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Article Dans Une Revue Nanomaterials Année : 2021

Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets

Résumé

Owing to their flexible chemical synthesis and the ability to shape nanostructures, lead halide perovskites have emerged as high potential materials for optoelectronic devices. Here, we investigate the excitonic band edge states and their energies levels in colloidal inorganic lead halide nanoplatelets, particularly the influence of dielectric effects, in a thin quasi-2D system. We use a model including band offset and dielectric confinements in the presence of Coulomb interaction. Short- and long-range contributions, modified by dielectric effects, are also derived, leading to a full modelization of the exciton fine structure, in cubic, tetragonal and orthorhombic phases. The fine splitting structure, including dark and bright excitonic states, is discussed and compared to recent experimental results, showing the importance of both confinement and dielectric contributions
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Origine : Publication financée par une institution

Dates et versions

hal-03457290 , version 1 (30-11-2021)

Identifiants

Citer

Amal Ghribi, Rim Ben Aich, Kaïs Boujdaria, Thierry Barisien, Laurent Legrand, et al.. Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets. Nanomaterials, 2021, 11 (11), pp.3054. ⟨10.3390/nano11113054⟩. ⟨hal-03457290⟩
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