Energy Balance Analysis of Photovoltaic Cells by Voltage-Dependent Modulation Photocalorimetry

David Cahen; Bettine Büchner; Franco Decker; Martin Wolf

doi:10.1109/16.46388

Energy Balance Analysis of Photovoltaic Cells by Voltage-Dependent Modulation Photocalorimetry

David Cahen
, Bettine Büchner
, Franco Decker
, Martin Wolf

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

We describe the use of photothermal signals, obtained from a photovoltaic cell subjected to periodic excitation, as a function of applied electrical potential, and of a simple geometrical construction, based on a plot of these, to analyze the use of photon energy by the cell. The method is illustrated using examples obtained by a variety of experimental thermal detection schemes with c-Si, a-Si, and GaAs solid-state cells, as well as with liquid-junction (photoelectrochemical) cells, taking into account complications that arise if only part of the solar cell surface is illuminated, if only part of the thermal energy flux emanating from the cell's surface is detected, or if quantum efficiencies for current collection differ substantially from unity. Keywords—Photovoltaic, radiometry, beam deflection, calorimetry.

Original language	English
Pages (from-to)	498-508
Number of pages	11
Journal	IEEE Transactions on Electron Devices
Volume	37
Issue number	2
DOIs	https://doi.org/10.1109/16.46388
State	Published - Feb 1990
Externally published	Yes

Funding

Manuscript received April 30, 1989. The portion of this work performed at the Weizmann Institute of Science was supported in part by the Israel Ministry of Energy and Infrastructure and the Belfer Center for Energy Research. D. Cahen and B. Buchner are with the Department of Structural Chemistry and the Center for Energy Research, The Weizmann Institute of Sci- ence, Rehovot 76100, Israel. F. Decker is with the Institute of Physics, UNICAMP, Campinas, SP, Brad. M. Wolf is with the Department of Electrical Engineering, University of Pennsylvania, Philadelphia, PA 19104. IEEE Log Number 8932894.

Funders
Belfer Center for Energy Research
Israel Ministry of Energy and Infrastructure

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This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

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10.1109/16.46388

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AB - We describe the use of photothermal signals, obtained from a photovoltaic cell subjected to periodic excitation, as a function of applied electrical potential, and of a simple geometrical construction, based on a plot of these, to analyze the use of photon energy by the cell. The method is illustrated using examples obtained by a variety of experimental thermal detection schemes with c-Si, a-Si, and GaAs solid-state cells, as well as with liquid-junction (photoelectrochemical) cells, taking into account complications that arise if only part of the solar cell surface is illuminated, if only part of the thermal energy flux emanating from the cell's surface is detected, or if quantum efficiencies for current collection differ substantially from unity. Keywords—Photovoltaic, radiometry, beam deflection, calorimetry.

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Energy Balance Analysis of Photovoltaic Cells by Voltage-Dependent Modulation Photocalorimetry

Abstract

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