Halide Perovskite Nanoplatelets: Fundamentals for Optoelectronics
Alexander Urban a
a Ludwig Maximilians University (LMU) Munich, Butenandtstr. 11, Munich, Germany
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
València, Spain, 2022 May 19th - 25th
Organizers: Pablo Docampo, Eva Unger and Elizabeth Gibson
Invited Speaker, Alexander Urban, presentation 022
DOI: https://doi.org/10.29363/nanoge.hopv.2022.022
Publication date: 20th April 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. 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 on exciton-phonon coupling.[2] Further, I will look into carrier transport mechanisms and highlight their advantages and disadvantages for integration into optoelectronic applications.

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