Comparative study of Si and Ge nanoparticles with exotic core phases for solar energy conversion

S. Wippermann, M. Voros, A. Gali, G. Galli, G. Zimanyi

Research output: Conference contribution

Abstract

Third generation photovoltaic cells promise to overcome the Schockley-Quessier limit of solar cell energy conversion. In the Multiple Exciton Generation (MEG) pathway quantum confined highly energetic electron-hole pairs relax by emitting additional electron-hole pairs. The overall utility of this process is undermined, however, by the very fact that quantum confinement pushes the gap of nanoparticles (NPs) out of the solar spectrum. Here we propose that Si and Ge NPs with core structures made out of exotic high-pressure phases of bulk Si and Ge have lower gaps, more intense absorption and higher MEG rates than those of made out of the cubic diamond phase. Some of these exotic phases have already been proven to exist in colloidal NPs or on laser treated surfaces, therefore, our findings may open the door for promising solar applications of such exotic nanoparticle systems.

Original languageEnglish
Title of host publicationConference Record of the IEEE Photovoltaic Specialists Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages989-992
Number of pages4
ISBN (Print)9781479932993
DOIs
Publication statusPublished - 2013
Event39th IEEE Photovoltaic Specialists Conference, PVSC 2013 - Tampa, FL, United States
Duration: jún. 16 2013jún. 21 2013

Other

Other39th IEEE Photovoltaic Specialists Conference, PVSC 2013
CountryUnited States
CityTampa, FL
Period6/16/136/21/13

Fingerprint

Energy conversion
Solar energy
Nanoparticles
Excitons
Quantum confinement
Electrons
Photovoltaic cells
Diamonds
Solar cells
Lasers

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering

Cite this

Wippermann, S., Voros, M., Gali, A., Galli, G., & Zimanyi, G. (2013). Comparative study of Si and Ge nanoparticles with exotic core phases for solar energy conversion. In Conference Record of the IEEE Photovoltaic Specialists Conference (pp. 989-992). [6744307] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2013.6744307

Comparative study of Si and Ge nanoparticles with exotic core phases for solar energy conversion. / Wippermann, S.; Voros, M.; Gali, A.; Galli, G.; Zimanyi, G.

Conference Record of the IEEE Photovoltaic Specialists Conference. Institute of Electrical and Electronics Engineers Inc., 2013. p. 989-992 6744307.

Research output: Conference contribution

Wippermann, S, Voros, M, Gali, A, Galli, G & Zimanyi, G 2013, Comparative study of Si and Ge nanoparticles with exotic core phases for solar energy conversion. in Conference Record of the IEEE Photovoltaic Specialists Conference., 6744307, Institute of Electrical and Electronics Engineers Inc., pp. 989-992, 39th IEEE Photovoltaic Specialists Conference, PVSC 2013, Tampa, FL, United States, 6/16/13. https://doi.org/10.1109/PVSC.2013.6744307
Wippermann S, Voros M, Gali A, Galli G, Zimanyi G. Comparative study of Si and Ge nanoparticles with exotic core phases for solar energy conversion. In Conference Record of the IEEE Photovoltaic Specialists Conference. Institute of Electrical and Electronics Engineers Inc. 2013. p. 989-992. 6744307 https://doi.org/10.1109/PVSC.2013.6744307
Wippermann, S. ; Voros, M. ; Gali, A. ; Galli, G. ; Zimanyi, G. / Comparative study of Si and Ge nanoparticles with exotic core phases for solar energy conversion. Conference Record of the IEEE Photovoltaic Specialists Conference. Institute of Electrical and Electronics Engineers Inc., 2013. pp. 989-992
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