[1] Novoselov K S, Geim A K, Morozov S V, et al. Two-dimensional gas of massless dirac fermions in grapheme[J]. Nature, 2005, 438: 197-200.
[2] Xia F, Farmer D B, Lin Y, et al. Graphene field-effect transistors with high on/off current ratio and large transport band gap at room temperature[J]. Nano Letters, 2010, 10: 715-718.
[3] Zhuang H L, Henning R G. Computational search for single-layer transition-metal dichalcogenide photocatalysts[J]. Journal of Physical Chemistry C, 2013, 117: 20440-20445.
[4] Kang J, Tongay S, Zhou J, et al. Band offsets and heterostructures of two-dimensional semiconductors[J]. Applied Physics Letters, 2013, 102: 12111.
[5] Berkelbach T C, Hybersen M S, Reichman D R. Theory of neutral and charged excitons in monolayer transition metal dichalcogenides[J]. Physical Review B, 2013, 88: 045318.
[6] Kang D-H, Pae S R, Shim J, et al. An ultrahigh-performance photodetector based on a perovskite-transition-metal-dichalcogenide hybrid structure[J]. Advanced Material, 2016, 28: 7799-7806.
[7] Cheng R, Li D, Zhou H, et al. Electroluminescence and photocurrent generation from atomically sharp WSe2 /MoS2 heterojunction p-n diodes[J]. Nano Letters, 2014, 14: 5590-5597.
[8] Ye Y, Wong Z J, Lu X, et al. Monolayer excitonic laser[J]. Nature Photonics, 2015, 9: 733-737.
[9] Radisavljevic B, Whitwick M B, KisA. Integrated circuits and logic operations based on single-layer MoS2[J]. ACS Nano, 2011, 5: 9934-9938.
[10] He JQ, Kumar N, Bellus M Z, et al. Electron transfer and coupling ingraphene-tungsten disulfide van der Waals heterostructures[J]. Nature Communication, 2014, 5: 5622.
[11] Chen H L, Wen X W, Zhang J, et al. Ultrafast formation of interlayer hot excitons in atomically thin MoS2/WS2 heterostructures[J]. Nature Communication, 2016, 7: 12512.
[12] Chen K, Gallaher J K, Barker A J, et al. Transient grating photoluminescence spectroscopy: an ultrafast method of gating broadband spectra[J]. Journal of Physical Chemistry Letters, 2014, 5: 1732-1737.
[13] Zhao L, Luis P L, Farztdinov V, et al. Femtosecond fluorescence spectroscopy by upconversion with tilted gate pulses[J]. Physical Chemistry Chemical Physics, 2005, 7: 1716-1725.
[14] Chen K, Barker A J, Reish M E, et al. Broadband ultrafast photoluminescence spectroscopy resolves charge photogeneration via delocalized hot excitons in polymer:-fullerene photovoltaic blends[J]. Journal of American Chemistry Society, 2013, 135: 18502-18512.
[15] TakedaA J, Nakajimma K, Kurita S, et al. Time-resolved luminescence pectroscopy by the optical Kerr-gate method applicable to ultrafast relaxation processes[J]. Physical Review B, 2000, 62: 10083.
