AI Summary

Researchers note that graphene’s single‑atom thickness gives electrons exceptionally high mobility, making it attractive for fast electronic components, but its lack of a bandgap hampers efficient light‑to‑electricity conversion. When graphene absorbs light, electrons are excited while positively charged “holes” remain, yet without a mechanism to separate and route these carriers to distinct contacts the energy cannot be harvested. Conventional solar cells rely on semiconductor bandgaps, such as silicon’s, to achieve this separation, a capability graphene inherently lacks.

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