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Updated: Jan 29, 2026
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Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
Published on: November 16, 2018
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Enhanced outcoupling in down-conversion white organic light-emitting diodes using imprinted microlens array films
Joo Won Han1, Chul Woong Joo2, Jonghee Lee3
1Department of Display Engineering, Pukyong National University, Busan, Republic of Korea.
Science and Technology of Advanced Materials
|February 6, 2019
Summary
High-performance down-conversion microlens array (DC-MLA) films boost white organic light-emitting diodes (OLEDs). These novel films enhance light outcoupling efficiency and color rendering for brighter, more efficient displays.
Area of Science:
- Materials Science
- Optoelectronics
- Polymer Science
Background:
- White organic light-emitting diodes (OLEDs) are crucial for display technologies.
- Improving light outcoupling efficiency and color rendering in white OLEDs remains a key challenge.
- Current methods for enhancing OLED performance often involve complex fabrication processes.
Purpose of the Study:
- To develop high-performance down-conversion microlens array (DC-MLA) films for white OLEDs.
- To investigate a novel imprinting method for fabricating DC-MLA films.
- To evaluate the impact of DC-MLA films on OLED efficiency and light quality.
Main Methods:
- Fabrication of DC-MLA films using an imprinting method based on breath figure patterns on polymer substrates.
- Integration of DC-MLA films into white OLED devices.
- Measurement of external quantum efficiency, power efficiency, and color-rendering index.
Main Results:
- DC-MLA films were successfully fabricated using a simple imprinting process.
- External quantum efficiency of OLEDs with DC-MLA films increased by 1.35 times.
- Power efficiency of OLEDs with DC-MLA films increased by 1.86 times.
- A high color-rendering index of 84.3 was achieved for white OLEDs with DC-MLA films.
Conclusions:
- Novel DC-MLA films fabricated via an imprinting method significantly enhance white OLED performance.
- The developed films improve both light outcoupling efficiency and color quality.
- This approach offers a promising pathway for developing highly efficient white OLEDs.
Keywords:
201 Electronics / Semiconductor / TCOs204 Optics / Optical applications, organic light-emitting diodes40 Optical, magnetic and electronic device materialsOrganic light-emitting diodesdown-conversionlight extractionoutcoupling structureswhite OLEDMore Related Videos
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