Design of selective coatings for solar thermal applications using sub-wavelength metal-dielectric structures

Nicholas P. Sergeant; Mukul Agrawal; Peter Peumans

doi:10.1117/12.826803

20 August 2009 Design of selective coatings for solar thermal applications using sub-wavelength metal-dielectric structures

Nicholas P. Sergeant, Mukul Agrawal, Peter Peumans

Author Affiliations +

Proceedings Volume 7410, Optical Modeling and Measurements for Solar Energy Systems III; 74100C (2009) https://doi.org/10.1117/12.826803
Event: SPIE Solar Energy + Technology, 2009, San Diego, California, United States

Abstract

Spectral control of the emissivity of surfaces is essential in applications such as solar thermal energy and thermophotovoltaic energy conversion in order to achieve the highest conversion efficiencies possible. We investigated surfaces consisting of periodic, nanoscale V-grooves coated with aperiodic metal-dielectric stacks. This approach combines impedance matching using tapered metallic features with the excellent spectral selectivity of aperiodic metal-dielectric stacks. We explain how changes in the angle of the V-grooves can be used to tailor the spectral selectivity over a wide angular range to significantly increase the efficiency of thermophotovoltaic and solar thermal systems. Optimal coatings for concentrated solar power are predicted to have thermal emissivity below 5% at 450°C while absorbing >90% of the incident light.

Citation Download Citation

Nicholas P. Sergeant, Mukul Agrawal, and Peter Peumans "Design of selective coatings for solar thermal applications using sub-wavelength metal-dielectric structures", Proc. SPIE 7410, Optical Modeling and Measurements for Solar Energy Systems III, 74100C (20 August 2009); https://doi.org/10.1117/12.826803

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available