Extremely large broadband emission of CdSe/CdS nanocrystals  under high excitation

Agnès Maître; Damien Simonot; Lina Amrane; Poncia Nyembo; Celine Roux-Byl; Thomas Pons; Simon Huppert

doi:10.1117/12.2653211

17 March 2023 Extremely large broadband emission of CdSe/CdS nanocrystals under high excitation

Agnès Maître, Damien Simonot, Lina Amrane, Poncia Nyembo, Celine Roux-Byl, Thomas Pons, Simon Huppert

Proceedings Volume PC12430, Quantum Sensing and Nano Electronics and Photonics XIX; PC1243019 (2023) https://doi.org/10.1117/12.2653211
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Single core/shell CdSe/CdS colloidal nanocrystals are usually used as efficient single photon sources working at room temperature, with a narrow spectrum of =30nm. For large shell, they evidence a strong resistance to high excitation and can withstand a few 106W/cm2,. Under high excitation their emission change dramatically, emission evolves non linearly with laser excitation power and the spectrum range can reach a few 100nm. In order to understand such a behavior, we use a statistical description of the electrons and holes population as fermi dirac distributions, followed by radiative recombination of excitons, which describes well experimental results.

Conference Presentation

Citation Download Citation

Agnès Maître, Damien Simonot, Lina Amrane, Poncia Nyembo, Celine Roux-Byl, Thomas Pons, and Simon Huppert "Extremely large broadband emission of CdSe/CdS nanocrystals under high excitation", Proc. SPIE PC12430, Quantum Sensing and Nano Electronics and Photonics XIX, PC1243019 (17 March 2023); https://doi.org/10.1117/12.2653211

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