Refractive index database

nk database   |   n2 database   |   about




Optical constants of MoSe2 (Molybdenum diselenide)
Munkhbat et al. 2022: multilayer flakes; n(e) 0.30–1.69 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Conditions & Spec sheet

n_is_absolute: true
wavelength_is_vacuum: true


Multilayer flakes. Out-of-plane (extraordinary ray, e). Room temperature.


B. Munkhbat, P. Wrobel, T. J. Antosiewicz, T. O. Shegai. Optical constants of several multilayer transition metal dichalcogenides spectroscopic ellipsometry in the 300–1700 nm range: High index, anisotropy, and hyperbolicity, ACS Photonics 9, 2398–2407 (2022) (Numerical data kindly provided by Tomasz Antosiewicz)


[CSV - comma separated]   [TXT - tab separated]   [Full database record]


Molybdenum diselenide, MoSe2

Molybdenum diselenide (MoSe2) is a layered compound similar in structure to molybdenum disulfide (MoS2). Each layer consists of a plane of molybdenum atoms sandwiched between two planes of selenium atoms. These layers are held together by weak van der Waals forces, allowing them to be easily exfoliated. In its bulk form, MoSe2 behaves as an indirect bandgap semiconductor. However, when reduced to a monolayer, its properties shift, and it becomes a direct bandgap semiconductor. This transition in electronic properties has attracted considerable interest in the fields of optoelectronics and nanotechnology. Potential applications include use in transistors, photodetectors, and other electronic or optoelectronic devices, especially when high-quality thin films or single layers are employed.

Other names

  • Molybdenum selenide
  • Diselanylidenemolybdenum

External links