US photovoltaics research leaders say that solar research is not finished yet; see: https://daedalus.caltech.edu/files/2016/04/Zhang_NatPhoton_Mar2016.pdf
US photovoltaics research leaders say that solar research is not finished yet; see: https://daedalus.caltech.edu/files/2016/04/Zhang_NatPhoton_Mar2016.pdf