Technical FAQs 4

How efficient are monocrystalline solar cells?

Monocrystalline solar cells reached efficiencies of 20% in the laboratory in 1985 (ref. 238) and of 26.2% under 100× concentration in 1988 (ref. 239). In this period, the efficiency of industrial solar cells slowly grew from 12% to 14.5%.

What is the conversion efficiency of crystalline silicon heterojunction solar cells?

Masuko, K. et al. Achievement of more than 25% conversion efficiency with crystalline silicon heterojunction solar cell. IEEE J. Photovolt. 4, 1433–1435 (2014). Boccard, M. & Holman, Z. C. Amorphous silicon carbide passivating layers for crystalline-silicon-based heterojunction solar cells. J. Appl. Phys. 118, 065704 (2015).

How much does a crystalline silicon module cost?

Today’s typical wholesale price for mainstream crystalline silicon modules is in the range US$0.17–0.25 W −1 (ref. 10), depending on the type and efficiency, which converts to a staggering low US$35–50 m −2. Data until 2021 adapted with permission from ref. 10, Fraunhofer ISE.

How efficient is a silicon heterojunction solar cell with molybdenum oxide?

Dréon, J. et al. 23.5%-efficient silicon heterojunction silicon solar cell using molybdenum oxide as hole-selective contact. Nano Energy 70, 104495 (2020). Bullock, J. et al. Dopant-free partial rear contacts enabling 23% silicon solar cells. Adv. Energy Mater. 9, 1803367 (2019).

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