Radiative Recombination Mechanisms Involving Exciton States of the Direct Fundamental Absorption Edge in Bilayer WSe2


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Abstract

Methods for production of atomically thin WSe2 films and optical control of their thickness are developed. For two-monolayer-thick WSe2 films, photoluminescence spectra associated with the emission of exciton states of the direct fundamental absorption edge at a temperature of 5–70 K are measured. Along with the emission of intrinsic excitons of the bilayer, new defect-related emission lines are detected.

About the authors

S. N. Nikolaev

Lebedev Physical Institute

Author for correspondence.
Email: nikolaev-s@yandex.ru
Russian Federation, 53 Leninskii Pr., Moscow, 119991

V. S. Krivobok

Lebedev Physical Institute

Email: nikolaev-s@yandex.ru
Russian Federation, 53 Leninskii Pr., Moscow, 119991

E. E. Onishchenko

Lebedev Physical Institute

Email: nikolaev-s@yandex.ru
Russian Federation, 53 Leninskii Pr., Moscow, 119991

M. A. Chernopitsskii

Lebedev Physical Institute

Email: nikolaev-s@yandex.ru
Russian Federation, 53 Leninskii Pr., Moscow, 119991

V. S. Bagaev

Lebedev Physical Institute

Email: nikolaev-s@yandex.ru
Russian Federation, 53 Leninskii Pr., Moscow, 119991

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