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Related Experiment Video

Updated: Jun 27, 2025

Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications
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Electrohydrodynamic Inkjet Printing of Three-Dimensional Perovskite Nanocrystal Arrays for Full-Color Micro-LED

Yihang Chen1,2, Xiao Yang1,2,3, Xiaotong Fan1,2

  • 1Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361005, Fujian, China.

ACS Applied Materials & Interfaces
|May 6, 2024
PubMed
Summary

Researchers developed a new red perovskite nanocrystal (PeNC) ink for inkjet printing. This innovation enhances brightness and stability in 3D PeNC arrays for advanced micro-light-emitting-diode (micro-LED) displays.

Keywords:
color conversion layerelectrohydrodynamic inkjet printingmicro-LED displaysperovskite nanocrystalsthree-dimensional arrays

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Perovskite nanocrystal (PeNC) arrays offer narrow emission and tunable wavelengths for next-generation micro-light-emitting-diode (micro-LED) displays.
  • Electrohydrodynamic (EHD) inkjet printing is a promising technique for fabricating PeNC arrays due to its high resolution and cost-effectiveness.
  • Challenges remain in producing red PeNC arrays with sufficient brightness and stability for micro-LED applications.

Purpose of the Study:

  • To design a red PeNC colloidal ink for EHD inkjet printing.
  • To enhance luminescence and stability of 3D PeNC arrays.
  • To enable fabrication on both rigid and flexible substrates for micro-LED displays.

Main Methods:

  • Formulation of a PeNC colloidal ink using PeNCs, polystyrene (PS) polymer, and xylene solvent.
  • Utilizing EHD inkjet printing for precise fabrication of 3D PeNC arrays.
  • Characterization of the printed arrays for luminescence, stability, and spatial resolution.

Main Results:

  • The developed PeNC ink enabled precise control over array size and shape, facilitating micropillar construction.
  • Inclusion of PS significantly boosted brightness and environmental stability of the PeNC arrays.
  • EHD printing successfully produced full-color 3D PeNC arrays with a spatial resolution exceeding 2500 ppi.

Conclusions:

  • The novel PeNC colloidal ink is suitable for EHD inkjet printing of high-performance 3D PeNC arrays.
  • This strategy offers potential for creating high-resolution, robust PeNC color conversion layers for advanced micro-LED displays.
  • The method demonstrates adaptability for both rigid and flexible display substrates.