SOLAR ENERGY CONVERSION USING TEMPERATURE-CONTROLLED CARRIERS (talk)

Yasuhiko Takeda*, Tadashi Ito, Tomoyoshi Motohiro, Tomonori Nagashima, Dirk Koenig, Santosh K. Shrestha, Gavin Conibeer

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We have theoretically investigated the characteristics of hot carrier solar cell operation in detail. We have found that among the two channels of energy loss of photo-generated carriers: emission from the hot absorber and entropy increase caused by the energy flow from the hot absorber to the cold outside, the former is negligible and the latter restricts the conversion efficiency under a practical condition of carrier thermalization time of 1 ns. To suppress the entropy increase for higher conversion efficiency, a smaller effective mass of photo-excited electrons is needed, as well as more intense irradiation and a higher carrier temperature. When photo-excited holes are completely thermalized whereas electrons are still hot, the entropy increase is significantly suppressed. In consequence, the conversion efficiency is improved compared to the values for hot electrons and hot holes, despite more remarkable energy dissipation from the holes to phonons, when the effective mass of electrons is much smaller than that of holes.
Keywords: Hot carriers, Modeling, Fundamentals
Original languageEnglish
Title of host publicationProceedings of the Twenty second European Photovoltaic Solar Energy Conference (22E-PVSEC)
Subtitle of host publicationProc. on CD-ROM
EditorsG. Willecke, Heinz Ossenbrink, Peter Helm
Pages187-191
Number of pages5
ISBN (Electronic)3-936338-22-1
Publication statusPublished - 7 Sept 2007
Externally publishedYes
Event22nd European Photovoltaic Solar Energy Conference 2007 - Milan, Italy
Duration: 3 Sept 20077 Sept 2007
https://www.eupvsec.org/index.php/conference/authors-workstation?view=article&id=287&catid=31 (Evidence of Peer Review)

Conference

Conference22nd European Photovoltaic Solar Energy Conference 2007
Abbreviated title22E-PVSEC
Country/TerritoryItaly
CityMilan
Period3/09/077/09/07
Internet address

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