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Transparent solar cell technology could allow smartphones and cars to self-charge
(www.techspot.com)
this post was submitted on 18 Sep 2024
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Technology
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Did a simple calculation to see how long it would take for such a tiny solar panel they made to charge the phone. And that's not using the phone (turned off) and without concern for overheating the phone by putting it in direct sunlight. The efficiency of regular solar panels are bad, this transparent thing is cool but way worse than regular panels. In an optimized scenario such as in the paper (not realistic) it would take 60 hours for a full charge. Since there aren't usually 24 hours of sunlight (let alone full direct sunlight) it would probably take well over a week to charge.
Self charging phones using solar isn't a thing that's practically possible.
Even at high efficiency (which isn't possible) it isn't practical since phones don't do well in the sun and are usually stored in pockets, bags and often have covers over them. Plus they are mostly used inside where there isn't sun, or outside where most of the times there also isn't a lot of sun.
Just put a solar panel on the roof, that's the best place for solar panels.
You could look at it another way- a solar power screen on a phone won't charge it all the way, but as a secondary source of power that is essentially always on when the sun is up or other light sources are on, it reduces the battery drain over the day, meaning less charging needed at night.
It's so tiny that it's a waste of time and money. Most phones can charge in an hour now, so there's no need to shave 60s off a night charge by exposing your phone to the sun all day.
Carry a power bank if you are constantly draining your phone all day.