Near-white organic electroluminescent material and its prepring method
An electroluminescent material and electroluminescent technology, applied in the directions of luminescent materials, electroluminescent light sources, electric light sources, etc., can solve the problems of difficulty of white light-emitting devices, shift of light-emitting wavelength, etc., achieve good carrier transport characteristics, and enhance luminescence. Good strength and uniformity
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Embodiment 1
[0023] Embodiment 1, the preparation of 4-(benzothiazole)-N-(4-(benzothiazole) phenyl)-N-phenylaniline: add 1.2g (4.0mmol) 4-dianilinobenzene in 50ml flask Formaldehyde, 0.9ml (8.4mmol) o-aminothiophenol and 10ml DMSO, placed the reaction bottle in a sand bath, heated to 195°C and refluxed for 2 hours. The reaction solution was cooled to room temperature, poured into water, and filtered with suction to obtain a light brown solid. Purified by column chromatography (eluent: toluene) to obtain 1.7 g of a yellow-white solid (83% yield).
[0024] IR (KBr, cm -1 ): 2364, 1591, 1560, 1510, 1457, 835, 760, 725, 695.
[0025] 1 H-NMR (CDCl 3 , 500MHz): 8.04(d, J=8.4 Hz, 2H), 7.99(d, J=8.8 Hz, 4H), 7.89(d, J=8.0 Hz, 2H), 7.48(t, J=7.9 Hz, 2H ), 7.38-7.35 (m, 4H), 7.23-7.17 (m, 7H).
[0026] Solid photoluminescence (thin film): peak wavelength 468nm, half maximum width 136nm.
[0027] Color coordinates: x=0.20, y=0.33.
[0028] MS (MALDI): m / e 511 (M).
[0029] Elemental Analysi...
Embodiment
[0030] Embodiment, preparation of near-white organic electroluminescence device: ITO conductive glass is put into 1.0X10 after cleaning -5 In a vacuum chamber of Pa, vapor-deposit 60nmNPB, 40nmBDS and 30nmTPBI in sequence, and then in another vacuum chamber (1.0X10 -4 pa) Evaporate 100nmAl to obtain a device with a structure of ITO / NPB / BDS / TPBI / Al. The device is not packaged and measured in a nitrogen atmosphere. The light-up voltage is 6.0V (1cd / m 2 ), the maximum brightness is 3610cd / m 2 , the maximum current efficiency is 5.50cd / A, the maximum power efficiency is 1.66lm / W, and the maximum external quantum efficiency is 3.03%.
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