Negative diffusion of excitons in quasi-two-dimensional systems

Kurilovich, Aleksandr A.; Mantsevich, Vladimir N.; Chechkin, Aleksei V.; Palyulin, Vladimir V.

doi:10.1039/d3cp03521b

Phys. Chem. Chem. Phys.

2024

DOI: 10.1039/d3cp03521b

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Negative diffusion of excitons in quasi-two-dimensional systems

Aleksandr A. Kurilovich,

Vladimir N. Mantsevich,

Aleksei V. Chechkin

et al.

Abstract: We show how two different mobile-immobile type models explain the observation of negative diffusion of excitons reported in experimental studies in quasi-two-dimensional semiconductor systems.

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Cited by 4 publications

References 101 publications

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Photoluminescence decay of mobile carriers influenced by imperfect quenching at particle surfaces with subdiffusive spread

Katoh,

Seki

2024

The Journal of Chemical Physics

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We recently presented a quantitative model to explain the particle-size dependence of photoluminescence (PL) quantum yields and revealed that exciton quenching is not diffusion controlled, but limited by surface reactions. However, the exciton decay kinetics has not been analyzed yet using our theoretical model. Here, we study kinetic aspects of the model and show that it should be extended to take into account subdiffusion rather than normal diffusion to maintain consistency with the observed complex decay kinetics; we also show that the PL decay kinetics is nonexponential even when the PL quenching is limited by surface reactions under subdiffusion. Our theoretical analysis of the PL quantum yield and the PL decay kinetics provides a comprehensive picture of mobile charge carriers, immobile polarons, and self-trapped excitons.

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Photoluminescence decay of mobile carriers influenced by imperfect quenching at particle surfaces with subdiffusive spread

Katoh,

Seki

2024

The Journal of Chemical Physics

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Viscous hydrodynamics of excitons in van der Waals heterostructures

Mantsevich,

Glazov

2024

Phys. Rev. B

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Diffusion of fast and slow excitons with an exchange in quasi-two-dimensional systems

Adejumobi,

Mantsevich,

Palyulin

2024

Phys. Rev. E

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Negative diffusion of excitons in quasi-two-dimensional systems

Abstract: We show how two different mobile-immobile type models explain the observation of negative diffusion of excitons reported in experimental studies in quasi-two-dimensional semiconductor systems.

Cited by 4 publications

References 101 publications

Photoluminescence decay of mobile carriers influenced by imperfect quenching at particle surfaces with subdiffusive spread

Photoluminescence decay of mobile carriers influenced by imperfect quenching at particle surfaces with subdiffusive spread

Viscous hydrodynamics of excitons in van der Waals heterostructures

Diffusion of fast and slow excitons with an exchange in quasi-two-dimensional systems

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