Simple Process for Flexible Light-Extracting QD Film and White OLED
Eun Jeong Bae1,2, Tae Jeong Hwang2, Geun Su Choi1,2
1Display and Nanosensor Laboratory, Department of Electrical Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
Micromachines
|December 31, 2025
Summary
Flexible quantum dot (QD) films offer enhanced color conversion and light extraction for next-generation displays. This cost-effective method improves OLED efficiency and enables white light generation for displays and lighting applications.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Quantum dots (QDs) exhibit high color purity, photoluminescence, and power efficiency, making them ideal for advanced displays.
- Flexible films are crucial for next-generation electronic devices, including displays and lighting.
Purpose of the Study:
- To develop a simple, cost-effective method for fabricating flexible QD films.
- To enhance light extraction efficiency and enable color conversion for OLED applications.
- To demonstrate the potential of QD films for creating white light.
Main Methods:
- Fabrication of single- and multiple-layer flexible QD/PDMS composite films.
- Utilizing reactive ion etching (RIE) to create low-density structures for enhanced light extraction.
- Integrating QD/PDMS films as external layers onto OLEDs.
Main Results:
- Achieved excellent light extraction efficiency up to 9.2% with QD/PDMS composite films.
- Demonstrated effective color conversion capabilities of the QD films.
- Successfully produced white light (CIEx,y = 0.28, 0.41) by combining QD/PDMS films with greenish-blue OLEDs.
Conclusions:
- The presented method offers a simple, cost-effective alternative for fabricating flexible QD films.
- QD/PDMS composite films show significant potential for enhancing OLED performance in displays and lighting.
- This approach facilitates broad applications in flexible displays and solid-state lighting.
