Journal
OPTICS EXPRESS
Volume 28, Issue 26, Pages 38567-38578Publisher
Optica Publishing Group
DOI: 10.1364/OE.412764
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Funding
- Japan Society for the Promotion of Science (JSPS KAKENHI) [JP16H02117, JP16J02560]
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For effective photon conversion in solar-thermophotovoltaic (TPV) systems, an enclosed-space confined emitter system is proposed, and its power generation potential is demonstrated. A cuboid monolithic absorber/emitter is applied for higher extraction efficiency without dead areas. An analysis using an enclosed space shows a 4.1% higher absolute system efficiency than that using a planar absorber/emitter system. In the experiment, system efficiency reaches 7.0%, which is obtained after multiplying the power measured from one cell by five. A system efficiency more than 20% is achievable by further improvement with a back surface reflecting TPV cells and a perfectly enclosed space. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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