Tailoring photonic metamaterial resonances for thermal radiation

被引：52

作者：

Bermel, Peter ^{[1
]}

Ghebrebrhan, Michael ^{[1
]}

Harradon, Michael ^{[1
]}

Yeng, Yi Xiang ^{[1
]}

Celanovic, Ivan ^{[1
]}

Joannopoulos, John D. ^{[1
]}

Soljacic, Marin ^{[1
]}

机构：

[1] MIT, Inst Soldier Nanotechnol, Cambridge, MA 02139 USA

来源：

NANOSCALE RESEARCH LETTERS | 2011年 / 6卷

基金：

美国国家科学基金会;

关键词：

metamaterials; photonic crystals; solar absorbers; THERMOPHOTOVOLTAIC SYSTEMS; GLOBAL OPTIMIZATION; SOLAR; EMITTER;

D O I：

10.1186/1556-276X-6-549

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Selective solar absorbers generally have limited effectiveness in unconcentrated sunlight, because of reradiation losses over a broad range of wavelengths and angles. However, metamaterials offer the potential to limit radiation exchange to a proscribed range of angles and wavelengths, which has the potential to dramatically boost performance. After globally optimizing one particular class of such designs, we find thermal transfer efficiencies of 78% at temperatures over 1,000 degrees C, with overall system energy conversion efficiencies of 37%, exceeding the Shockley-Quiesser efficiency limit of 31% for photovoltaic conversion under unconcentrated sunlight. This represents a 250% increase in efficiency and 94% decrease in selective emitter area compared to a standard, angular-insensitive selective absorber.

引用

页码：1 / 5

页数：5

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