Data-driven discovery of new photovoltaic materials
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강영호 인천대 Photoabsorber is a key component of solar cells to convert solar energy into electricity. Even if conventional inorganic semiconductors such as Si, GaAs, and Cu(In,Ga)S(Se)2 have been most widely studied in application to photoabsorbers, the recent emergence of lead halide perovskites that may lead to big breakthrough in solar cell technology have promoted numerous researches to discover new interesting photoabsorbers. In this presentation, I am going to introduce the results of our computational screening of potential photoabosorbers. I will first discuss a benefit of weak indirect nature of the band gap of photoabsorbers in terms of band-to-band recombination. Then, I will show how we can detect promising indirect-gap semiconductors for photovoltaics using a computational high-throughput screening. Finally, various properties of three candidates, namely SiAs2, GeAs2, and NaSbS2, which are identified by the screening, will be discussed. |