A near-infrared cousin of MoS2 with unusually clean optical properties: cooled and protected between boron nitride layers, its excitons produce some of the narrowest emission lines of any 2D semiconductor. That makes it a favourite for studying how light and electrons interact in two dimensions, and a common building block in moiré heterostructures.
They are coordination polyhedra. Only complete ones are drawn.
Three layers of 2H-MoSe2, stacked like molybdenite: each layer is turned by 180° against the one below, so molybdenum sits over selenium, and every second layer repeats. c = 12.90 Å. A stack with an even number of layers has an inversion centre; one with an odd number does not. Cell from James and Lavik, Acta Crystallographica 16, 1183 (1963); COD 2310945.
Three layers of 3R-MoSe2, a polymorph first made at high pressure and temperature. Each layer is shifted by the same step in the same direction, so selenium sits over molybdenum and the pattern repeats only after three layers: c = 19.39 Å. It has no inversion centre at any thickness. Cell from Towle, Oberbeck, Brown and Stajdohar, Science 154, 895 (1966); COD 1528933.
Readiness runs lab → prototype → pilot → deployed.
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A clean system for exciton–electron many-body physics: in doped samples the Fermi-polaron picture has largely replaced simple trion models. The bright lowest exciton follows from band ordering, but the small conduction-band spin splitting (~20 meV) still needs SOC. Include substrate screening explicitly – quasiparticle gaps shift by hundreds of meV between vacuum, hBN and graphene.
Raman A′1 near 241 cm−1 and E′ near 287 cm−1; the interlayer B12g mode near 353 cm−1 is absent in monolayers and appears from bilayers onwards – a convenient thickness check. Encapsulate in hBN to reach narrow excitonic lines.
Mainly a research material. Selenium precursors complicate MOCVD safety (H2Se is highly toxic), and MoSe2 offers no clear transistor advantage over MoS2 or WSe2.
The newest items tagged MoSe2, from the news feed updated 5 Oct 2026.
We numerically study exciton-photon coupling in a hybrid structure composed of a period-doubled Si3N4 photonic crystal slab and an hBN-encapsulated MoSe2 monolayer. Period doubling folds quasi-guided modes into the light cone and produces spectrally separated photonic branches whose radiative character is controlled by…
Two-dimensional transition metal dichalcogenides offer unprecedented opportunities for quantum photonics through strain-mediated exciton engineering. However, the paradoxical coexistence of strain-gradient-driven exciton funneling and efficient trion formation has remained unresolved. Here, we addre… [Phys. Rev. B 114…
Excitonic states in two-dimensional semiconductors are sensitive to time-reversal symmetry breaking, yet how interfacial exchange acts on higher-lying exciton Rydberg states remains largely unexplored. Here we show that wavelength-resolved magneto-optical Kerr spectroscopy of a proximity-coupled MoSe2/Fe3GaTe2 van der…
Here, the authors investigate the transport kinetics of indirect excitons (IXs) in a MoSe2/WSe2 van der Waals heterostructure, and observe anomalously high IX mobility, consistent with IX superfluidity.
The role of nonlinear carrier dynamics in current-driven spin phenomena remains poorly understood in van der Waals magnetic heterostructures. Here, we investigate the spin polarization and the resulting spin-orbit torque (SOT) in transition-metal dichalcogenide/chromium iodide (TMDC/CrI3) heterostructures, focusing on…
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