It's a cute approach, but perovskite solar cells can probably do much better. Perovskite solar cells can be made at close to room temperature, use relatively common elements, and can be made fairly thin. The current efficiency record for perovskite solar cells is 25.6%[0].
[0]https://www.pv-magazine.com/2021/04/06/unist-epfl-claim-25-6...