Free Trions with Near-Unity Quantum Yield in Monolayer MoSe<sub>2</sub>
Bumho Kim, Yue Luo, Daniel Rhodes, Yusong Bai, Jue Wang, Song Liu, Abraham J. Jordan, Baili Huang, Zhaochen Li, Takashi Taniguchi, Kenji Watanabe, Jonathan S. Owen, Stefan Strauf, Katayun Barmak, Xiaoyang Zhu, James Hone
Abstract
monolayers, with atomic defect density varying by over 2 orders of magnitude. The QY increases with decreasing defect density and approaches unity in the cleanest material. Simultaneous measurement of the PL lifetime yields both the intrinsic radiative lifetime and the defect-dependent nonradiative lifetime. The long lifetime of ∼230 ps of trions allows direct observation of their diffusion.
Topics & Concepts
TrionPhotoluminescenceQuantum yieldMonolayerQuasiparticleMaterials scienceCondensed matter physicsQuantum wellElectronDensity functional theoryAtomic physicsMolecular physicsPhysicsOptoelectronicsNanotechnologyQuantum mechanicsFluorescenceSuperconductivityLaser2D Materials and ApplicationsMXene and MAX Phase MaterialsGraphene research and applications