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arXiv · 1912.02573

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
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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.

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Aleksandra Łopion, Mateusz Goryca, Tomasz Smoleński, Kacper Oreszczuk, Karol Nogajewski, Maciej R. Molas, Marek Potemski, Piotr Kossacki. 2019-12-05. Temperature dependence of photoluminescence lifetime of atomically thin WSe2 layer. https://arxiv.org/abs/1912.02573

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