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SM ISO690:2012 SURRENTE, Alessandro, MITIOGLU, Anatolie, GALKOWSKI , Krzysztof, KLOPOTOWSKI, Lukasz, TABIS, Wojciech, VIGNOLLE, Baptiste, MAUDE, Duncan Kennedy, PŁOCHOCKA, Paulina. Onset of exciton-exciton annihilation in single-layer black phosphorus. In: Physical Review B, 2016, vol. 94, pp. 1-6. ISSN 2469-9950. DOI: https://doi.org/10.1103/PhysRevB.94.075425 |
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Physical Review B | |
Volumul 94 / 2016 / ISSN 2469-9950 /ISSNe 2469-9969 | |
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DOI:https://doi.org/10.1103/PhysRevB.94.075425 | |
Pag. 1-6 | |
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Rezumat | |
The exciton dynamics in monolayer black phosphorus is investigated over a very wide range of photoexcited exciton densities using time resolved photoluminescence. At low excitation densities, the exciton dynamics is successfully described in terms of a double exponential decay. With increasing exciton population, a fast, nonexponential component develops as exciton-exciton annihilation takes over as the dominant recombination mechanism under high excitation conditions. Our results identify an upper limit for the injection density, after which exciton-exciton annihilation reduces the quantum yield, which will significantly impact the performance of light emitting devices based on single-layer black phosphorus. |
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Cuvinte-cheie Double exponential, Excitation conditions, Excitation density, Exciton-exciton annihilation, Injection density, Light emitting devices, Recombination mechanisms, Time-resolved photoluminescence |
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