1. The National Renewable Energy Laboratory website, www.nrel.gov.
2. Achievement of more than 25% conversion efficiency with crystalline silicon heterojunction solar cell;Masuko;IEEE J. Photovoltaics,2014
3. K. Yamamoto, 25.1% efficiency Cu metallized heterojunction crystalline Si solar cell, 25th international photovoltaic science and engineering conference, Busan, Korea, November 2015.
4. Third Generation Photovoltaics;Green,2003
5. Mg doping for p-type AlInN lattice-matched to GaN;Taniyasu;Appl. Phys. Lett.,2012