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Building perovskite superlattices by shape-tuning perovskite nanocrystals for enhanced superfluorescent emission

Project description

Enhancing collective emission of perovskite materials with superlattice structures

Lead halide perovskite nanocrystals, tiny yet powerful light-emitting diodes, are highly valued in light-emitting and laser applications. They stand out because they can be tailored in various shapes, sizes and compositions to achieve high emission efficiency. The self-assembly of these nanocrystals into superlattices can produce superfluorescence – a focused burst of collective emission. Funded by the Marie Skłodowska-Curie Actions programme, the SPUREPER project aims to synthesise shape-tuned perovskite nanocrystals via a new method and explore pure perovskite superlattices with enhanced collective emission. Researchers will use post-injecting halide sources and alkylamine ligands to create monodisperse nanospheres and nanocubes and assembly them into 3D structures. Furthermore, they will investigate how solvents affect superlattice arrangement and measure the superfluorescence of various perovskite superlattices.

Objective

Lead halide perovskite nanocrystals exhibit high emission coefficients with controllable shapes, sizes and compositions. Moreover, the self-assembly of perovskite nanocrystals into consistent superlattices can generate a focused and intense burst of collective coupling emission called superfluorescence. These prominent features made them attractive in light-emitting and laser applications. In SPUREPER, shape-tuning perovskite nanocrystals will be synthesised via a new route and pure perovskite superlattices through different shapes of nanocrystals with controllable aggregated structures and enhanced collective emission will be explored. In WP1, a concept of post-injection of halide source and alkylamine ligands into the lead-oleate and caesium-oleate complexes is proposed to achieve monodisperse perovskite nanospheres and nanocubes. Introducing other metal cations partially replacing lead at the beginning of synthesis controls the growth of crystals, and post-injecting alkylamine modifies the nanocrystals into a spherical shape. In WP2, pure perovskite superlattices in various three-dimensional structures will be built by co-assembling perovskite nanospheres and nanocubes. The size and relative ratios of nanospheres and nanocubes will be tuned to modify nanocrystal packing structure, packing density, and aggregated orientations in superlattices. Moreover, the self-assembling behaviour of solely perovskite nanospheres will be exploited. In addition, the influence of the solvent, whose polarity and volatility are essential in forming a well-organised three-dimensional structure, on the arrangement behaviour of superlattices will be studied. In WP3, superfluorescence will be measured in these various perovskite superlattices. Peak shift and intensity adjustment of the coupling emission will be correlated to the packing manners involving structure, density, and coupling number in the superlattices.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2023-PF-01

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Coordinator

FONDAZIONE ISTITUTO ITALIANO DI TECNOLOGIA
Net EU contribution
€ 182 012,08
Address
VIA MOREGO 30
16163 Genova
Italy
Region
Nord-Ovest Liguria Genova
Activity type
Research Organisations
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Total cost
No data