Meyer Burger Technology has patented a method for measuring current-voltage curves and current mismatches in tandem solar cells. The method utilizes a combination of broad-spectral and narrow-band light sources under standard AM1.5 conditions, ensuring accurate testing results for solar cell performance. GlobalData’s report on Meyer Burger Technology gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Meyer Burger Technology, was a key innovation area identified from patents. Meyer Burger Technology's grant share as of June 2024 was 26%. Grant share is based on the ratio of number of grants to total number of patents.
Method for testing tandem solar cell current-voltage characteristics
The patent US12040746B2 outlines a method for measuring and calculating the current-voltage (IV) curve and current mismatch in tandem solar cells, which consist of at least two solar subcells. The method is conducted under simulated solar irradiance conditions defined by the AM1.5 illumination standard (IEC 60904-3). Key steps include using a primary light source that mimics the AM1.5 spectrum, alongside narrow bandwidth light sources that target specific subcells. The process involves illuminating the tandem solar cell to acquire short-circuit current data, performing interpolations to define balance ratios of the junction currents, and calculating the short-circuit current at the intersection of these interpolations. The method also allows for adjustments in light intensity to ensure consistent test results across different light source configurations.
Additionally, the patent describes a solar cell test apparatus designed to implement this method. The apparatus includes a primary light source, such as a filtered Xenon flash lamp, and multiple narrow bandwidth light sources, potentially including light-emitting diodes (LEDs). The system is equipped with monitoring devices to measure light intensity, ensuring accurate readings during testing. The method is designed for efficiency, allowing for the characterization of tandem solar cells in under one minute, and can also calculate various solar cell parameters, including short-circuit current, open-circuit voltage, and fill factor. This innovative approach aims to enhance the testing and performance evaluation of tandem solar cells in a controlled and standardized manner.
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