at Google ScholarTitle data
Lam, Jefferson A. S. ; Matsumori, Kishin ; Theis, Maximilian ; Berger, Alexander ; Böller, Nicole ; Song, Qimeng ; Gresil, Matthieu ; Jasieniak, Jacek J. ; Retsch, Markus:
Morphology‐Controlled Silica Nanoparticle Coatings for Transparent Radiative Cooling.
In: Advanced Materials Interfaces.
(7 May 2026)
.
- e01095.
ISSN 2196-7350
DOI: https://doi.org/10.1002/admi.202501095
Project information
| Project title: |
Project's official title Project's id GRK 2818: Optische Anregungen in organischen und anorganischen Halbleitern: Verstehen und Kontrollieren durch externe Stimuli 464648186 |
|---|---|
| Project financing: |
Deutsche Forschungsgemeinschaft |
Abstract in another language
In this study, transparent passive radiative cooling coatings are introduced by immobilizing solid and hollow silica (SiO2) spheres on glass substrates. It is showcased that particle morphology within a sub-monolayer coating strongly influences visible and atmospheric window reflectance of glass. Solid and hollow-sphere particles of total diameter within the Mie regime reduce atmospheric window reflectance (RAW) at the expense of higher visible reflectance (RVIS). This trade-off is dependent on particle and core diameter. Solid particles with particle diameter >1000 nm can reduce the RAW of glass by up to 65 %, though increase RVIS by 25 %. Meanwhile, the use of hollow-sphere nanoparticles of similar diameters and thin shells (25–50 nm) can reduce the RAW of glass by up to 35 % with minimal changes to RVIS. These spectroscopic trends are validated numerically via both Mie theory and effective medium theory. The work demonstrates that hollow-sphere morphology is a valuable lever to control passive radiative cooling for various solar applications requiring transparency, such as coatings for windows or photovoltaic devices.