854952-58-2Relevant articles and documents
Three new carbazole derivatives with high thermal stability as host for efficient green phosphorescent organic-light emitting diodes
Ji, Jun,Li, Pengfei,Tian, Qifeng,Feng, Weiliang,Wu, Changjiang
, (2019)
Three host materials, DCzPh, DCzPy and DCzPm, were developed for phosphorescent organic light emitting devices (PhOLEDs). These three compounds exhibit high triplet energy level (ET > 2.7 eV), suitable glass transition temperatures (Tg > 130 °C), appropriate highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels, and balanced charge-transporting properties. Green PhOLEDs were fabricated by utilizing these three materials as hosts and the efficiencies were satisfactory. Device G3 based on DCzPm exhibited high efficiency with the maximum external quantum efficiency (EQE) of 17.2%, and even at the brightness of 1000 cd m?2, the EQE reached 17.1%, demonstrating its low efficiency roll-off. The above results indicate that these host materials possess great commercial potential in OLED applications.
Amine-based compound and organic light emitting diode comprising the same
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, (2021/03/16)
Disclosed are an amine-based compound and an organic light emitting device including the same. The amine-based compound is represented by chemical formula 1A.
Organic compound based on carbazole derivative structure and application of organic compound in OLED
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Paragraph 0069; 0071-0074, (2021/02/10)
The invention discloses an organic compound based on a carbazole derivative structure and an application of the organic compound in an OLED device. The structure of the compound simultaneously contains heteroaryl and a carbazole derivative structure, and has high glass transition temperature and molecular thermal stability. The evaporation temperature of the material is low, and the decompositiontemperature of the material is higher than the evaporation temperature of the material. The material has a low extinction coefficient and a high refractive index in the field of visible light, and caneffectively improve the light extraction efficiency of an OLED device after being applied to the OLED device as a covering layer, thereby improving the light emitting efficiency of the device and reducing the power consumption of the device.