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Efficient Perovskite Light-Emitting Diodes with a Patterned Emitting Layer Formed through Inkjet-Printing-Induced Ion
Chang Gao1, Bo Song1, Yan Yin1
1Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China.
The Journal of Physical Chemistry Letters
|December 17, 2025
Summary
Inkjet printing of perovskite light-emitting diodes (PeLEDs) is now competitive for displays. This study merges ion-exchange chemistry with inkjet patterning for high-performance PeLEDs.
Area of Science:
- Materials Science
- Optoelectronics
- Chemistry
Background:
- Organic-inorganic halide perovskites offer high luminescence and color purity.
- Perovskite light-emitting diodes (PeLEDs) are nearing commercialization, requiring advanced patterning.
- Current inkjet-printed PeLEDs show limited efficiency and luminance.
Purpose of the Study:
- To develop high-definition patterning for PeLEDs using inkjet printing.
- To enhance the performance of inkjet-printed PeLEDs.
- To enable the fabrication of hole-transport-layer-free electroluminescent devices.
Main Methods:
- Merging *in situ* ion-exchange chemistry with inkjet patterning.
- Fabricating devices where 2D perovskite precursors convert to 3D perovskites on-substrate.
- Developing hole-transport-layer-free electroluminescent devices.
Main Results:
- Achieved a peak luminance of 10,730 cd/m2.
- Reached a current efficiency of 12.11 cd/A.
- Demonstrated competitive performance for inkjet-printed perovskite devices.
Conclusions:
- The developed method significantly enhances inkjet-printed PeLED performance.
- This technique makes perovskite devices competitive for next-generation displays.
- Hole-transport-layer-free devices were successfully fabricated using this approach.
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