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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.

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

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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