| 초록 |
Developing new ways of generating near infrared (NIR) light is important for the next generation of their potential applicability in biomedicine, night vision, national security. In this work, the combination of thiophene-phenylquinoline based NIR red emitting heteroleptic Ir(III) complexes have been synthesized and used for solution-processed phosphorescent organic light-emitting diode applications (PhOLEDs). The thermal stabilities, photophysical properties, X-ray crystal structures, electrochemical behaviors and electroluminescence (EL) properties are stated, and the influence of electron donor-acceptor (D-A) interaction on optoelectronic properties are systematically investigated. An easy synthetic pathway followed for preparing (TPQ)2Ir(pic), (TPQ)2Ir(acac), (BTPQ)2Ir(pic), (BTPQ)2Ir(acac) complexes. The high performance solution-processed PhOLEDs consisted of different type of layers fabricated in the series of ITO/PEDOT:PSS (40 nm)/TCTA:TPBI:dopant (50 nm)/TPBI (50 nm)/LiF (1 nm)/Al (100 nm). (BTPQ)2Ir(acac) shows the external quantum efficiency (EQE) of 3.65% with CIE coordinated (0.703, 0.269) at 10 mA/cm2. |
