1. BP Statistics 2018, and Energy White Paper from Agency for Natural Resources and Energy under the Ministry of Economy,2018
2. International Technology Roadmap for Photovoltaic Results 2016,2017
3. Effect of the compositional distribution on the photovoltaic power conversion of SiGe solar cells
4. Report of RTS Corporation, vol. 26, p. 21 (2017).
5. The effect of substrate material on nucleation behavior of molten silicon for photovoltaics