Heterogeneous metasurface for high temperature selective emission

被引：64

作者：

Woolf, D. ^{[1
]}

Hensley, J. ^{[1
]}

Cederberg, J. G. ^{[2
]}

Bethke, D. T. ^{[2
]}

Grine, A. D. ^{[2
]}

Shaner, E. A. ^{[2
]}

机构：

[1] Phys Sci Inc, New England Business Ctr 20, Andover, MA 01810 USA

[2] Sandia Natl Labs, Albuquerque, NM 87185 USA

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 08期

基金：

美国能源部;

关键词：

THERMOPHOTOVOLTAIC ENERGY-CONVERSION; CELLS; EFFICIENCY; SURFACE; GROWTH; SINGLE;

D O I：

10.1063/1.4893742

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate selective emission from a heterogeneous metasurface that can survive repeated temperature cycling at 1300 K. Simulations, fabrication, and characterization were performed for a cross-over-a-backplane metasurface consisting of platinum and alumina layers on a sapphire substrate. The structure was stabilized for high temperature operation by an encapsulating alumina layer. The geometry was optimized for integration into a thermophotovoltaic (TPV) system, and was designed to have its emissivity matched to the external quantum efficiency spectrum of 0.6 eV InGaAs TPV material. We present spectral measurements of the metasurface that result in a predicted 22% optical-to-electrical power conversion efficiency in a simplified model at 1300 K. Furthermore, this broadly adaptable selective emitter design can be easily integrated into full-scale TPV systems. (C) 2014 AIP Publishing LLC.

引用

页数：5

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