10202-45-6Relevant articles and documents
Triazine-dibenzofuran-based n-type host materials for high-efficiency and long-lifetime green phosphorescent organic light-emitting diodes
Kim, Dong Jun,Lee, Sunhee,Lee, Yong Hui,Jang, Hyungkeun,Ahn, Kwang-Hyun,Han, Won-Sik
, p. 12102 - 12110 (2021)
Effective host materials are required to improve the performance of phosphorescent organic light-emitting diodes (PhOLEDs). Herein, a series of triazine-dibenzofuran-based n-type host materials,DBT1-DBT4, was prepared by varying the substitution position of dibenzofuran. The photophysical, thermal, and electrochemical properties as well as the device performance of these materials were investigated to establish structure-property relationships. The results demonstrated that the substitution position of dibenzofuran significantly affects the chemical structure, resulting in differences in electrochemical and photophysical properties. All the developed materials were utilized in green top-emitting PhOLEDs as an n-type host material mixed with a p-type host (BPCz), and their electroluminescence (EL) properties were assessed by systematically analysing 18 devices. Among them, the green PhOLEDs using a mixed host ofDBT4/BPCz(DBP4-III) displayed the best EL performance with a high current efficiency up to 131.98 cd A?1, an external quantum efficiency up to 30.90%, and a power efficiency up to 105.44 lm W?1with a device lifetime (T95) of 180 h at 10?000 nits. These findings are expected to aid in the development of improved n-type host materials for highly efficient top-emitting PhOLEDs with long operational lifetimes.
PHOSPHORESCENT HOST COMPOSITION, ORGANIC OPTOELECTRONIC DIODE, AND DISPLAY DEVICE
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Paragraph 0189-0190, (2021/04/17)
Provided are a composition for a phosphorescent host including a first host represented by Chemical Formula 1, a second host represented by a combination of Chemical Formula 2 and Chemical Formula 3; and an organic optoelectronic device including an anode and a cathode facing each other and an organic layer disposed between the anode and the cathode, wherein the organic layer includes an auxiliary layer including at least one of a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer and a light emitting layer, and the light emitting layer includes a phosphorescent dopant having a maximum photoluminescence wavelength of 550 nm to 750 nm along with the composition, and a display device including the same. Details of Chemical Formulae 1 to 3 are the same as defined in the specification.
Organic compound, and organic electroluminescent device and electronic device using same
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Paragraph 0164-0169, (2021/02/20)
The invention relates to an organic compound. The structure of the organic compound comprises a formula I. When the organic compound provided by the invention is used for a light-emitting layer of anorganic electroluminescent device, the device efficiency of the device can be effectively improved, and the service life of the organic electroluminescent device is prolonged.