The Role of Photonics: World-Record Perovskite/ Silicon Tandem Solar Cells

Hosted By: Optics for Energy Technical Group

6 July 2022, 9:00 - 10:00 - Eastern Daylight Time (UTC - 04:00)

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Switching humankind's energy supply to carbon-free technologies is one of the most pressing challenges. Photovoltaic solar energy is amongst the most promising technologies to provide cheap and sustainable electricity. Most solar cells are crystalline silicon solar cells, a mature technology with little room for further improvement. Tandem solar cells, where solar cells with different bandgaps are stacked on top of each other, use the solar spectrum more effectively and therefore allow for higher power conversion efficiencies. In recent years, solar cells based on metal halide perovskites moved into the focus of research, because of their excellent optoelectronic properties. They proved to be an ideal partner for silicon solar cells in perovskite/silicon tandem solar cells (PSTSC). Recently, Helmholtz-Zentrum Berlin reached 29.8% efficiency with this approach, which is the current world record as of May 2022. In this webinar, Klaus Jäger will first motivate the importance of solar energy. Then, he will discuss the effects that limit the efficiency of silicon solar cells and introduce the concept of multi-junction solar cells. Next, he will review several innovations that helped push perovskite/silicon solar cells to the current state of the art. In the webinar, he will focus on the role of photonics in this development. He will look at different experimental approaches to nanotexture PSTSC and discuss how optical simulations helped improve PSTSC.

Subject Matter Level: Intermediate - Assumes basic knowledge of the topic

What You Will Learn:
• The role of photonics in designing.
• The webinar will take us through to one of the most interesting current topics for the Solar cell community.

Who Should Attend:
• Academicians, Industry Professionals. Scientists and Research Scholars interested in the field of Solar Cells.
• Beginners who wish to understand the current scenario of the field and learn about the research areas that are open for them.


About the Presentor: Klaus Jäger, Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany

Klaus Jäger has been working as scientist at Helmholtz-Zentrum Berlin (HZB) since 2015; currently he is deputy head of the Department Optics for Solar Energy as well as director of the Joint Lab BerOSE between HZB, Zuse Institute Berlin and Freie Universität Berlin. After completing his PhD program at the Technical University (TU) Delft in the Netherlands in 2012 he worked one year in industry followed by a postdoc at TU Delft. With his research, he aims to participate in building a sustainable future, which is powered by renewable energy conversion technologies. His research focus is photovoltaic solar energy, especially optical simulations of solar cells. He is author of more than 70 research articles in scientific journals and conference contributions. Klaus is a Senior Member of Optica and currently serves as associate editor for Optics Express.