Abstract
To facilitate optical design of energy-efficient materials and devices, a detailed knowledge of their basic optical parameters is necessary. In this paper we present a novel method for determining scattering (S) and absorption (K) coefficients from total transmittance and reflectance measurements by inversion of the Kubelka-Munk theory. The reflectance parameters appearing in this theory depend on the angular distribution of scattered light inside the material. The versatility of our method is demonstrated by a reanalysis of experimental data for several materials of interest in energy-related applications. Specifically, we report spectra of S and K for: (a) pigmented polymer foils for radiative cooling applications; (b) suspended particle devices for smart windows; (c) solar reflecting TiO2-pigmented paints and (d) selective solar absorbing paints for solar collectors.
| Original language | English |
|---|---|
| Pages (from-to) | 2474-2480 |
| Number of pages | 7 |
| Journal | Materials Today: Proceedings |
| Volume | 33 |
| DOIs | |
| State | Published - 2019 |
| Event | 2019 Fall Meeting Metal Oxide- and Oxyhydride-based Nanomaterials for Energy and Environment-related Applications, EMRS 2019 - Warsaw, Poland Duration: 16 Sep 2019 → 19 Sep 2019 |
Bibliographical note
Funding Information:This work was supported by the Swedish Research Council grant 2016-03713 . We thank Cricursa S. A. for supplying SPD devices and Peter Greenwood for supplying the TiO 2 paints. We also acknowledge Tuquabo Tesfamichael and Torbjörn Nilsson for part of the reanalyzed experimental data.
Publisher Copyright:
© 2019 Elsevier Ltd. All rights reserved.
Keywords
- Absorption coefficient
- Kubelka-Munk theory
- Light scattering
- Paint
- Pigmented polymer
- Scattering coefficient
- Suspended particle device