[bicubic]

https://link.springer.com/chapter/10.1007/978-3-030-05843-2_...

Refer to Fig. 11.1

If you need more help to identify REM or understand basic PV chemistry, get in touch with a local middle school chem tutor, they will help you out.

[jhgb]

Zero mention of rare earth metals in conjunction with PV, as expected. Thanks for agreeing with me.

[EDIT: Even in wind turbines, they're not technically necessary, as, e.g., Enercon turbines such as https://www.enercon.de/en/products/ep-8/e-126/ with induction generators are demonstrating. But I'm glad we dispelled once and for all this with this nonsense that lanthanoids have anything to do with PV technology.]