Temperature dependence of photoluminescence lifetime of atomically thin WSe2 layer

Aleksandra Łopion; Mateusz Goryca; Tomasz Smoleński; Kacper Oreszczuk; Karol Nogajewski; Maciej R. Molas; Marek Potemski; Piotr Kossacki

Temperature dependence of photoluminescence lifetime of atomically thin WSe2 layer

Mesoscale and Nanoscale Physics 2019-12-06 v1

Authors: Aleksandra Łopion , Mateusz Goryca , Tomasz Smoleński , Kacper Oreszczuk , Karol Nogajewski , Maciej R. Molas , Marek Potemski , Piotr Kossacki

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Abstract

At cryogenic temperatures, the photoluminescence spectrum of monolayer WSe2features a num-ber of lines related to the recombination of so-called localized excitons. The intensity of these lines strongly decreases with increasing temperature. In order to understand the mechanism behind this phenomenon, we carried out a time-resolved experiment, which revealed a similar trend in the photoluminescence decay time. Our results identify the opening of additional nonradiative relaxation channels as a primary cause of the observed temperature quenching of the localized excitons' photoluminescence.

Keywords

photoluminescence lifetime monolayer wse2 localized excitons temperature dependence nonradiative relaxation time-resolved experiment

Cite

@article{arxiv.1912.02573,
  title  = {Temperature dependence of photoluminescence lifetime of atomically thin WSe2 layer},
  author = {Aleksandra Łopion and Mateusz Goryca and Tomasz Smoleński and Kacper Oreszczuk and Karol Nogajewski and Maciej R. Molas and Marek Potemski and Piotr Kossacki},
  journal= {arXiv preprint arXiv:1912.02573},
  year   = {2019}
}

Temperature dependence of photoluminescence lifetime of atomically thin WSe2 layer

Abstract

Keywords

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