Can you generate a solar power bank and solar phone in case of emergency

Can you generate a solar power bank and solar phone in case of emergency, one solar power bank picture and one solar smart phone like we use smart phone today but has no solar, but in the picture you need to put at least a small piece of solar panel that is suitable for phone to use it just in case no electricity at all, but theres a sunlight to sunset light that will help to produce battery percentage to the phone somehow