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Monolayer MoS2 Heterojunction Solar Cells

ACS Nano · 2014 · Vol. 8(8) · pp. 8317–8322

Meng‐Lin Tsai✉(National Tsing Hua University)Sheng‐Han Su(National Taiwan University)Jan‐Kai Chang(National Taiwan University)Dung‐Sheng Tsai(National Taiwan University)Chang‐Hsiao Chen(Institute of Atomic and Molecular Sciences, Academia Sinica)Chih‐I Wu(National Taiwan University)Lain‐Jong Li(King Abdullah University of Science and Technology)Lih‐Juann Chen(National Tsing Hua University)Jr‐Hau He(King Abdullah University of Science and Technology)

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Abstract

We realized photovoltaic operation in large-scale MoS2 monolayers by the formation of a type-II heterojunction with p-Si. The MoS2 monolayer introduces a built-in electric field near the interface between MoS2 and p-Si to help photogenerated carrier separation. Such a heterojunction photovoltaic device achieves a power conversion efficiency of 5.23%, which is the highest efficiency among all monolayer transition-metal dichalcogenide-based solar cells. The demonstrated results of monolayer MoS2/Si-based solar cells hold the promise for integration of 2D materials with commercially available Si-based electronics in highly efficient devices.

2D Materials and Applications Nanowire Synthesis and Applications Quantum Dots Synthesis And PropertiesMonolayerHeterojunctionMaterials scienceOptoelectronicsPhotovoltaic systemEnergy conversion efficiencySolar cellNanotechnologyElectrical engineering

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