Unlock instant, AI-driven research and patent intelligence for your innovation.

Thermal-stability and high-mobility non-doped organic laser material of carbazole ladder-type polyphenyl based on ladder-type oligo(polyfluorene)

An oligomeric fluorene and carbazole technology, applied in the field of organic semiconductor optoelectronics, can solve the problems of exciton quenching, low carrier mobility, and material performance degradation.

Active Publication Date: 2016-10-12
NANJING UNIV OF POSTS & TELECOMM
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the realization of electrically pumped organic semiconductor lasers still faces a series of problems. Due to the nature of organic semiconductor materials, their electrical conductivity is poor and the carrier mobility is very low. Concentrations reached very high concentrations, resulting in light loss and exciton quenching
In addition, the thermal stability of most organic materials is far inferior to that of inorganic functional materials, and the local overheating caused by high current density will also cause the degradation of material properties.

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
  • Thermal-stability and high-mobility non-doped organic laser material of carbazole ladder-type polyphenyl based on ladder-type oligo(polyfluorene)
  • Thermal-stability and high-mobility non-doped organic laser material of carbazole ladder-type polyphenyl based on ladder-type oligo(polyfluorene)
  • Thermal-stability and high-mobility non-doped organic laser material of carbazole ladder-type polyphenyl based on ladder-type oligo(polyfluorene)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] In this example, the organic semiconductor material of biscarbazole ladder-type polyphenylene based on ladder-type oligofluorene is prepared, and the specific steps are as follows:

[0060] The first is the preparation of reactant B, the specific process is as follows:

[0061] (a) Preparation of Intermediate A:

[0062] Take a certain amount of 2-bromofluorene in a reaction flask, add bromoisoctane, then add TBAB as a catalyst, and finally add a NaOH solution with a mass fraction of 50%, and then add an appropriate amount of DMSO as a reaction solvent. Stop the reaction after the reaction 24 disappears, extract the organic phase with a large amount of water and DCM, combine the organic phases to concentrate, separate and purify through column chromatography, and obtain a transparent liquid product A with a yield of 95%, wherein the molecular formula of product A is :

[0063]

[0064] (b) Preparation of reactant B

[0065] Take the above-mentioned product in a cl...

Embodiment 2

[0080] This embodiment is the measurement of the photoluminescence spectrum of the organic semiconductor material based on the ladder-type oligofluorene-based biscarbazole ladder-type polyphenylene prepared in Example 1:

[0081] The toluene dilute solution that the product of embodiment 1 is made into. Shimadzu UV-3150 ultraviolet-visible spectrometer and RF-530XPC fluorescence spectrometer were used to measure the absorption spectrum and emission spectrum, and the photoluminescence spectrum was measured at the maximum absorption wavelength of ultraviolet absorption. The solid film was prepared by solution spin-coating film-forming technique.

Embodiment 3

[0083] This embodiment is the thermal analysis and determination of the organic semiconductor material based on ladder-type oligofluorene-based biscarbazole ladder-type polyphenylene prepared in Example 1:

[0084] Thermogravimetric analysis (TGA) was performed on a Shimadzu DTG-60H thermogravimetric analyzer with a heating scan rate of 10 °C / min and a nitrogen flow rate of 20 cm 3 / min. Differential scanning calorimetry (DSC) was carried out on a Shimadzu DSC-60A tester. The sample was first heated at a rate of 10°C / min to a state ten degrees Celsius lower than the decomposition temperature of the sample, and then, under liquid nitrogen conditions The temperature was lowered back to the starting temperature, and the temperature was scanned at a rate of 10°C / min for the second time.

[0085] figure 1 is the thermogravimetric analysis (TGA) curve of the product of embodiment 1 of the present invention, figure 2 is the differential scanning calorimetry (DSC) curve of the pro...

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

No PUM Login to View More

Abstract

The invention belongs to the technical field of organic photoelectric materials. The invention discloses an organic semiconductor material of carbazole ladder-type polyphenyl based on ladder-type oligo(polyfluorene), and preparation and application of the material. The organic semiconductor material is a polymer material taking ladder-type polyphenyl as an intermediate parent and carbazole as an end group. The organic semiconductor material is prepared by a Ullman coupling reaction of the ladder-type polyphenyl and the carbazole. The organic semiconductor material has an organic non-doped solid laser property and can be used as a gain medium in an organic non-doped solid laser device and an organic light-emitting diode device. The dicarbazole ladder-type polyphenyl based on ladder-type oligo(polyfluorene) provided by the invention has the advantages of higher mobility, favorable thermal and chemical stability, better fluorescence quantum efficiency, ultralow ASE (amplifier spontaneous emission) threshold, simple preparation and processing technology, large photoabsorption cross-section, high synthesis yield and the like.

Description

technical field [0001] The invention belongs to the field of organic semiconductor optoelectronic technology, and in particular relates to an organic semiconductor material based on ladder type oligofluorene and its preparation and application. Background technique [0002] Since the first ruby ​​laser came out in 1960, it has triggered tremendous changes in the field of science and technology and promoted the development and progress of the human world. Today laser optics and materials science play a crucial role in the development of new lasers, leading to great interest in the exploration of laser materials. Among them, organic semiconductor materials are a class of laser materials with important application prospects. Like inorganic semiconductor lasers, organic semiconductor lasers have also experienced a long development process. In terms of polymer lasers, the first breakthrough was a derivative of the conjugated polymer PPV, which realized optically pumped lasers in...

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
IPC IPC(8): C07D209/86C09K11/06H01L51/54H01L51/50
CPCC09K11/06C07D209/86C09K2211/1029H10K85/624H10K85/6572H10K50/00
Inventor 钱妍李燕黄维解令海
Owner NANJING UNIV OF POSTS & TELECOMM