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All-Optically Switchable Platform Based on Phase-Change Material for Light-Emitting Device
Olga Kushchenko1, Elena Bodiago1, Daniil Litvinov1
1School of Physics and Engineering, ITMO University, St Petersburg 197101, Russia.
ACS Applied Materials & Interfaces
|December 18, 2025
Summary
Researchers developed a novel optoelectronic device using phase-change materials (PCMs) and perovskite emitters. This innovation enables reversible control of light emission and the creation of rewritable patterns in LEDs.
Area of Science:
- Photonics and optoelectronics
- Materials science
- Device engineering
Background:
- Phase-change materials (PCMs) are crucial in photonics, optoelectronics, and electronics.
- PCMs offer tunable optical and electronic properties via phase switching.
- Integrating PCMs with light-emitting materials enhances device functionality.
Purpose of the Study:
- To develop a novel optoelectronic device integrating a perovskite emitter with a phase-change material.
- To demonstrate reversible on/off control of electroluminescence (EL) via PCM phase switching.
- To achieve pattern writing capabilities in EL devices without lithography.
Main Methods:
- Fabrication of an optoelectronic device combining a perovskite emitter and a PCM.
- Utilizing PCM phase transitions to modulate EL output.
- Employing localized phase modification for pattern generation.
Main Results:
- Demonstrated reversible on/off control of electroluminescence.
- Achieved the ability to write distinct emission patterns by locally altering PCM phase.
- Showcased pattern rewritability without the need for lithography.
Conclusions:
- The developed device offers a new pathway for fast-response LEDs.
- Enables reconfigurable and repeatedly rewritable emission patterns.
- Highlights the potential of PCM-integrated perovskite devices for advanced optoelectronics.
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