Effective photon recycling in solar thermophotovoltaics using a confined cuboid emitter

Asaka Kohiyama, Makoto Shimizu, Kana Konno, Tomoya Furuhashi, Hiroo Yugami

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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.

Original languageEnglish
JournalOptics Express
Issue number26
Publication statusPublished - 2020 Dec 21

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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