Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Light-emitting polymers containing boron/sulfur (selenium, tellurium) hybrid fused ring units and their electroluminescent devices

A technology of polymer compounds and fused rings, which is applied in the fields of electrical solid-state devices, semiconductor/solid-state device manufacturing, and luminescent materials, and can solve problems such as reduced external quantum efficiency of devices, low color purity, and complex device structures.

Active Publication Date: 2022-02-18
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this D-A structure shows a large Stokes shift due to the vibrational relaxation of its excited state, and the luminescence spectrum is wide, and the half-maximum width (FWHM) is generally 70-100nm, resulting in low color purity. In practical applications It is often necessary to use a filter or construct an optical microcavity to improve the color purity, but this will lead to a decrease in the external quantum efficiency of the device or a complicated device structure.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Light-emitting polymers containing boron/sulfur (selenium, tellurium) hybrid fused ring units and their electroluminescent devices
  • Light-emitting polymers containing boron/sulfur (selenium, tellurium) hybrid fused ring units and their electroluminescent devices
  • Light-emitting polymers containing boron/sulfur (selenium, tellurium) hybrid fused ring units and their electroluminescent devices

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0155]The present invention also provides a method for preparing a light-emitting polymer compound containing boron / sulfur (selenium, tellurium) hybrid fused ring units as described above, comprising the following steps:

[0156] (i) under an inert atmosphere, the monomer of structure shown in formula (Z) is mixed with initiator A and solvent A1, reacts under protective gas atmosphere, then cools, settles in solvent A2, filters, obtains formula ( Ⅰ) The polymer shown.

[0157] The reaction time is preferably 40-120°C; more preferably 50-110°C; the reaction time is preferably 8-72 hours; more preferably 10-60 hours; the cooling is preferably cooling to room temperature. The present invention does not limit the specific operation of the sedimentation and filtration, as long as those skilled in the art are familiar with it.

[0158] Or under an inert atmosphere, mix the monomer with the structure shown in formula (Z) with initiator B, catalyst B, ligand B and solvent B1, react u...

Embodiment 1

[0194] The reaction formula is as follows:

[0195]

[0196] Under argon atmosphere, weigh M in a 10mL Schlenk bottle 2 -1 and azobisisobutyronitrile (AIBN), add 2.5mL tetrahydrofuran (THF) into the bottle, raise the temperature to 65°C, stir and react under argon protection for 48 hours, then cool to room temperature, pour the reaction solution into acetone The precipitated solid was filtered and vacuum-dried to obtain the desired polymer.

[0197] Statistics and characterization were performed on the polymer compound prepared in Example 1 of the present invention.

[0198] For PSS-TB: Feeding is M 2 -1 (0.91mmol) and AIBN (0.018mmol), the yield is 51%, the number average molecular weight of the polymer is 13,600g / mol, the weight average molecular weight is 26,100g / mol, and the degree of dispersion (PDI) is 1.92.

Embodiment 2

[0200] The reaction formula is as follows:

[0201]

[0202] Under argon atmosphere, weigh M in a 10mL Schlenk bottle 2 -2 and ethyl α-bromoisobutyrate, take 2.5mL N,N-dimethylformamide (DMF) into the bottle, stir to make it fully dissolved, add N,N,N',N,'N "-Pentamethyldiethylenetriamine (PMDETA). The reaction system was frozen in liquid nitrogen for 7 minutes, vacuumized for 4 minutes, and then filled with nitrogen, and then the reaction system was placed in a water bath at 25 ° C. The system was thawed and then put into liquid nitrogen to freeze, and the above operation was repeated three times. Weighed cuprous bromide and added it to the reaction system and reacted at 60°C for 4 hours. After the reaction was completed, the reaction was quenched with liquid nitrogen, and the copper salt was removed by column separation. After the solution was concentrated, it was poured into acetone, and the precipitated solid was filtered and vacuum-dried to obtain the desired polymer....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
dispersityaaaaaaaaaa
divergenceaaaaaaaaaa
Login to View More

Abstract

The invention provides a light-emitting polymer compound containing boron / sulfur (selenium, tellurium) hybrid condensed ring units, which has a structure represented by formula (I), formula (II) or formula (III). The boron / sulfur (selenium, tellurium) hybrid fused ring unit is used as the light-emitting unit, and the resonance effect between the boron atom and the sulfur (selenium, tellurium) atom is used to realize the separation of HOMO and LUMO, and achieve a smaller ΔE ST And the TADF effect; the boron / sulfur (selenium, tellurium) hybrid fused ring unit has a rigid skeleton structure, which can reduce the degree of relaxation of the excited state structure, thereby achieving a narrower half-peak width. It is also possible to introduce a hole transport unit and / or an electron transport unit into the side chain of the polymer, so that the polymer has good carrier transport capability, thereby achieving high device efficiency. Using the polymer of the present invention as the light-emitting layer of the solution processing device can realize narrow electroluminescent half-peak width and high device external quantum efficiency without the need for optical filters and microcavity structures.

Description

technical field [0001] The invention relates to the field of organic light-emitting materials, in particular to a light-emitting polymer compound containing boron / sulfur (selenium, tellurium) hybrid condensed ring units, a preparation method thereof and an organic electroluminescence device. Background technique [0002] Organic light-emitting devices (OLEDs) are usually composed of a cathode, an anode, and an organic layer inserted between the cathode and the anode, that is, the device is composed of a transparent ITO anode, a hole injection layer (TIL), a hole transport layer (HTL), Light emitting layer (EL), hole blocking layer (HBL), electron transport layer (ETL), electron injection layer (EIL) and cathode are formed, and 1~2 organic layers can be omitted as required. The mechanism of action is to form a voltage between the two electrodes, one side injects electrons from the cathode, and the other side injects holes from the anode, the electrons and holes recombine in t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F112/14C08F212/08C08F212/14C09K11/06H01L51/54H01L51/50
CPCC08F112/30C08F212/08C08F212/26C09K11/06C09K2211/1491C09K2211/1466C09K2211/1483C09K2211/1475C09K2211/145C09K2211/1458C09K2211/1433C09K2211/1416H10K85/141H10K85/151H10K50/11C08F212/30
Inventor 王利祥邵世洋陈凡赵磊王淑萌王兴东吕剑虹
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com