Unlock instant, AI-driven research and patent intelligence for your innovation.
Organic luminescent material with thermally induced delayed fluorescence performance, preparation method and application thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of thermally induced delayed fluorescence and luminescent materials, which is applied in the fields of luminescent materials, fluorescence/phosphorescence, and material analysis through optical means. High fluorescence quantum yield, good solubility effect
Active Publication Date: 2021-09-21
HANGZHOU NORMAL UNIVERSITY
View PDF8 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0007] Generally speaking, some of the existing organic light-emitting materials with thermally induced delayed fluorescence performance still have deficiencies. For example, organic electroluminescent devices based on TADF materials as the object generally have complex device structures, rapid efficiency decay, and unstable phenomena. In the actual application process, the device preparation procedure is simplified, the device efficiency is stabilized, and higher requirements are put forward for the design of luminescent materials.
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0060] (1) Synthesis of intermediate 2,6-dibromo-cyclofluorenone dithiophene, the synthetic route is as follows:
[0061]
[0062] Add 3,3-dibromo-2,2-bithiophene (2.55g, 7.87mmol) into a 200ml Zelanque bottle, pump it through three times, add 50ml of ether, put it into a low-temperature box that has been precooled to -78°C, and slowly add n-Butyllithium (8.04ml, 18.89 mmol), after 2 hours of reaction, 100ml of dimethylcarbamoyl chloride was added, stirred overnight to room temperature, quenched with ice water, extracted with ether, dried over anhydroussodiumsulfate, separated by silica gelcolumn chromatography, Chloromethane / petroleumether (v:v)=1:1 is used as eluent, the product is dark purple powder, yield: 68%, elemental analysis theoretical value C 9 h 4 OS 2 (%): C 56.23, H 2.10, O 8.32. Found values: C 56.28, H 2.08, O 8.28;
[0063] Add the dark purple powder cyclofluorenone dithiophene and N-bromosuccinimide obtained above with a molar ratio of 1:2 into an o...
[0078] Putting 2,6-dibromo-cyclofluorenone dithiophene and carbazole into the reaction at a molar ratio of 1:2, a double-sided carbazole-substituted cyclofluorenone dithiophene can be synthesized with a yield of 86% and a theoretical value of C 33 h 18 N 2 OS 2 (%): C 75.84, H 3.47, N 5.36. Found values: C 75.78, H 3.52, N 5.43.
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
Login to View More
Abstract
The invention discloses an organic luminescent material with thermally-induced delayed fluorescence performance and its preparation method and application, belonging to the technical field of organic luminescent materials. Combined with the acceptor unit, a bipolar organic small moleculeluminescent material is formed. The organic luminescent material with thermally delayed fluorescence performance prepared by the present invention is a D-A structure (Donor-Acceptor type) containing cyclofluorenone dithiophene unit, has good hole / electron transport performance, high fluorescencequantum High yield, can be widely used in the field of organic electroluminescent devices, anti-counterfeiting, chemical and biological detection, biological imaging and other fields; the cyclofluorenone dithiophene intermediate prepared by the present invention has good solubility in the organic phase and can be used in evaporation devices , is also suitable for spin-coated devices.
Description
technical field [0001] The invention relates to the technical field of organic light-emitting materials, in particular to a bipolar organic light-emitting material with thermally induced delayed fluorescence performance based on cyclofluorenone dithiophene as a skeleton, a preparation method and application thereof. Background technique [0002] Organic light-emitting diodes (OLEDs) have great application prospects in the fields of display and lighting due to the advantages of ultra-thin, light weight, low energy consumption, active light emission, wide viewing angle, and fast response. more and more people's attention. [0003] In the past 30 years, the vast number of scientific researchers have never stopped exploring organic optoelectronic functional materials with high exciton utilization. In 1998, Forrest et al. discovered electrophosphorescence by using metal complexes, and phosphorescent objects based on heavy metal complexes The material has been developed rapidly (...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More