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Capillary-Assisted Ultrafast and Large-Area Perovskite Nanocrystal Patterning Technology for Color Conversion

Xiaotong Fan1,2, Shuli Wang1,3, Xinyi Shan4

  • 1Department of Electronic Science, Xiamen University, Xiamen, Fujian 361005, China.

ACS Applied Materials & Interfaces
|February 13, 2026
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Summary
This summary is machine-generated.

We developed capillary-assisted ultrafast patterning (CAP) for perovskite nanocrystal (PNC) color conversion layers (CCLs). This method enables rapid, large-area fabrication of high-performance micro-LED displays.

Keywords:
color conversion layermicro-LED displayspatterningperovskitethrough-hole glass

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Display Technology

Background:

  • Perovskite nanocrystals (PNCs) offer superior color properties for micro-LED displays.
  • Challenges exist in large-area, efficient patterning of PNCs for displays.

Purpose of the Study:

  • To introduce a novel, ultrafast patterning technology for PNC color conversion layers (CCLs).
  • To demonstrate the scalability and stability of PNC CCLs fabricated using this method.
  • To evaluate the performance of micro-LED displays incorporating these PNC CCLs.

Main Methods:

  • Developed capillary-assisted ultrafast PNC patterning (CAP) technology.
  • Fabricated PNCs within laser-processed through-hole glass arrays.
  • Utilized capillary filling and solvent evaporation for PNC deposition.
  • Assessed photoluminescence quantum yield stability and device performance.

Main Results:

  • Achieved rapid fabrication of a 70 cm² PNC CCL in approximately 2 minutes.
  • Demonstrated high photoluminescence quantum yield stability under ambient storage and blue light irradiation.
  • Successfully integrated CAP-fabricated PNC CCLs into a 0.7-inch full-color micro-LED panel.
  • Exhibited excellent color conversion performance in the proof-of-concept display.

Conclusions:

  • CAP technology provides a scalable and efficient method for patterning PNCs for advanced display applications.
  • The fabricated PNC CCLs exhibit excellent stability and color performance.
  • This technique holds significant potential for the commercialization of high-quality micro-LED displays.