New ways to harvest light with low-cost photovoltaic materials

The direct conversion of sunlight into electricity using photovoltaics is becoming an increasingly important technology for renewable energy generation as a replacement for fossil fuels, with applications from large-scale generation to roof-top solar panels and even mobile phones. But photovoltaics still accounts for only a marginal fraction of global energy supply. One of the main reasons for this is the relatively high cost of the base material — silicon — used in the most common type of solar cell.

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