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Photoluminescence: Applications

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core

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Thermally Activated Delayed Fluorescence Polymers for Efficient Solution-Processed Organic Light-Emitting Diodes.

Sae Youn Lee¹, Takuma Yasuda^1,2, Hideaki Komiyama^2,3

¹Department of Applied Chemistry and Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.

Advanced Materials (Deerfield Beach, Fla.)

|March 23, 2016

Summary

New π-conjugated polymers utilize thermally activated delayed fluorescence (TADF) for efficient solution-processed organic light-emitting diodes (OLEDs). These benzophenone-based materials achieve high electroluminescence efficiencies up to 9.3%.

Keywords:

benzophenone organic light-emitting diodes polymers solution processes thermally activated delayed fluorescence

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Development of Efficient OLEDs from Solution Deposition

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Development of Efficient OLEDs from Solution Deposition

Development of Efficient OLEDs from Solution Deposition

Published on: November 4, 2022

Area of Science:

Materials Science
Organic Electronics
Photophysics

Background:

Organic light-emitting diodes (OLEDs) are crucial for displays and lighting.
Thermally activated delayed fluorescence (TADF) offers a pathway to high efficiency in OLEDs.
Solution-processing is desirable for cost-effective OLED manufacturing.

Purpose of the Study:

To develop novel π-conjugated polymers for solution-processed TADF-OLEDs.
To investigate the structure-property relationships of benzophenone-based TADF polymers.
To achieve high external electroluminescence efficiencies in solution-processed TADF-OLEDs.

Main Methods:

Synthesis of benzophenone-based alternating donor-acceptor π-conjugated polymers.
Fabrication of OLED devices using the synthesized TADF polymers as emitters.
Characterization of photophysical properties and device performance.

Main Results:

Developed TADF polymers with small energy gaps (∆EST) due to benzophenone-based structures.
Achieved efficient exciton harvesting via TADF mechanism.
Demonstrated high maximum external electroluminescence efficiencies of up to 9.3% in solution-processed OLEDs.

Conclusions:

Benzophenone-based TADF polymers are promising for high-performance, solution-processed OLEDs.
The developed materials enable efficient light emission through TADF.
This work contributes to the advancement of cost-effective and efficient OLED technology.