Organic material and application thereof in organic electroluminescent devices
A technology of organic light-emitting devices and organic materials, applied in the direction of electric solid-state devices, electrical components, luminescent materials, etc., can solve the problems of impure luminous color and chromaticity, low luminous efficiency, low carrier transport capacity, etc., and achieve good Effect of Luminous Efficiency and Power Efficiency
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Embodiment 1
[0031] Embodiment 1: the synthesis of compound (10)
[0032] a) Synthesis of 2-methyl-9,10-diphenylanthracene
[0033] A 250 ml three-necked flask was protected by nitrogen, and 50 ml of dry tetrahydrofuran and 4.71 g of bromobenzene (0.03Mol) were added thereto, cooled to -78°C with an acetone dry ice bath, and 10Ml of 2.5Mol / L normal The n-hexane solution of butyllithium, after dropping the n-butyllithium, keep the reaction solution at -78°C for 1 hour, add 2.22 grams of 2-methylanthraquinone (0.01Mol) to it, and then slowly raise the temperature to 25°C for 4 hours . Poured into 100 ml of 5% glacial acetic acid aqueous solution, a yellow solid was precipitated, filtered with suction and washed with water. Add the obtained yellow solid to a 250 ml three-necked flask, add 60 ml of glacial acetic acid, 9 g of sodium hypophosphite monohydrate (0.085Mol), and 9 g of potassium iodide (0.054Mol), stir and heat to reflux for 2 hours, then add 100 ml of water, filtered, washed wi...
Embodiment 2
[0038] Embodiment 2: the synthesis of compound (13)
[0039] a) Synthesis of 2-methyl-9,10-bis(1-naphthyl)anthracene
[0040] The same as the synthesis of 2-methyl-9,10-diphenylanthracene, except that bromobenzene is replaced by 1-bromonaphthalene, the high performance liquid chromatography content of the product is 98.9%, and the yield is 80.1%. Mass spectrum m / e 444.
[0041] Synthesis of 2-bromomethyl-9,10-bis(1-naphthyl)anthracene
[0042] Synthesis with 2-bromomethyl-9,10-diphenylanthracene, just replace 2-methyl-9,10-diphenylanthracene with 2-methyl-9,10-bis(1-naphthyl) ) anthracene, the high performance liquid chromatography content of the product is 99.2%, and the yield is 78%. Mass spectrum m / e 522.
[0043] c) Synthesis of compound (13)
[0044] Synthetic with compound (10), just change 2-bromomethyl-9,10-diphenylanthracene into 2-bromomethyl-9,10-(1-naphthyl)anthracene, product HPLC content 99.6%, yield 60%. Mass spectrum m / e 886.
[0045] Examples of organi...
Embodiment 3
[0048] Example 3: Using compound (13) as a host material to dope blue dye DPAVBi to prepare a blue electroluminescent device. The device structure is ITO / NPB(40nm) / compound (13):DPAVBi(6%)(x nm) / AlQ3(20nm) / LiF(0.5nm) / Al(150nm).
[0049] On a glass substrate covered by indium oxide-tin oxide (ITO) that has been cleaned, the NPB of 40nm is evaporated continuously by the method for vacuum evaporation, the blue color of compound (13) and 6% (mass percentage) among the present invention Dye DPAVBi, then vapor-deposit 20nm thick AlQ3, then vapor-deposit 0.5nm LiF and 150nm Al as the cathode. Changing the thickness of the light-emitting layer to 40, 30, and 20nm, devices with three structures were prepared. When the thickness of the light-emitting layer was 30nm, the turn-on voltage was 5V, the maximum luminous efficiency could reach 7.5cd / A, and the maximum power efficiency was 3.8 lm / W, with good photoelectric performance. The specific indicators are shown in Table 1.
[0050] T...
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