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3-Dimensional Microlens Printing of Quantum Dot/Siloxane Hybrid Color-Converter for Highly Efficient and Stable
Somin Park1, Yongmin Shin1, Jiho Joo2
1Wearable Platform Materials Technology Center (WMC), Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro 291, Yuseong-gu, Daejeon 34141, Republic of Korea.
ACS Applied Materials & Interfaces
|January 16, 2026
Summary
We developed a stable, hybrid quantum dot (QD) material for micro-light-emitting diode (micro-LED) displays. This QD-fumed silica/siloxane composite offers enhanced performance and durability, overcoming limitations of current QD technologies.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Quantum dots (QDs) are key for advanced micro-light-emitting diode (micro-LED) displays but suffer from poor stability and scalability.
- Existing QD-based color-converting layers (CCLs) face challenges in practical application due to degradation under operational stress.
Purpose of the Study:
- To engineer a hybrid color-converting layer (CCL) using QDs, fumed silica nanoparticles (FSNs), and a siloxane matrix.
- To enhance the optical performance and long-term stability of QDs for micro-LED display applications.
- To demonstrate the feasibility of a QD-based CCL for high-performance full-color displays.
Main Methods:
- Synthesized a QD-FSN/siloxane hybrid material via an in situ sol-gel process.
- Incorporated FSNs as scattering and thixotropic agents to improve light extraction and enable 3D microdispensing.
- Fabricated dome-shaped microlens arrays (QD-FSN/siloxane-based CCLs) for micro-LED integration.
Main Results:
- The QD-FSN/siloxane films exhibited excellent photoluminescent quantum yield (PLQY) and remarkable stability under harsh conditions (air, chemicals, heat, humidity, blue light).
- Achieved natural white emission with high uniformity and a wide color gamut (110.4% NTSC, 82.4% Rec. 2020).
- A 333 μm pixel pitch full-color QD micro-LED device showed a 25.2% increase in luminous flux.
Conclusions:
- The QD-FSN/siloxane hybrid material offers a promising solution for stable and high-performance micro-LED displays.
- The developed material overcomes critical stability and scalability issues, paving the way for advanced display technologies.
- This work highlights the potential of QD-FSN/siloxane composites for next-generation optoelectronic devices.
