Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
DOI: https://doi.org/10.29363/nanoge.nfm.2022.137
Publication date: 11th July 2022
Halide perovskite nanocrystals (NCs) have emerged as an intriguing material for optoelectronic applications, most notably for light-emitting diodes (LEDs), lasers, and solar cells. Their emission wavelength depends not only on material composition but also on size and dimensionality, as in the case of two-dimensional (2D) nanoplatelets (NPLs). These colloidal quantum wells have additional appeal for light emission, as the one-dimensional quantum confinement enhances their radiative rates and enables directional outcoupling. On top of this, due to a monolayer-precise control over their thickness, they constitute an intriguing system for spectroscopic studies on their fundamental optical, phononic, and energetic properties.
In this talk, I will explore our recent results on halide perovskite NPLs, including their synthesis and stabilization. I will focus on their interesting excitonic properties, such as the energetic fine structure[1] with a strong thickness-dependent bright-dark exciton splitting and exciton diffusion in nanocrystal films.[2] Further, I will highlight their advantages and disadvantages for integration into optoelectronic applications.
[2] Lichtenegger, M. F.; Drewniok, J.; Bornschlegel, A.; Lampe, C.; Singldinger, A.;
Henke, N.A.; Urban, A. S. Electron-Hole Binding Governs Carrier Transport in Halide Perovskite Nanocrystal Thin Films. ACS Nano 2022, 16, 6317-6324.
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