as an electron donor and biphenylbenzimidazole as an acceptor. Its thermal and photophysical properties, and energy band structure were studied, and also organic light-emitting diodes (OLEDs) with various device structures were fabricated using PhBBPP as an emitting layer. The optimized OLED device with a structure of [ITO/NPB (40 nm)/PhBBPP (30 nm)/TPBi (30 nm)/Alq3 (10 nm)/LiF (1 nm)/Al (100 nm)] showed a turn-on voltage of 3.4 V, a luminous efficiency of 12.1 cd/A, and an external quantum efficiency of 4.0% at 100 cd/m2 with a maximum luminance of 8200 cd/m2.
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