Carbon Nanotube-based Tandem Absorber with Tunable Spectral Selectivity: Transition from Near-perfect Blackbody Absorber to Solar Selective Absorber

Overview

Journal Adv Mater

Date 2014 Jan 30

PMID 24474148

Citations 8

Authors

N Selvakumar

S B Krupanidhi

Harish C Barshilia

Affiliations

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Abstract

CVD grown CNT thin film with a thickness greater than 10 μm behaves like a near-perfect blackbody absorber (i.e., α/ε = 0.99/0.99). Whereas, for a thickness ≤ 0.4 µm, the CNT based tandem absorber acts as a spectrally selective coating (i.e., α/ε = 0.95/0.20). These selective coatings exhibit thermal stability up to 650 °C in vacuum, which can be used for solar thermal power generation.

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