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Fluorescent Supramolecular Polymers Based on Pillar[5]arene for OLED Device Fabrication
Xiye Yang1, Wanqing Cai1, Sheng Dong1
1State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, People's Republic of China.
ACS Macro Letters
|June 2, 2022
Summary
New supramolecular polymers (SP) exhibit tunable light emission. Researchers developed pillar[5]arene-based SPs with efficiencies up to 81.6%, achieving tunable blue-to-green light in devices.
Area of Science:
- Supramolecular chemistry
- Materials science
- Optoelectronics
Background:
- Supramolecular polymers (SP) offer tunable properties through host-guest interactions.
- Pillar[5]arene macrocycles are effective hosts for creating SPs.
- Controlling the photophysical properties of SPs is crucial for optoelectronic applications.
Purpose of the Study:
- To develop novel AA/BB-type supramolecular polymers (SP1-3) utilizing pillar[5]arene host-guest chemistry.
- To investigate the photoelectric and electroluminescence properties of these new SPs.
- To demonstrate the tunability of light emission color and achieve high photoluminescent efficiencies.
Main Methods:
- Synthesis of pillar[5]arene-based supramolecular polymers (SP1-3).
- Confirmation of polymer formation using nuclear magnetic resonance (NMR) and specific viscosity measurements.
- Evaluation of electroluminescence properties and photoluminescent efficiencies.
- Fabrication of light-emitting devices (LEDs) using SPs as emissive layers (EMLs).
Main Results:
- Successful development and characterization of supramolecular polymers (SP1-3).
- Demonstrated tunable light emission from blue to green via doping strategies and exciton trapping with guest G2.
- Achieved high photoluminescent efficiencies up to 81.6%.
- Attained a maximum luminance efficiency (LE) of nearly 5 cd A⁻¹ in fabricated LEDs.
Conclusions:
- Pillar[5]arene-based supramolecular polymers are promising materials for optoelectronic applications.
- The developed SPs exhibit controllable light emission and high efficiencies.
- These findings pave the way for advanced light-emitting devices with tailored optical properties.
