Spectrally Engineered Coatings for Steering the Solar Photons

Détails bibliographiques
Publié dans:	Advanced materials (Deerfield Beach, Fla.). - 1998. - (2025) vom: 26. Apr., Seite e2502542
Auteur principal:	Gong, Quan (Auteur)
Autres auteurs:	Chen, Jianheng, Zhang, Yijie, Lu, Lin
Format:	Article en ligne
Langue:	English
Publié:	2025
Accès à la collection:	Advanced materials (Deerfield Beach, Fla.)
Sujets:	Journal Article bifacial photovoltaic building energy carbon neutral cities photoluminescence radiative cooling coating

Description
Résumé:	© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH. The spectral properties of radiative cooling (RC) and photovoltaic (PV) govern their capacity to utilize solar photons at distinct energy levels. However, spectral mismatches with the solar spectrum result in significant inefficiencies: non-photovoltaic heat losses in PV panels and wasted energy from reflected solar radiation in RC systems. To address this, a photoluminescent RC coating with spectrally selective reflectivity is developed to be integrated it with bifacial photovoltaic (biPV) panels. The high reflectivity of the RC coating directs photons to the rear side of the PV panels, while its spectral selectivity optimizes the energy distribution of photons reaching the rear side, resulting in a 32% increase in the overall power output of the bifacial PV system. Additionally, the incorporation of photoluminescent materials enables the conversion of absorbed photons into luminescence rather than heat by suppressing non-radiative transitions. This reduces effective solar absorption by 14% and enhances radiative cooling performance. Simulated urban rooftop deployment demonstrates that this dual-harvesting system meet ≈18.1% of Hong Kong's annual electricity demand, offering a scalable pathway toward carbon-neutral cities
Description:	Date Revised 26.04.2025 published: Print-Electronic Citation Status Publisher
ISSN:	1521-4095
DOI:	10.1002/adma.202502542