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VISIRday SIGNED

VISible to far-IR optical tuning: passive DAYtime cooling by hierarchical structures and hybrid materials

Total Cost €

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EC-Contrib. €

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Partnership

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 VISIRday project word cloud

Explore the words cloud of the VISIRday project. It provides you a very rough idea of what is the project "VISIRday" about.

optimum    minimized    understand    sky    outer    cooling    reflection    white    supporting    complement    beetles    assembly    thermal    urgently    rules    technologies    visirday    micro    externally    efficient    concomitantly    combination    off    structured    energy    13    emit    radiance    window    nature    adjustable    structures    consumption    material    radically    materials    class    fibres    self    stringent    entire    holistic    nano    insights    simulations    building    conceive    wavelengths    examples    influx    block    mid    adjusted    offers    am    radiative    combine    team    nm    green    tuneable    inspired    ground    ir    removed    push    hierarchically    breaking    chance    mesoparticles    hybrid    convinced    add    experimental    reflective    polymers    cold    ant    atmosphere    direct    optical    paints    saharan    polariton    fundamental    device    metallic    finely    surface    scattering    nanostructures    solar    space    emissive    engine    provides    transparent    intricate    spectral    lithography    mix    heat    daytime    write    lower    silver    mesostructured    finite    phonon    radiatively    300    counteract    absorption    load    colloidal   

Project "VISIRday" data sheet

The following table provides information about the project.

Coordinator
UNIVERSITAT BAYREUTH 

Organization address
address: UNIVERSITATSSTRASSE 30
city: BAYREUTH
postcode: 95447
website: www.uni-bayreuth.de

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Germany [DE]
 Project website http://www.retsch.uni-bayreuth.de/en/research/06_erc/index.html
 Total cost 1˙487˙636 €
 EC max contribution 1˙487˙636 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-STG
 Funding Scheme ERC-STG
 Starting year 2017
 Duration (year-month-day) from 2017-03-01   to  2022-02-28

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITAT BAYREUTH DE (BAYREUTH) coordinator 1˙487˙636.00

Map

 Project objective

Efficient daytime cooling without the need for a heat engine is an essential technology to lower our overall energy consumption. Nature offers a chance to off-load heat directly into the cold outer space via the so-called “sky window”: a spectral range from 8 – 13 µm, where our atmosphere is transparent. Concomitantly, solar radiance influx needs to be minimized by scattering and reflection, which would counteract the radiatively removed energy. VISIRday aims to provide ground-breaking new materials and concepts to emit thermal energy directly into this transparent sky window. A radically holistic approach is necessary to understand and design the optical properties of nano- and mesostructured materials over the entire spectral range (300 nm – 20 µm), with the mid-IR sky window being fully emissive, and all other spectral wavelengths being fully reflective. I will therefore combine top-down direct write lithography with intricate bottom-up colloidal self-assembly to device hierarchically structured systems fully addressing these stringent optical properties. A new material class – surface phonon polariton supporting nano- and mesoparticles – with adjustable absorption properties in the mid-IR range, will take a leading role as novel colloidal building block. In combination with polymers and metallic nanostructures my team will demonstrate hybrid structures with finely adjusted and even externally tuneable optical properties. Simulations based on finite element modelling to conceive optimum design rules will complement the experimental work. Inspired by examples from nature, namely white beetles and the Saharan silver ant, I will push the fundamental insights towards novel technologies such as radiative daytime cooling paints and fibres. I am convinced that this project provides the urgently needed materials and concepts to add radiative daytime cooling to the existing mix of green energy technologies.

 Publications

year authors and title journal last update
List of publications.
2019 Philipp, A., Pech-May, N. W., Kopera, B. A. F., Lechner, A. M., Rosenfeldt, S., Retsch, M.
Direct Measurement of the In-Plane Thermal Diffusivity of Semitransparent Thin Films by Lock-In Thermography: An Extension of the Slopes Method
published pages: 8476-8483, ISSN: 0003-2700, DOI: 10.1021/acs.analchem.9b01583
Analytical Chemistry 91, 13 2020-02-27

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