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A technology for display panels and compounds, applied in the field of compounds with TADF properties
Inactive Publication Date: 2020-01-10
SHANGHAI TIANMA AM OLED
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Abstract
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Problems solved by technology
However, there are few TADF materials that have been discovered so far,
Method used
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Embodiment 1
[0068] Synthesis of Compound P1
[0069]
[0070] Dissolve S2 (1mmol) and S18 (2mmol) in toluene solvent under nitrogen protection, add Pd(PPh 3 ) 4 , Refluxed at 120°C for 6h. After the reaction was completed, it was cooled to room temperature and the crude product was collected. The crude product was purified by silica gel chromatography using a mixed solvent of n-hexane:chloroform (5:1) as the eluent, and finally purified to obtain solid P1 (0.88 mmol, 88%).
[0071] MALDI-TOF MS: C 48 h 30 B 2 N 2 o 2 , m / z calculated: 688.39; measured: 688.25.
[0072] Elemental analysis results: C, 83.75; H, 4.39; B, 3.14; N, 4.07; O, 4.65; Measured values: C, 83.65;
Embodiment 2
[0074] Synthesis of Compound P2
[0075]
[0076] Dissolve S1 (1mmol) in o-dichlorobenzene solvent under nitrogen protection, add PPh 3 , heated to reflux, and reacted for 8h. After the reaction was completed, it was cooled to room temperature, all the solvent was distilled off under reduced pressure, and the crude product was collected. The crude product was purified by silica gel chromatography using a mixed solvent of n-hexane:chloroform (5:1) as the eluent, and finally purified to obtain solid S2 (0.92 mmol, 92%).
[0077] MALDI-TOF MS: C 12 h 8 N 2 , m / z calculated: 180.21; measured: 180.07.
[0078]
[0079] Dissolve S2 (1mmol) and S3 (2mmol) in toluene solvent under nitrogen protection, add Pd(PPh 3 ) 4 , Refluxed at 120°C for 6h. After the reaction was completed, it was cooled to room temperature and the crude product was collected. The crude product was purified by silica gel column chromatography, using a mixed solvent of n-hexane:chloroform (5:1) as e...
Embodiment 3
[0083] Synthesis of Compound P4
[0084]
[0085] Dissolve S2 (1mmol) and S19 (2mmol) in toluene solvent under nitrogen protection, add Pd(PPh 3 ) 4 , Refluxed at 120°C for 6h. After the reaction was completed, it was cooled to room temperature and the crude product was collected. The crude product was purified by silica gel column chromatography, using a mixed solvent of n-hexane:chloroform (5:1) as eluent, and finally purified to obtain solid P4 (0.88mmol, 88%).
[0086] MALDI-TOF MS: C 48 h 28 N 2 o 4 S 2 , m / z calculated: 760.88; measured: 760.15.
[0087] Elemental analysis results: C, 75.77; H, 3.71; N, 3.68; O, 8.41; S, 8.43; measured values: C, 75.67;
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Abstract
The invention relates to the technical field of OLEDs and provides a compound with TADF properties, a display panel comprising the compound and a display device comprising the compound. The compound has a structure shown as formula (1), wherein A1 and A2 are used for representing hydrogen atoms, phosphorus-containing oxygen substituent groups, sulfone substituent groups, aryl boron substituent groups and other electron acceptor groups; L1 and L2 are each independently selected from single bond, phenylene group, thienyl group, naphthylene group, anthranylene group, phenanthrylene group, and pyrenylene group; Ar1 and Ar2 are independently selected from hydrogen atoms, phenyl groups, thienyl groups, naphthyl groups, anthryl groups, phenanthrene groups, pyrenyl groups, phosphorus-containing oxygen group substituent groups, sulfone substituent groups, aryl boron substituent groups and other groups. A fused carbazole structure of the compound has very strong electron donating ability and thermal stability. When the fused carbazole structure is used as an electron donor to be combined with an appropriate acceptor material to form a bipolar main body material to be applied to light-emitting layers, good energy transfer can be realized between the bipolar main body material and a dopant, so that the light-emitting efficiency of devices is improved.
Description
technical field [0001] The invention relates to the technical field of organic electroluminescent materials, in particular to a compound with TADF properties, a display panel and a display device comprising the compound. Background technique [0002] With the development of electronic display technology, organic light-emitting devices (OLEDs) are widely used in various display devices, and the research and application of OLED light-emitting materials are also increasing. [0003] According to the light-emitting mechanism, the materials used for the OLED light-emitting layer mainly include the following four types: [0004] (1) fluorescent material; (2) phosphorescent material; (3) triplet-triplet annihilation (TTA) material 0; (4) thermally activated delayed fluorescence (TADF) material. [0005] For fluorescent materials, according to spin statistics, the ratio of singlet and triplet excitons in excitons is 1:3, so the maximum internal quantum yield of fluorescent material...
Claims
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Application Information
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