Shining Light on Solar Cells - Chapter 8: Thin Film Solar Cells

In Chapter 8 of the video series "Shining Light on Solar Cells", we finally begin the more advanced section of the video series, starting by learning about thin film 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
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Citations:
“Solar calculator. Casio-fx115ES. Detail view of solar cell and LCD display” by Loadmaster(David R. Tribble) is licensed under CC BY-SA 3.0
“CIGS cell on a flexible plastic backing. Other architectures use rigid CIGS panels sandwiched between two panes of glass.” by Dantor is licensed under CC BY-SA 3.0

[@juancastillo-ct2rq]

Amazing video !!!

[@BlackRockExecutive]

Hi Juan, Christopher here. Thank you so much for liking my content. Do share it with your friends!😃 It would help me out alot

[@Chandula100]

This is great but, I couldn't grab one thing: How the minority carriers in the n side (holes) are prevented from recombining with the defect states near the anode connector by the energy barrier introduced from the ETL layer, the Schottky junction between ETL and N side CdS frankly facilitates the hole transportation through the Schottky junction
Please describe it for me; I might be misunderstanding a crucial fact.

[@BlackRockExecutive]

Hi Chandula,
Christopher here. While the ETL forms a Schottky junction with the n side, recombination between the minority carrier hole only happens when the hole reaches the anode layer. As you can see even if the hole moves up the Schottky junction, the entry to the anode is hindered by a big piece of energy barrier in the ETL (just on the left side of the Schottky junction).
A great and intuitive way to look at it is if you were to rotate your entire screen upside down and imagine these barriers as hills and valleys, and the hole as a ball, which is affected by gravity. It is usually easier to see for electrons because analogically the energy levels work in the same direction as gravity. But for holes, you need to rotate your screen to "change the direction of gravity".