Effect of Annealing on the Optical Properties of WSe2 Monolayer Obtained by Gold-Assisted Mechanical Exfoliation.

Autor: Chernopitssky, M. A., Nikolaev, S. N., Krivobok, V. S., Usmanov, I. I., Deeva, A. A.
Zdroj: Bulletin of the Lebedev Physics Institute; Aug2022, Vol. 49 Issue 8, p252-256, 5p
Abstrakt: Based on measurements of low-temperature (5 K) photoluminescence and reflectance spectra, changes in optical properties of a WSe2 monolayer resulting from vacuum annealing at a temperature of 300°С are shown. Initial monolayers were obtained by gold-assisted mechanical exfoliation from a bulk material. It is shown that annealing results in narrowing the resonance associated with the A-exciton, trion luminescence suppression, and the appearance of polarized impurity—defect luminescence. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index