Friesen, Gabi and Ossenbrink, H.A.
(1997)
Capacitance effects in high-efficiency cells.
Abstract
Frequently transient measurement techniques lead to capacitance effects which complicate the accurate measurement of the performance of high efficiency solar cells. The photo-current-response measurement (PCR), developed at ESTI, offers a tool for the investigation of these capacitance effects. This paper describes the theory of capacitance effects and the diffusion capacitance as experimental results achieved by the PCR-method. The theory shows that the diffusion capacitance is strongly dependent on the minority carrier diffusion length and lifetime. In the future the PCR-method could be used for the determination of this solar cell parameter. We show, using monochromatic light pulses, that the induced diffusion capacitance charge (Q diff ) is exponentially dependent on the bias voltage and linearly dependent on the light intensity. Finally, the capacitance effect is made clearly visible by the generation of the current-voltage characteristic from PCR-measurements.
| Item Type: | Scientific journal article, Newspaper article or Magazine article |
|---|---|
| Uncontrolled Keywords: | Capacitance,High-efficiency cells |
| Subjects: | Engineering > Electronic & electrical engineering > Electrical power > Electrical power generation |
| Department/unit: | Dipartimento ambiente costruzioni e design > Istituto sostenibilità applicata all'ambiente costruito |
| Depositing User: | Gabi Friesen |
| Date Deposited: | 27 Aug 2018 06:00 |
| Last Modified: | 27 Aug 2018 06:00 |
| URI: | http://repository.supsi.ch/id/eprint/9713 |
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