Figure 8.

Pressure‐induced doping. a–c) Schematic diagram of the transition process for neutral exciton (X⁰) and trions (X⁻) in 2H‐MoSe₂ monolayer, peak position evolutions of X⁰ and X⁻ versus pressure, and the PL intensity ratio of X⁰ to X⁻ as a function of pressure, respectively.^{[ 46 ]} d,e) Calculated electronic structure at ambient pressure and 3 GPa. f) The Dirac point (left axis) and the induced carrier density (right axis) of graphene from the heterostructure of graphene/MoS₂ versus pressure. a–c) Reproduced with permission.^{[ 46 ]} Copyright 2017, American Chemical Society. d–f) Reproduced with permission.^{[ 37 ]} Copyright 2016, Wiley‐VCH.