Solar-thermophotovoltaic systems using spectrally selective absorber/emitter based on metal-dielectric multilayer

A. Kohiyama, M. Shimizu, H. Yugami

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, high-efficiency STPV systems are investigated using spectrally selective absorber/emitter consisted of metal-dielectric multilayer and a GaSb TPV cell. A solar-thermophotovoltaic (STPV) system is expected to as highefficiency solar energy conversion using single-junction photovoltaic (PV) cells. However, the reached experimental system efficiency has been still low because spectral control of emitter is not sufficient. Narrowband thermal radiation from the emitter is effective for obtaining high-efficiency STPV systems, exceeding the Shockley-Queisser limit. From theoretical analysis, the narrowband thermal emitter can leads to obtain PV conversion efficiency over 45% at Qvalue= 30 and 1300K. The spectrally selective absorber/emitter was also investigated to obtain high ηPV. The ηPV = 23.5% was estimated by the fabricated emitter spectrum, which exceeds the Shockley-Queisser limit of 19.6% for a GaSb bandgap of 0.67 eV. The entire STPV system and the power generation tests were conducted using the fabricated absorber/emitter. The total system efficiency 4.9% at 1505K was obtained under an irradiance of 109 Wcm-2.

Original languageEnglish
Title of host publicationNext Generation Technologies for Solar Energy Conversion VII
EditorsGavin Conibeer, Oleg V. Sulima
PublisherSPIE
ISBN (Electronic)9781510602656
DOIs
Publication statusPublished - 2016 Jan 1
EventNext Generation Technologies for Solar Energy Conversion VII - San Diego, United States
Duration: 2016 Aug 292016 Aug 31

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9937
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherNext Generation Technologies for Solar Energy Conversion VII
CountryUnited States
CitySan Diego
Period16/8/2916/8/31

Keywords

  • gallium antimonide
  • solar energy
  • spectral control of thermal radiation
  • thermophotovoltaic

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Kohiyama, A., Shimizu, M., & Yugami, H. (2016). Solar-thermophotovoltaic systems using spectrally selective absorber/emitter based on metal-dielectric multilayer. In G. Conibeer, & O. V. Sulima (Eds.), Next Generation Technologies for Solar Energy Conversion VII [993704] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9937). SPIE. https://doi.org/10.1117/12.2237672