Extraction of Saturation Current and Ideality Factor from Measuring Voc and Isc of Photovoltaic Modules
Author
Source
International Journal of Photoenergy
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-12-19
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Saturation current (I0) and ideality factor (n) of a p-n junction solar cell are an indication of the quality of the cell.
These two parameters are usually estimated from dark current-voltage measurements.
In this study, a quick and easy method to determine these two parameters by measuring open-circuit, Voc, and short-circuit current, Isc, is presented.
Solar cell designers can use this method as a grading or diagnostic tool to evaluate degradation in photovoltaic (PV) modules.
In order to verify the Voc-Isc method, a series of experiments have been conducted on a single cell and a 36-cell module.
Good agreement between our Voc-Isc method and dark I-V measurements was obtained.
An application of the method on the performance degradation of a single-junction a-Si:H module revealed that the module’s I0 increased by more than three orders of magnitude and n increased by 65% after an outdoor exposure of 130 kWh/m2.
This increase in n indicates that after exposure, the recombination current in the cells’ space charge region increased due to the light-induced formation of metastable defects.
The method is also used to assess the quality of five PV module technologies and proved to be reliable despite defective cells in a module.
American Psychological Association (APA)
Meyer, E. L.. 2017. Extraction of Saturation Current and Ideality Factor from Measuring Voc and Isc of Photovoltaic Modules. International Journal of Photoenergy،Vol. 2017, no. 2017, pp.1-9.
https://search.emarefa.net/detail/BIM-1168489
Modern Language Association (MLA)
Meyer, E. L.. Extraction of Saturation Current and Ideality Factor from Measuring Voc and Isc of Photovoltaic Modules. International Journal of Photoenergy No. 2017 (2017), pp.1-9.
https://search.emarefa.net/detail/BIM-1168489
American Medical Association (AMA)
Meyer, E. L.. Extraction of Saturation Current and Ideality Factor from Measuring Voc and Isc of Photovoltaic Modules. International Journal of Photoenergy. 2017. Vol. 2017, no. 2017, pp.1-9.
https://search.emarefa.net/detail/BIM-1168489
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1168489