Vasilopoulou, Mariada Silva, Wilson JoseSoultati, AnastasiaKim, Hyeong PilKim, Byung SoonReo, YoujinGavim, Anderson Emanuel XimimConforto, JulioSchneider, Fabio KurtFelippi, MarcielePalilis, Leonidas C.Davazoglou, DimitrisArgitis, PanagiotisStergiopoulos, ThomasFakharuddin, AzharJang, JinGasparini, NicolaNazeeruddin, Mohammad KhajaNoh, Yong-YoungYusoff, Abd. Rashid bin Mohd2022-12-052022-12-052022-12-052022-09-2110.1016/j.xcrp.2022.101019https://infoscience.epfl.ch/handle/20.500.14299/193041WOS:000884465600010Here, we report photonic nanostructures replicated from the adaxial epidermis of flower petals onto light-polymerized coatings using low-cost nanoimprint lithography at ambient temperature. These multifunctional nanocoatings are applied to confer enhanced light trapping, water repellence, and UV light and environmental moisture protection features in perovskite solar cells. The former feature helps attain a maximum power conversion efficiency of 24.61% (21.01% for the reference cell) without any additional de-vice optimization. Added to these merits, the nanocoatings also enable stable operation under AM 1.5G and UV light continuous illumination or in real-world conditions. Our engineering approach provides a simple way to produce multifunctional nanocoatings optimized by nature's wisdom.Chemistry, MultidisciplinaryEnergy & FuelsMaterials Science, MultidisciplinaryPhysics, MultidisciplinaryChemistryMaterials SciencePhysicsbroad-bandhalide perovskitesrefractive-indexlightefficiencyfilmsenhancementsurfacesopticsflowertext::journal::journal article::research article