Gregory M. Wilson, Mowafak Al-Jassim, Wyatt K. Metzger, Stefan W. Glunz, Pierre Verlinden,
                           Gang Xiong, Lorelle M. Mansfield, Billy J. Stanbery, Kai Zhu, fa Yan, Joseph J. Berry,
                           Aaron J. Ptak, Frank Dimroth, Brendan M. Kayes, Adele C. Tamboli, Robby Peibst, Kylie
                           Catch- pole, Matthew O. Reese, Christopher S. Klinga, Paul Den- holm, Mahesh Morjaria,
                           Michael G. Deceglie, Janine M. Freeman, Mark A. Mikofski, Dirk C. Jordan, Govindasamy
                           TamizhMani, Dana B. Sulas-Kern, September 2020, The 2020 photo- voltaic technologies
                           roadmap, Applied Physics, Vol. 53, No. 49
