SOLAR ENERGY CONVERSION USING TEMPERATURE-CONTROLLED CARRIERS (talk)

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

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 proceeding › Conference Paper › peer-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 language	English
Title of host publication	Proceedings of the Twenty second European Photovoltaic Solar Energy Conference (22E-PVSEC)
Subtitle of host publication	Proc. on CD-ROM
Editors	G. Willecke, Heinz Ossenbrink, Peter Helm
Pages	187-191
Number of pages	5
ISBN (Electronic)	3-936338-22-1
Publication status	Published - 7 Sept 2007
Externally published	Yes
Event	22nd European Photovoltaic Solar Energy Conference 2007 (22E-PVSEC) - Milan, Italy Duration: 3 Sept 2007 → 7 Sept 2007 https://cordis.europa.eu/event/id/27506-european-photovoltaic-solar-energy-conference https://www.eupvsec.org/index.php/conference/authors-workstation?view=article&id=287&catid=31 (Evidence of Peer Review)

Conference

Conference	22nd European Photovoltaic Solar Energy Conference 2007 (22E-PVSEC)
Abbreviated title	22E-PVSEC
Country/Territory	Italy
City	Milan
Period	3/09/07 → 7/09/07
Other	The 22nd European Photovoltaic Solar Energy Conference and Exhibition will take place from 3 to 7 September in Milan, Italy. The conference will provide a platform for dialogue and information exchange on the latest developments in photovoltaic (PV) solar research and development.
Internet address	https://cordis.europa.eu/event/id/27506-european-photovoltaic-solar-energy-conference https://www.eupvsec.org/index.php/conference/authors-workstation?view=article&id=287&catid=31 (Evidence of Peer Review)

Cite this

@inproceedings{0af84774c1844a718bf9c3526291ca53,

title = "SOLAR ENERGY CONVERSION USING TEMPERATURE-CONTROLLED CARRIERS (talk)",

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",

author = "Yasuhiko Takeda and Tadashi Ito and Tomoyoshi Motohiro and Tomonori Nagashima and Dirk Koenig and Shrestha, \{Santosh K.\} and Gavin Conibeer",

year = "2007",

month = sep,

day = "7",

language = "English",

pages = "187--191",

editor = "Willecke, \{G. \} and Heinz Ossenbrink and Peter Helm",

booktitle = "Proceedings of the Twenty second European Photovoltaic Solar Energy Conference (22E-PVSEC)",

note = "22nd European Photovoltaic Solar Energy Conference 2007 (22E-PVSEC), 22E-PVSEC ; Conference date: 03-09-2007 Through 07-09-2007",

url = "https://cordis.europa.eu/event/id/27506-european-photovoltaic-solar-energy-conference, https://www.eupvsec.org/index.php/conference/authors-workstation?view=article\&id=287\&catid=31",

}

Takeda, Y, Ito, T, Motohiro, T, Nagashima, T, Koenig, D, Shrestha, SK & Conibeer, G 2007, SOLAR ENERGY CONVERSION USING TEMPERATURE-CONTROLLED CARRIERS (talk). in G Willecke, H Ossenbrink & P Helm (eds), Proceedings of the Twenty second European Photovoltaic Solar Energy Conference (22E-PVSEC): Proc. on CD-ROM., 1CO.4.6, pp. 187-191, 22nd European Photovoltaic Solar Energy Conference 2007 (22E-PVSEC), Milan, Italy, 3/09/07.

SOLAR ENERGY CONVERSION USING TEMPERATURE-CONTROLLED CARRIERS (talk). / Takeda, Yasuhiko; Ito, Tadashi; Motohiro, Tomoyoshi et al.
Proceedings of the Twenty second European Photovoltaic Solar Energy Conference (22E-PVSEC): Proc. on CD-ROM. ed. / G. Willecke; Heinz Ossenbrink; Peter Helm. 2007. p. 187-191 1CO.4.6.

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › peer-review

TY - GEN

T1 - SOLAR ENERGY CONVERSION USING TEMPERATURE-CONTROLLED CARRIERS (talk)

AU - Takeda, Yasuhiko

AU - Ito, Tadashi

AU - Motohiro, Tomoyoshi

AU - Nagashima, Tomonori

AU - Koenig, Dirk

AU - Shrestha, Santosh K.

AU - Conibeer, Gavin

PY - 2007/9/7

Y1 - 2007/9/7

N2 - 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

AB - 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

M3 - Conference Paper

SP - 187

EP - 191

BT - Proceedings of the Twenty second European Photovoltaic Solar Energy Conference (22E-PVSEC)

A2 - Willecke, G.

A2 - Ossenbrink, Heinz

A2 - Helm, Peter

T2 - 22nd European Photovoltaic Solar Energy Conference 2007 (22E-PVSEC)

Y2 - 3 September 2007 through 7 September 2007

ER -

SOLAR ENERGY CONVERSION USING TEMPERATURE-CONTROLLED CARRIERS (talk)

Abstract

Conference

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