Simulations of ultrathin monolayer/multilayer molybdenum disulfide heterojunction solar cell

Ultrathin solar cell has good potential in photovoltaics, monolayer and multilayer transition metal dichalcogenide materials could be used to make ultrathin solar cell because of their high absorption coefficients. The photovoltaic characteristics of monolayer MoS2/multilayer MoS2 vertical heterojunction ultrathin solar cell was calculated in this work based on SCAPS simulation software, monolayer MoS2 was used to make window layers and transparent conducting layers at the same time, multilayer MoS2 was used to make absorber layer. The highest efficiency of the cell with the thickness of 200 nm could reach 16.8% when the lifetime of multilayer MoS2 was larger than 250 ns, the electron and hole mobility of multilayer MoS2 was larger than 14 cm(2)/V, the recombination velocity of monolayer/multilayer MoS2 interface was smaller than 1 x 10(6) cm/s. The transmittance of the cell with the thickness of 200 nm approached 1 when wavelength was larger than 740 nm. Thus, monolayer/multilayer MoS2 vertical heterojunction solar cell has good potential in semitransparent solar cell, and the cell could be used as the top cell of silicon based tandem cell.

Automated summary

The photovoltaic characteristics of monolayer MoS2/multilayer MoS2 vertical heterojunction ultrathin solar cell were calculated, and the highest efficiency of the cell could reach 16.8% under specific conditions.