Ever heard of Perovskite LEDs
By Rob Lavinsky, iRocks.com – CC-BY-SA-3.0, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=10146594
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me either, basically they are LEDs made from calcium and titanium. Read all about them here.
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allora clicca il link e leggi 🙂