[ELI5]: if every light emmiting diode is also a solar panel, why dont smartphones have the ability to charge via the sun?

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[ELI5]: if every light emmiting diode is also a solar panel, why dont smartphones have the ability to charge via the sun?

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cellomold commented

Mainly because they aren’t very efficient being used that way. It’s the same issue with microphones and speakers. They technically can be used interchangeably but a microphone makes a terrible speaker and a speaker makes a terrible microphone. LEDs are just better at emitting light. Also, solar panels are so bad at emitting light that the light they do emit isn’t even visible.