Electroluminescence test to investigate the humidity effect on solar cells operation
Authors: Fontani D., Sansoni P., Francini F., Messeri M., Pierucci G., DeLucia M., Jafrancesco D.
Autors Affiliation: CNR-INO National Institute of Optics, Largo E. Fermi, 50125 6—Firenze, Italy; Department DIEF, University of Florence, Via Santa Marta, 50139 3—Firenze, Italy
Abstract: The electroluminescence test is an experiment typically used to verify the behavior of the photovoltaic cell and to qualitatively check its integrity. It works by operating the photovoltaic cell as a diode polarized directly: the cells that light up in a module indicate how many of them work. This test provides an estimate of the maximum performance of the entire photovoltaic module. A qualitative inspection was performed by electroluminescence tests on 48 modules of photovoltaic cells. They had already been installed on a small-size concentration solar plant before the test and some modules had reached a lower level of performance than expected. A first electroluminescence test was performed, which showed that only 61.5% of the photocells worked. Since there were visible signs of humidity within the various modules, some of the inoperative modules underwent a dehumidification treatment in a climatic chamber. A second electroluminescence test showed that the percentage of functioning cells had increased to 66.3% after the drying treatment.
Volume: 11(10) Pages from: 2659-1 to: 2659-15
KeyWords: Atmospheric humidity; Electroluminescence; Humidity control; Photoelectrochemical cells; Photovoltaic cells; Solar cells; Testing, Climatic chamber; Drying treatment; Electroluminescence test; Humidity effects; Photovoltaic; Photovoltaic modules; Solar plant, Photovoltaic effectsDOI: 10.3390/en11102659Connecting to view paper tab on IsiWeb: Click here