title: Monolayer MoS2 heterojunction solar cells.
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.
authors.forename: Meng-Lin
authors.initials: ML
authors.lastname: Tsai
authors.forename: Sheng-Han
authors.initials: SH
authors.lastname: Su
authors.forename: Jan-Kai
authors.initials: JK
authors.lastname: Chang
authors.forename: Dung-Sheng
authors.initials: DS
authors.lastname: Tsai
authors.forename: Chang-Hsiao
authors.initials: CH
authors.lastname: Chen
authors.forename: Chih-I
authors.initials: CI
authors.lastname: Wu
authors.forename: Lain-Jong
authors.initials: LJ
authors.lastname: Li
authors.forename: Lih-Juann
authors.initials: LJ
authors.lastname: Chen
authors.forename: Jr-Hau
authors.initials: JH
authors.lastname: He