Donor-acceptor-donor type cyclometalated platinum complex liquid crystal luminescent material and application thereof in polymer polarized electroluminescent device

A technology of luminescent materials and platinum complexes, applied in luminescent materials, liquid crystal materials, electric solid devices, etc., can solve the problems of single types of materials, ignoring the design rules of luminescent materials, and low luminous efficiency of polarizing devices, so as to improve the performance of liquid crystals Effect

Active Publication Date: 2015-08-19
漳州思美科新材料有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, there are not many liquid crystal luminescent materials reported in the literature at present, and their main characteristics are: 1. The material type is single, basically a liquid crystal fluorescent material; 2. The luminous efficiency is not high. 3. Carrier transport performance is not high
Therefore, in view of the bottleneck problems such as very few types of liquid crystal light-emitting materials researched at home and abroad, and low luminous efficiency of polarizing devices, it is of great practical significance to develop new types of high-efficiency light-emitting, high-mobility liquid crystal polarized light-emitting materials and polarized light-emitting devices. research topic
[0006] In the prior art, literature (Wang, Y.; Liu, Y.; Luo, J.; Qi, H.; Li, X.; Ni, M.; Liu, M.; Zhu, M.; Zhu, W. .; Cao, Y. Dalton Transactions, 2011, 40, 5046-5051.), (Shi, J.; Wang, Y.; Xiao, M.; Zhong, P.; Liu, Y.; Tan, H.; Zhu, M.; Zhu, W. Tetrahedron, 2015, 71, 463-469.) and (Wang, Y.; Chen, Q.; Li, Y.; Liu, Y.; Tan, H.; Yu, J. Zhu , M.; Zhu, W.; Cao, Y.Journal of Physical Chemistry C, 2012, 116, 5908-5914.) respectively reported three types of liquid crystal luminescent materials based on cyclometal platinum complexes, but the luminescence of these types of materials Low efficiency and no polarized electroluminescent properties

Method used

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  • Donor-acceptor-donor type cyclometalated platinum complex liquid crystal luminescent material and application thereof in polymer polarized electroluminescent device
  • Donor-acceptor-donor type cyclometalated platinum complex liquid crystal luminescent material and application thereof in polymer polarized electroluminescent device
  • Donor-acceptor-donor type cyclometalated platinum complex liquid crystal luminescent material and application thereof in polymer polarized electroluminescent device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1), preparation of conjugated cyclometal platinum complex: the synthetic route is as follows:

[0034]

[0035]

[0036] Preparation of 3,6-diacetyl-9hydro-carbazole (1):

[0037] In a 250mL single-necked bottle, 9H-carbazole (3.0g, 17.96mmol), aluminum chloride (6.8g, 51.1mmol) and dichloromethane (CH 2 Cl 2 ) (100mL), cooled to 0°C. Acetyl chloride (3.8g, 48.7mmol) was added dropwise to the above mixed system, and then reacted at room temperature for 12h. After the reaction was complete, the solvent was distilled off under reduced pressure, and the residue was recrystallized from ethanol to obtain pale yellow solid 1 (2.24 g, 50%). 1 HNMR (CDCl 3 , 400MHz, TMS), δ (ppm): 8.78 (s, 2H), 8.14 (d, J = 8.2HZ, 2H), 7.50 (d, J = 8.48HZ, 2H), 2.7 (s, 6H).

[0038] Preparation of 3,6-diethyl-9hydro-carbazole (2):

[0039] In a 250 mL one-necked bottle, sequentially add compound 1 (3.0 g, 17.96 mmol), aluminum trichloride (6.8 g, 51.1 mmol) and tetrahydrofuran (THF) ...

Embodiment 2

[0087] Fabrication scheme and luminescent performance test of polymer polarized electroluminescent device:

[0088] The structure of the polymer polarized electroluminescent device is: ITO / PEDOT:PSS(30nm) / PVK(30nm) / PFO:Pt2or Pt4(80:20,70nm) / B3YMPM(50nm) / Ca(100nm) / Al(100nm) . The hole transport layer is a polyvinylcarbazole (PVK) coating; the electron transport layer is B3YMPM; the light-emitting layer is a blend coating of a guest material (Pt2 or Pt4) and a host material; the host material is poly(9,9-dioctyl base) fluorene (PFO); the cathode layer is composed of metallic calcium and aluminum.

[0089] The fabrication procedure of the device: On the treated ITO glass, spin-coat 30nm polydioxyethylthiophene / polystyrene sulfonic acid (PEDOT-PSS) (Bayer Batron P4083) hole injection layer, 30nm PVK hole Hole transport layer and 70nm light-emitting layer, 50nm electron transport layer, and then sequentially vapor-deposit 100nm calcium (Ca) layer and 100nm aluminum (Al) layer. T...

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Abstract

The invention discloses a donor-acceptor-donor type cyclometalated platinum complex liquid crystal luminescent material and application thereof in a polymer polarized electroluminescent device. According to the cyclometalated platinum complex liquid crystal luminescent material, benzophenanthrene derivative is connected to a phenylpyridine-carbazole derivative by means of conjugation or non-conjugation to form a cyclometalated ligand, and a propanedione derivative is employed to form an auxiliary ligand. The cyclometalated platinum complex is adopted as the luminescent layer doping agent, poly(9,9-dioctylfluorene) (PFO) is taken as the host material, and through rubbing alignment and heating annealing, a luminescent layer can be prepared, and the polymer polarized electrogenerated white light-emitting device with a polarization ratio of 1.32 can be obtained.

Description

technical field [0001] The invention relates to a donor-acceptor-donor type (D-A-D type) cyclometal platinum complex liquid crystal luminescent material and its application in polymer polarized OLEDs, belonging to the field of polarized electroluminescent materials and applications. Background technique [0002] Liquid crystal display (LCD) has been widely used in computer monitors, televisions and other display fields due to its flat panel, low power consumption, no electromagnetic radiation, high resolution, high contrast, digital interface, easy integration and portability. Mainstream in flat panel displays. However, the liquid crystal display is a passive display device, which requires a backlight to realize transmissive or reflective display. The backlight source is a very important part of the liquid crystal display, which accounts for 20% to 30% of the cost of all materials of the liquid crystal display device. At present, the backlight source of LCD is mainly cold-...

Claims

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Application Information

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IPC IPC(8): C07F15/00C09K11/06C09K19/40H01L51/54
CPCC09K11/06C09K19/40C07F15/0086C09K2211/185H10K85/346
Inventor 王亚飞石军伟朱卫国刘煜谭华朱美香
Owner 漳州思美科新材料有限公司
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