Microstructured flexible polymer films with embedded phosphor for multifunctional passive radiative cooling

• DOI: 10.1088/2040-8986/ad6e9d
• Publication Date: 2024-08-13T22:50:50Z
• Authors: Yangyang Wu; Yufu Zhu; Feng Nan; Baolu Fan; Yi Lin; Qianwen Zhang; Yalin Ma; Lei Zhou
• Keywords: Radiative Cooling

Abstract Passive daytime radiative cooling schemes are of much interest because their attractive potential to reduce energy consumption. However, the structural conditions for designing and fabricating efficient cooler limit optical diversity hinder practical utilization ( e.g. light-emitting panels, smart window systems, signboards, or anticounterfeiting). Here, multifunctional passive films demonstrated by simultaneously implementing speckle image holography disordered microstructures phosphor particles into polymer layer. The as-obtained film exhibits high total reflectivity in sunlight region (∼89%) strong infrared emissivity (∼91%) within atmospheric band (8–13 μ m), thus achieving subambient ∼4.1 °C under direct a nonvacuum setup. Interestingly, can be acted as violet blue illumination also easily patterned drawing, cutting pixelating. structured here utilized UV resistance, displays, anticounterfeiting roofing materials certain aesthetic purposes.