Thermochromic effect with semiconducting layers
| Autor: | R. Reineke-Koch, A. Pazidis |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Thermochromism
Materials science Renewable Energy Sustainability and the Environment Infrared business.industry chemistry.chemical_element Activation energy Conductivity Surfaces Coatings and Films Electronic Optical and Magnetic Materials Optics chemistry Optoelectronics Charge carrier business Layer (electronics) Order of magnitude Titanium |
| Zdroj: | Solar Energy Materials and Solar Cells. 143:557-560 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2015.07.036 |
| Popis: | A switching of reflectivity with temperature can be achieved in the infrared region, using thermally activated charge carriers in a single semiconductive layer on a reflective base material, when the interference effect between front and back side of the layer is used. We outline, how a surprisingly small change in conductivity – of less than an order of magnitude – changes the reflectivity more than 60% when the semiconductive material is tailored to its task regarding its activation energy and charge carrier density. As a proof of principle, titanium oxynitride layers were prepared on aluminum. A change of reflectivity of 21% was achieved when the sample temperature was increased from 25 °C to 150 °C, and a change of 34% when the sample was heated to 250 °C. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect