Microscale Lateral Perovskite Light Emitting Diode Realized by Self-Doping Phenomenon

Area of Science:

• Optoelectronics
• Materials Science
• Nanotechnology

Background:

• High-definition near-eye displays require miniaturized light-emitting pixels.
• Perovskite light-emitting diodes (PeLEDs) offer high efficiency and tunable spectra but face processing limitations.
• Current PeLEDs exceed 50 μm due to perovskite solubility issues in photoresists.

Purpose of the Study:

• To overcome the processing challenges hindering the miniaturization of PeLEDs.
• To develop microscale PeLEDs suitable for advanced optoelectronic applications.
• To enable the integration of perovskite materials into micro/nano optoelectronic devices.

Main Methods:

• Fabrication of a plane-structured PeLED device.
• Utilizing a patterned substrate for device fabrication.
• Regulating ion distribution in perovskite via self-doping to form a PN junction.

Main Results:

• Achieved microscale light-emitting diodes with single pixel sizes < 2 μm.
• Demonstrated a luminescence lifetime of approximately 3 seconds.
• Overcame the incompatibility of perovskites with conventional photoresist processing.

Conclusions:

• The developed PeLEDs represent a significant advancement for micro/nano optoelectronics.
• This method enables the fabrication of ultra-small PeLEDs, overcoming previous size limitations.
• Opens new possibilities for perovskite integration in next-generation display technologies and microdevices.