CN102924431B - Organic luminescent compound containing acridine core and application thereof in electroluminescent device - Google Patents

Organic luminescent compound containing acridine core and application thereof in electroluminescent device Download PDF

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CN102924431B
CN102924431B CN201210428120.2A CN201210428120A CN102924431B CN 102924431 B CN102924431 B CN 102924431B CN 201210428120 A CN201210428120 A CN 201210428120A CN 102924431 B CN102924431 B CN 102924431B
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王悦
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Jilin Yuanhe Electronic Material Co.,Ltd.
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Abstract

The invention belongs to the technical field of organic electroluminescence, and particularly relates to an organic luminescent compound containing an acridine core and application thereof in an electroluminescent device. The structural formula of the compound is shown in the specification; the compound can be used as a luminescent layer for the preparation of an electroluminescent device, thus obtaining a high-performance electroluminescent device of which the emission spectrum is in a green light region; and the electroluminescent device can be used in the application fields such as illuminating light sources, signal lamps, alphanumeric displays, indicators, photoelectric couplers, flat-panel displays and the like.

Description

Containing the organic light emission compound of acridine core and the application in electroluminescent device
Technical field
The invention belongs to technical field of organic electroluminescence, be specifically related to organic light emission compound and the application of these compounds in electroluminescent device containing acridine core.
Background technology
Organic Light Emitting Diode is OLED(Organic Light Emitting Diode) due to self intrinsic advantage, as high in luminous, brightness, wide viewing angle, response are fast, less energy-consumption, can make flexible display apparatus etc., are considered to the technique of display of future generation that replaces liquid crystal technology desirable.In recent years, the exploitation of luminous organic material becomes a study hotspot in materials chemistry field.Organic electroluminescent technology is hopeful to realize the panchromatic flat-panel monitor of big area at low power consuming, low-work voltage, wide visual angle.
In fact, about organic electroluminescent phenomenon.The people such as Pope have reported organic electroluminescent phenomenon the earliest in earlier 1960s, and they have observed the blue light that anthracene sends while applying the high pressure of four hectovolts in anthracene single crystal both sides.But because monocrystalline is difficult to growth, device drive voltage very high (400~2000V), the technique that they adopt does not almost have practical use.Until 1987, the people such as C.W.Tang of U.S. Kodak company adopt ultrathin membrane technology to using the good aromatic amine of hole transport effect as hole transmission layer, using the aluminum complex of oxine as luminescent layer, using tin indium oxide (ITO) film and metal alloy respectively as anode and negative electrode, prepared luminescent device.This device has obtained brightness up to 1000cd/m under 10V driving voltage 2green emission, the efficiency of device is that 1.5lm/W(is shown in C.W.Tang and S.A.VanSlyke, Appl.Phys.Lett., 1987,51,913).This breakthrough makes organic electroluminescent research be able to worldwide in depth carry out rapidly.
OLED technology is used for showing several large advantages: low cost of manufacture, and active illuminating, flexibility, frivolous, response speed microsecond magnitude, high-level efficiency.Because OLED is the technology based on organic film, so it must have the advantage of thickness, quality, flexibility, considers that OLED thickness only has 100nm left and right, and therefore thickness and the quality-base of whole indicating meter originally derive from substrate.Use in addition organic materials also to bring an advantage, be exactly time of response fast, this depends on that the radiative transition life-span of OLED material generally only has several nanoseconds to 500ns left and right, and this is most suitable for displaying video, especially playing back at high speed picture, this is that liquid-crystal display is beyond one's reach.OLED technology is as showing that maximum advantage is just its high-level efficiency, if adopt phosphor material, theoretic internal quantum efficiency can reach 100%.And occupy at present the liquid crystal of demonstration field main flow, due to the restriction of spectral filter, by backlight the losing that has 2/3rds, the loss of efficiency is self-evident.Compare with liquid-crystal display in addition, OLED demonstration also has 180 ° of active illuminating.The present invention is intended to develop new electroluminescent material, and the material relating to has advantages of preparation of being easy to, with low cost, and has good electroluminescent properties.
Summary of the invention
The organic light emission compound (compound 1 – 11) that the object of the present invention is to provide a class to contain acridine core, and be applied to prepare in high performance organic electroluminescence device.
Figure BDA00002342265100021
The synthetic route of compound 1-6 is shown below.Compound 1-6 consists of acridine, phenyl phenanthro-imidazoles and amido (dimethyl amine, diphenylamine, xylyl amine or two fourth phenyl amine).Compound 7-11 acridine and hexichol amido or dimethylbenzene amido form.The concrete synthesis condition condition of compound 1-11 is shown in embodiment.
Compound of the present invention can be used as luminescent layer and prepares electroluminescent device, and the device architecture of employing as shown in Figure 1.Device architecture comprises successively: be attached to ITO on transparent glass as anode, NPB(N, N'-bis-(1-naphthyl)-N, N'-phenylbenzene-1,1'-biphenyl-4,4'-diamines) as hole transmission layer, one or more compound compounds of the present invention as luminescent layer, Bebq 2(two (10 hydroxy benzo quinoline) beryllium) as material of main part and electron transfer layer, LiF as electron injecting layer, metal A l as negative electrode.
Hole and electronics inject from anode and negative electrode respectively, transmit respectively, and finally inject luminescent layer in hole transmission layer and electron transfer layer, and wherein a part of hole and electronics are captured pairing mutually, form exciton.Exciton is got back to ground state by radiative transition, just has light to send.These electroluminescent devices can be used for the Application Areass such as lighting source, signal lamp, aplhanumeric visual display, direction board, photoelectronic coupler, flat-panel monitor.By electroluminescent spectrum, brightness, current/voltage characteristic analytical procedure, test.
Accompanying drawing explanation
Fig. 1: apply prepared by material of the present invention EL device structure schematic diagram;
Fig. 2: apply electroluminescent device spectrogram prepared by compound 1-6 of the present invention.
As shown in Figure 1, each component names is: be attached to ito anode 1, NPB(N on transparent glass, N'-bis-(1-naphthyl)-N, N'-phenylbenzene-1,1'-biphenyl-4,4'-diamines) hole transmission layer 2, the luminescent layer 3, the Bebq that comprise compound of the present invention 2 electron transfer layer 4, LiF electron injecting layer 5, metal A l negative electrode 6.
As shown in Figure 2, its characteristic of the electroluminescent device of the compounds of this invention is as follows: compound 1 transmitting peak position is 532nm, cut-in voltage 2.4V, and high-high brightness is 84340cd/m 2, maximum current efficiency is 9.8cd/A, maximum power efficiency is 11.5lm/W; Compound 2 transmitting peak positions are 532nm, cut-in voltage 2.4V, and high-high brightness is 66040cd/m 2, maximum current efficiency is 7.1cd/A, maximum power efficiency is 8.6lm/W; Compound 3 transmitting peak positions are 544nm, cut-in voltage 2.4V, and high-high brightness is 95605cd/m 2, maximum current efficiency is 11.8cd/A, maximum power efficiency is 13.3lm/W; Compound 4 transmitting peak positions are 564nm, cut-in voltage 2.4V, and high-high brightness is 62480cd/m 2, maximum current efficiency is 7.4cd/A, maximum power efficiency is 8.8lm/W.Compound 5 transmitting peak positions are 508nm, cut-in voltage 2.4V, and high-high brightness is 30950cd/m 2, maximum current efficiency is 5.3cd/A, maximum power efficiency is 4.9lm/W.Compound 6 transmitting peak positions are 512nm, cut-in voltage 2.4V, and high-high brightness is 52930cd/m 2, maximum current efficiency is 7.4cd/A, maximum power efficiency is 8.2lm/W.
Embodiment
Embodiment 1: amido phenanthro-imidazoles acridine synthetic
By 3,6-proflavin (slave ladder Xi Ai company buys for 1.04g, 5mmol), phenanthrenequione (0.42g, 2mmol buy from An Naiji company), ammonium acetate (0.62g, 8mmol) and phenyl aldehyde (0.21g, 2mmol) join in 50ml Glacial acetic acid, at N 2the lower back flow reaction of gas protection 12 hours.Question response finishes rear cooling, and reaction solution is joined in a large amount of water and stirred, and has a large amount of precipitations to generate.To precipitate suction filtration, filter cake washes with water.After dry, solid is separated by column chromatography.The definite molion quality of mass spectroscopy is: 486.5, and (calculated value is: 486.1); Theoretical constituent content (%) C 34h 22n 4: C, 84.26; H, 4.31; N, 11.25; Actual measurement constituent content (%): C, 83.93; H, 4.56; N, 11.51; Above-mentioned analytical results shows, the product of the product of acquisition for estimating.
Example 2: compound 1 synthetic:
By amido phenanthro-imidazoles acridine (360mg, 0.74mmol), cesium carbonate (962mg, 2.96mmol), cuprous iodide (24mg, 0.062mmol) phenanthroline (48mg, 0.124mmol) is in 50ml bottle with two necks, after nitrogen replacement from injecting methyl iodide (420mg, 2.96mmol) and 10ml DMF.Reflux three days.After question response finishes, reaction solution is poured in a large amount of water, filtered, filter cake silica gel column chromatography is obtained to product.The definite molion quality of mass spectroscopy is: 514.1, and (calculated value is: 514.2); Theoretical constituent content (%) C 36h 28n 4: C, 84.02; H, 5.09; N, 10.89; Actual measurement constituent content (%): C, 83.72; H, 5.26; N, 10.90; Above-mentioned analytical results shows, the product of the product of acquisition for estimating.
Embodiment 3: compound 2 synthetic:
By amido phenanthro-imidazoles acridine (360mg, 0.74mmol), cesium carbonate (962mg, 2.96mmol), cuprous iodide (24mg, 0.062mmol) phenanthroline (48mg, 0.124mmol) in 50ml bottle with two necks, after nitrogen replacement from injecting iodobenzene (603mg, 2.96mmol) and 10ml DMF.Reflux three days.After question response finishes, reaction solution is poured in a large amount of water, filtered, filter cake silica gel column chromatography is obtained to product.The definite molion quality of mass spectroscopy is: 638.1, and (calculated value is: 638.3); Theoretical constituent content (%) C 46h 32n 4: C, 86.49; H, 4.73; N, 8.77; Actual measurement constituent content (%): C, 86.03; H, 4.82; N, 9.01; Above-mentioned analytical results shows, the product of the product of acquisition for estimating.
Embodiment 4: compound 3 synthetic:
By amido phenanthro-imidazoles acridine (360mg, 0.74mmol), cesium carbonate (962mg, 2.96mmol), cuprous iodide (24mg, 0.062mmol) phenanthroline (48mg, 0.124mmol) is in 50ml bottle with two necks, after nitrogen replacement from injecting methyl iodobenzene (645mg, 2.96mmol) and 10ml DMF.Reflux three days.After question response finishes, reaction solution is poured in a large amount of water, filtered, filter cake silica gel column chromatography is obtained to product.The definite molion quality of mass spectroscopy is: 666.1, and (calculated value is: 666.3); Theoretical constituent content (%) C 49h 36n 4: C, 86.46; H, 5.14; N, 8.40; Actual measurement constituent content (%): C, 86.81; H, 4.98; N, 8.00; Above-mentioned analytical results shows, the product of the product of acquisition for estimating.
Embodiment 5: compound 6 synthetic:
By amido phenanthro-imidazoles acridine (360mg, 0.74mmol), cesium carbonate (962mg, 2.96mmol), cuprous iodide (24mg, 0.062mmol) phenanthroline (48mg, 0.124mmol) is in 50ml bottle with two necks, after nitrogen replacement from injecting butyl iodobenzene (820mg, 2.96mmol) and 10ml DMF.Reflux three days.After question response finishes, reaction solution is poured in a large amount of water, filtered, filter cake silica gel column chromatography is obtained to product.The definite molion quality of mass spectroscopy is: 750.0, and (calculated value is: 750.4); Theoretical constituent content (%) C 54h 48n 4: C, 86.37; H, 6.17; N, 7.46; Actual measurement constituent content (%): C, 86.26; H, 6.24; N, 7.07; Above-mentioned analytical results shows, the product of the product of acquisition for estimating.
Embodiment 6: compound 7 synthetic:
Get 3,6-proflavin (155mg, 0.74mmol), cesium carbonate (962mg, 2.96mmol), cuprous iodide (24mg, 0.062mmol) and phenanthroline (48mg, 0.124mmol) in 50ml bottle with two necks, after nitrogen replacement, inject iodobenzene (603mg, 2.96mmol), with 10ml DMF, reflux three days.After question response finishes, reaction solution is poured in a large amount of water, filtered, filter cake silica gel column chromatography is obtained to product.Nucleus magnetic hydrogen spectrum 1h NMR (300MHz, DMSO, ppm): δ 8.71 (s, 1H), 7.91 (d, J=9.3Hz, 2H), 7.43-7.38 (m, 8H), 7.22-7.12 (m, 14H), 7.04 (d, J=2.1Hz, 2H).The definite molion quality of mass spectroscopy is: 513.1, and (calculated value is: 513.2); Theoretical constituent content (%) C 37h 27n 3: C, 86.52; H, 5.30; N, 8.18; Actual measurement constituent content (%): C, 86.84; H, 5.09; N, 8.06; Above-mentioned analytical results shows, the product of the product of acquisition for estimating.
Embodiment 7: compound 8 synthetic:
Get 3,6-proflavin (155mg, 0.74mmol), cesium carbonate (962mg, 2.96mmol), cuprous iodide (24mg, 0.062mmol) and phenanthroline (48mg, 0.124mmol) in 50ml bottle with two necks, after nitrogen replacement, inject methyl iodobenzene (645mg, 2.96mmol), with 10ml DMF, reflux three days.After question response finishes, reaction solution is poured in a large amount of water, filtered, filter cake silica gel column chromatography is obtained to product.The definite molion quality of mass spectroscopy is: 569.1, and (calculated value is: 569.3); Theoretical constituent content (%) C 41h 35n 3: C, 86.43; H, 6.19; N, 7.38; Actual measurement constituent content (%): C, 86.83; H, 6.05; N, 7.29; Above-mentioned analytical results shows, the product of the product of acquisition for estimating.
Embodiment 8: compound 11 synthetic:
Get 3,6-proflavin (155mg, 0.74mmol), cesium carbonate (962mg, 2.96mmol), cuprous iodide (24mg, 0.062mmol) and phenanthroline (48mg, 0.124mmol) in 50ml bottle with two necks, after nitrogen replacement, inject butyl iodobenzene (820mg, 2.96mmol), with 10ml DMF, reflux three days.After question response finishes, reaction solution is poured in a large amount of water, filtered, filter cake silica gel column chromatography is obtained to product.The definite molion quality of mass spectroscopy is: 737.3, and (calculated value is: 737.0); Theoretical constituent content (%) C 53h 59n 3: C, 86.29; H, 8.01; N, 5.70; Actual measurement constituent content (%): C, 86.67; H, 8.05; N, 5.62; Above-mentioned analytical results shows, the product of the product of acquisition for estimating.
Embodiment 9: luminescent device [ITO/NPB/Bebq2: compound 1=3%/Bebq2/LiF/Al]
Being coated with on the glass substrate of ito anode evaporation hole transmission layer NPB(thickness be successively
Figure BDA00002342265100071
), the compound 1 of luminescent layer embodiment 1 preparation is as doping agent, Bebq 2as material of main part
Figure BDA00002342265100072
electron transfer layer Bebq 2
Figure BDA00002342265100073
electron injection material LiF
Figure BDA00002342265100074
al negative electrode in evaporate process, keeping pressure is 5 * 10 -6pa.This device transmitting peak position is 532nm, cut-in voltage 2.4V, and high-high brightness is 84340cd/m 2, maximum current efficiency is 9.8cd/A, maximum power efficiency is 11.5lm/W.
Embodiment 10: luminescent device [ITO/NPB/Bebq 2: compound 2=5%/Bebq 2/ LiF/Al] being coated with on the glass substrate of ito anode evaporation hole transmission layer NPB(thickness be successively
Figure BDA00002342265100076
), the compound 2 of luminescent layer embodiment 2 preparations is as doping agent, Bebq 2as material of main part
Figure BDA00002342265100077
electron transfer layer Bebq 2
Figure BDA00002342265100078
electron injection material LiF
Figure BDA00002342265100079
al negative electrode
Figure BDA000023422651000710
in evaporate process, keeping pressure is 5 * 10 -6pa.This device transmitting peak position is 532nm, cut-in voltage 2.4V, and high-high brightness is 66040cd/m 2, maximum current efficiency is 7.1cd/A, maximum power efficiency is 8.6lm/W.
Embodiment 11: luminescent device [ITO/NPB/Bebq 2: compound 3=3%/Bebq 2/ LiF/Al] being coated with on the glass substrate of ito anode evaporation hole transmission layer NPB(thickness be successively
Figure BDA000023422651000711
), the compound 3 of luminescent layer embodiment 3 preparations is as doping agent, Bebq 2as material of main part
Figure BDA000023422651000712
electron transfer layer Bebq 2
Figure BDA000023422651000713
electron injection material LiF
Figure BDA000023422651000714
al negative electrode
Figure BDA000023422651000715
in evaporate process, keeping pressure is 5 * 10 -6pa.This device transmitting peak position is 544nm, cut-in voltage 2.4V, and high-high brightness is 95605cd/m 2, maximum current efficiency is 11.8cd/A, maximum power efficiency is 13.3lm/W.
Embodiment 12: luminescent device [ITO/NPB/Bebq 2: compound 6=5%/Bebq 2/ LiF/Al] being coated with on the glass substrate of ito anode evaporation hole transmission layer NPB(thickness be successively
Figure BDA00002342265100081
), the compound 6 of luminescent layer embodiment 4 preparations is as doping agent, Bebq 2as material of main part
Figure BDA00002342265100082
electron transfer layer Bebq 2
Figure BDA00002342265100083
electron injection material LiF
Figure BDA00002342265100084
al negative electrode
Figure BDA00002342265100085
in evaporate process, keeping pressure is 5 * 10 -6pa.This device transmitting peak position is 564nm, cut-in voltage 2.4V, and high-high brightness is 62480cd/m 2, maximum current efficiency is 7.4cd/A, maximum power efficiency is 8.8lm/W.
Embodiment 13: luminescent device [ITO/NPB/Bebq 2: compound 7=5%/Bebq 2/ LiF/Al] being coated with on the glass substrate of ito anode evaporation hole transmission layer NPB(thickness be successively
Figure BDA00002342265100086
), the compound 7 of luminescent layer embodiment 5 preparations is as doping agent, Bebq 2as material of main part
Figure BDA00002342265100087
electron transfer layer Bebq 2
Figure BDA00002342265100088
electron injection material LiF
Figure BDA00002342265100089
al negative electrode in evaporate process, keeping pressure is 5 * 10 -6pa.This device transmitting peak position is 508nm, cut-in voltage 2.4V, and high-high brightness is 30950cd/m2, and maximum current efficiency is 5.3cd/A, and maximum power efficiency is 4.9lm/W.
Embodiment 14: luminescent device [ITO/NPB/Bebq 2: compound 8=5%/Bebq 2/ LiF/Al] being coated with on the glass substrate of ito anode evaporation hole transmission layer NPB(thickness be successively ), the compound 8 of luminescent layer embodiment 6 preparations is as doping agent, Bebq 2as material of main part
Figure BDA000023422651000812
electron transfer layer Bebq 2
Figure BDA000023422651000813
electron injection material LiF
Figure BDA000023422651000814
al negative electrode
Figure BDA000023422651000815
in evaporate process, keeping pressure is 5 * 10 -6pa.This device transmitting peak position is 512nm, cut-in voltage 2.4V, and high-high brightness is 52930cd/m 2, maximum current efficiency is 7.4cd/A, maximum power efficiency is 8.2lm/W.

Claims (4)

1. the organic light emission compound that contains acridine core, its structural formula is as follows:
2. the application of the organic light emission compound that contains acridine core claimed in claim 1 in preparing electroluminescent device.
3. the application of the organic light emission compound that contains acridine core as claimed in claim 2 in preparing electroluminescent device, is characterized in that: as the luminescent layer of electroluminescent device.
4. the application of the organic light emission compound that contains as claimed in claim 2 or claim 3 acridine core in preparing electroluminescent device, is characterized in that: for the preparation of lighting source, signal lamp, aplhanumeric visual display, direction board, photoelectronic coupler or flat-panel monitor.
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Address before: 130000 Jilin province Changchun Beihu Sheng Technology Development Zone No. 3333 North Street North Lake Science and technology park a B1-1 8 storey building 801 room 002 block

Patentee before: Jilin meta synthetic electronic material Limited by Share Ltd.

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