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Multifunctional Daytime Radiative Cooling Devices with Simultaneous Light-Emitting and Radiative Cooling Functional
Sanghyun Jeon1, Soomin Son1, Sang Yeop Lee1
1Department of Materials Science and Engineering, Korea University, 145, Anam-ro Seongbuk-gu, Seoul 02841, Republic of Korea.
ACS Applied Materials & Interfaces
|November 30, 2020
Summary
New light-emitting and passive radiative cooling (LEPC) materials combine perovskite nanocrystals with polymer layers for efficient cooling. These multifunctional devices offer practical applications in smart buildings and displays.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Passive radiative cooling materials offer a sustainable alternative to conventional cooling technologies.
- Integrating light-emitting properties with cooling functionalities presents an opportunity for multifunctional devices.
Purpose of the Study:
- To design and fabricate multifunctional light-emitting and passive radiative cooling (LEPC) materials and devices.
- To enhance the stability and cooling efficiency of perovskite nanocrystals (NCs) for integration into radiative polymer layers.
Main Methods:
- Embedding chemically designed, silica-coated lead halide perovskite nanocrystals (NCs) into radiative polymer layers.
- Utilizing surface passivation techniques to improve NC stability and compatibility with the polymer matrix.
- Fabricating LEPC devices through techniques like pixelating, assembling, cutting, and drawing.
Main Results:
- The fabricated LEPC devices demonstrated superior cooling performance compared to conventional cooling devices, validated by outdoor experiments and simulations.
- Silica coating of perovskite NCs improved both chemical stability and cooling efficiency.
- LEPC materials exhibited ease of patterning, enabling versatile device fabrication.
Conclusions:
- Multifunctional LEPC materials based on perovskite NCs offer a promising solution for advanced cooling applications.
- The developed materials and devices are practical for integration into smart building systems, smart window displays, and anticounterfeiting cooling systems.
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