Summary #622

Experiments show dramatic increase in solar cell output
  • By figuring out how to split one high-energy photon into two electrons in a silicon solar cell, scientists increased the amount of power it can produce.
  • Theoretical maximum was increased from 29.1% to 35% by adding an excitonic material and a thin (8 ten-billionths of a meter) layer of hafnium oxynitride.
  • This concept has been around for decades, but it took years of work to turn it into an operational cell.
  • The coupling of excitonic materials and silicon was never done before.
  • More development is needed, but it’s a promising approach because instead of adding cells, this method relies on adding more current into one cell.


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