Contactless Extraction of Implied I-V Curves of Individual Solar Cells in Fully Assembled Modules Using Photoluminescence
| Autor: | Raghavi Bhoopathy, Thorsten Trupke, Ziv Hameiri, Robert Dumbrell, Oliver Kunz |
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| Rok vydání: | 2018 |
| Předmět: |
Cell specific
Photoluminescence Materials science business.industry Extraction (chemistry) Photovoltaic system 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Suns in alchemy 01 natural sciences 0104 chemical sciences Degradation (geology) Power output 0210 nano-technology Biological system business Solar power |
| Zdroj: | 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC). |
| Popis: | Degradation of photovoltaic modules is one of the key aspects determining the power output and thus the financial viability of solar power plants. Furthermore, it is known that individual cells in PV modules degrade at different rates. The specific cell’s degradation rate depends on many factors and generally exhibits an injection dependent nature. Thus, a currentvoltage measurement of a specificcell can provide valuable information to determine the extent of degradation and identify the prevalent degradation mechanism. Although various inspection methods can be used to identify degraded cells, so far none of them provide the ability to extract the current-voltage characteristics of an underperforming cell by a contactless and non-destructive method. In this study, we present a photoluminescence based, contactless, fast, simple, and highly sensitive method to obtain the implied current-voltage curve of individual cells already embedded in solar modules. The method is validated by comparisons with Suns-V oc measurements. |
| Databáze: | OpenAIRE |
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