Biomass converted carbon quantum dots for all-weather solar cells

[Display omitted] •CQDs are converted from soybean powders by a hydrothermal method.•The biomass converted CQDs are used for all-weather DSSCs.•The so-called all-weather DSSCs can generate electricity in the daytime and dark.•A dark efficiency as high as 7.97% is determined on the all-weather photov...

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