Method and apparatus for measuring solar cells

• Main Author: SUTHUES JORN
• Format: Patent
• Language: English
• Published: 21.10.2015
• Subjects: BASIC ELECTRIC ELEMENTS; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-REDRADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, E.G. USINGPHOTOVOLTAIC [PV] MODULES; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SEMICONDUCTOR DEVICES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a method and apparatus for measuring solar cells. The invention relates to the method (120) of measuring solar cells, wherein a voltage (U) or a current (I) is applied to a solar cell (14), and a current (I) and voltage (U), respectively, resulting therefrom is measured, and wherein prior to applying the voltage (U) or current (I) and during or after measuring the resulting current (I) and resulting voltage (U), respectively, a relative distribution of radiation emitted across the solar cell surface area (22) is measured, wherein the voltage (U) or current (I) is applied as at least one pulse (78) with a predeterminable, constant value for a predeterminable period of time, wherein an energy value is calculated from the resulting current (I) and resulting voltage (U), respectively, wherein a first relative distribution (79) of radiation emitted across the solar cell surface area (22) is measured prior to the pulse or each pulse (78); and a second relative distribution (83) of radiation emitted across the solar cell surface area (22) is measured during or after the pulse or each pulse (78), and wherein a difference distribution (86) is generated from the first and second relative distributions (79, 83) and scaled to the calculated energy value. It also relates to an apparatus (10, 40) for performing the method. The method (120) and the apparatus (10, 40) serve for the improved sorting of solar cells.