Shining Light on Solar Cells - Chapter 9: Multi-junction (Tandem) Solar Cells

In Chapter 9 of the video series "Shining Light on Solar Cells", we explore how we can break the Shockley Queisser limit by using the multi-junction concept. This video covers some basic design principles of multi-junction solar cells.
Check out the written version of this video on the DesignSpark website: www.rs-online....
Watch the other videos in the Shining Light on Solar Cells series here: • Shining Light on Solar...
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Let us know in the comments if you have any questions! Like and subscribe if you dig this :D
This series is proudly sponsored by RS Grass Roots Education: www.rs-online....
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Written, filmed, presented, and produced by Christopher Tan.
If you would like further personalised Q&As, please contact Christopher Tan via his Linkedin: / chrissilverence

[@maikewurster5946]

i think the illustration at minute 3:00 should be the other way around. photons with higher energy (the brown-ish region) will be absorbed in the upper cell with higher bandgap. photons with lower energy (the grey-ish region) will transmite through the upper layer because their energy is to low to lift the electron "over" the bandgap. That's why they will be absorbed at the bottom cell that has a lower bandgap.

[@BlackRockExecutive]

Hi there, Christopher here. Thank you for your comment. I see the confusion here. In the graph, Eg1 is higher than Eg2 (the energy increases towards the right side of the x-axis). So the greyish region is the higher energy region, and the brownish region is the lower energy region.
Hope that clears things up!

[@garciadiegos]

What a great explanation! May you indicate to me papers about it?

[@BlackRockExecutive]

Could I request that you share this video to your network? It would do wonders for me!

[@BlackRockExecutive]

Christopher here, thank you for your comment! You can refer to this book "Handbook of Photovoltaic Science and Engineering" and go to the chapter on multijunction solar cells.