Thermal delayed fluorescent compound and application thereof
A fluorescent compound and thermal delay technology, applied in photovoltaic power generation, luminescent materials, organic chemistry, etc., can solve the problems of reducing the optical radiation transition rate of TADF materials, reducing material properties, and limited material types, achieving high optical radiation transition rate, improving The effect of crossing probability and improving luminous efficiency
Inactive Publication Date: 2018-11-27
AAC TECH NANJING
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Problems solved by technology
[0006] However, the applicant found that such materials and OLED devices based on the TADF effect still have many deficiencies, such as the types of materials are relatively limited, and the stability of the devices needs to be improved.
For example, in order to achieve the goal of ΔEST (singlet state and triplet state energy level difference) <0.3eV, many TADF materials need to completely separate the HOMO-LUMO orbitals in the design, which leads to the reduction of the optical radiation transition rate of the TADF material and reduces the material performance
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[0029] In order to make the purpose, technical solutions and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below. However, those of ordinary skill in the art can understand that in each implementation manner of the present invention, many technical details are proposed in order to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed by each claim of the present invention can also be realized.
[0030] compound
[0031] A specific embodiment of the present invention provides a thermally delayed fluorescence compound, which has a structure represented by general formula (I) or (II):
[0032]
[0033] Among them, X 1 、X 2 each independently O or S; R 1 , R 2 Each is independently a hydrogen atom, a deuterium atom, a halogen, a substituted or unsub...
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The invention relates to technical field of organic electroluminescence devices and discloses a thermal delayed fluorescent compound and application thereof in devices. The disclosed organic luminousmaterial has a structure shown as a formula (1). The compound has a high optical radiation transition rate, facilitates improvement of the luminous efficiency of materials and is particularly suitablefor serving as a luminous layer material applied to OLED, OFT, OPV, QLED and other technical fields.
Description
technical field [0001] The invention relates to the technical field of organic electroluminescent devices, in particular to a thermally delayed fluorescent compound and its application in devices. Background technique [0002] Since 1987, C.W.Tang et al. of Kodak reported for the first time that Alq was prepared by vacuum thermal evaporation method. 3 Since the double-layer device structure of light-emitting materials, organic electroluminescent materials have received great attention. For example, Samsung's Galaxy series mobile phones and S6 are all OLED mobile phones. In 2017, Apple has also adopted OLED display configurations on its mobile phones. [0003] Organic electroluminescence can be divided into fluorescence and phosphorescence electroluminescence. According to the spin quantum statistical theory, the formation probability ratio of singlet excitons and triplet excitons is 1:3, that is, singlet excitons only account for 25% of the "electron-hole pairs". Therefo...
Claims
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IPC IPC(8): C07D495/04C07D493/04C09K11/06H01L51/50H01L51/54
CPCC09K11/06C07D493/04C07D495/04C09K2211/1029C09K2211/1037C09K2211/1033C09K2211/1092C09K2211/1088C09K2211/1007H10K85/6576H10K85/6574H10K85/6572H10K50/11Y02E10/549
Inventor 谢再锋
Owner AAC TECH NANJING