Utilize este identificador para referenciar este registo: http://hdl.handle.net/10362/128327
Título: Light management with quantum nanostructured dots-in-host semiconductors
Autor: Alexandre, Miguel
Águas, Hugo
Fortunato, Elvira
Martins, Rodrigo
Mendes, Manuel João
Palavras-chave: Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Data: Dez-2021
Resumo: Insightful knowledge on quantum nanostructured materials is paramount to engineer and exploit their vast gamut of applications. Here, a formalism based on the single-band effective mass equation was developed to determine the light absorption of colloidal quantum dots (CQDs) embedded in a wider bandgap semiconductor host, employing only three parameters (dots/host potential barrier, effective mass, and QD size). It was ascertained how to tune such parameters to design the energy level structure and consequent optical response. Our findings show that the CQD size has the biggest effect on the number and energy of the confined levels, while the potential barrier causes a linear shift of their values. While smaller QDs allow wider energetic separation between levels (as desired for most quantum-based technologies), the larger dots with higher number of levels are those that exhibit the strongest absorption. Nevertheless, it was unprecedently shown that such quantum-enabled absorption coefficients can reach the levels (104–105cm−1) of bulk semiconductors. [Figure not available: see fulltext.]
Descrição: PTCD/NAN-OPT/28837/2017
Peer review: yes
URI: http://hdl.handle.net/10362/128327
DOI: https://doi.org/10.1038/s41377-021-00671-x
ISSN: 2095-5545
Aparece nas colecções:Home collection (FCT)

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