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Development of Characterization and Aging Methods

The key challenge for the industrial scaling of perovskite solar cells lies in long-term stability: How can a solar module manufacturer know whether its product will remain stable for 30 years in all kinds of weather—without having to wait decades for measurement results? To solve this problem, we are developing measurement setups and methods for accelerated, high-throughput aging.  To this end, we have developed the world’s most cost-effective measurement electronics for solar cells, enabling us to measure and age many hundreds of solar cells simultaneously. We will now combine these methods with other measurement techniques, in particular photoluminescence imaging and time-resolved optoelectronic methods. By combining these approaches, we aim to achieve automated in-operando characterization during aging. The large measurement datasets must then be evaluated using AI and linked back to physical models based on drift-diffusion semiconductor simulations. This will provide us with a comprehensive understanding of the degradation processes in perovskite solar cells, from which we can then derive potential solutions for solar cell optimization. 

Recommended Publications

• Wagner et al. „Revealing fundamentals of charge extraction in photovoltaic devices through potentiostatic photoluminescence imaging ”. Matter (2022)
• Suo, Wagner et al. Multifunctional sulfonium based treatment for perovskite solar cells with less than 1% efficiency loss over 4,500 h operational stability tests “. Nature Energy (2024)