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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | University of Brasilia, Institute of Physics | - |
Autor(es): dc.contributor | Technical University of Denmark, Department of Energy Conversion and Storage | - |
Autor(es): dc.contributor | University of Brasilia, Institute of Physics | - |
Autor(es): dc.contributor | University of Brasilia, Institute of Physics | - |
Autor(es): dc.contributor | University of Brasilia, Institute of Physics | - |
Autor(es): dc.creator | Cassiano, Tiago de Sousa Araújo | - |
Autor(es): dc.creator | Sousa, Leonardo Evaristo de | - |
Autor(es): dc.creator | Ribeiro Júnior, Luiz Antônio | - |
Autor(es): dc.creator | Silva, Geraldo Magela e | - |
Autor(es): dc.creator | Oliveira Neto, Pedro Henrique de | - |
Data de aceite: dc.date.accessioned | 2024-10-23T16:06:23Z | - |
Data de disponibilização: dc.date.available | 2024-10-23T16:06:23Z | - |
Data de envio: dc.date.issued | 2023-11-20 | - |
Data de envio: dc.date.issued | 2023-11-20 | - |
Data de envio: dc.date.issued | 2022-03-17 | - |
Fonte completa do material: dc.identifier | http://repositorio2.unb.br/jspui/handle/10482/46884 | - |
Fonte completa do material: dc.identifier | https://doi.org/10.1016/j.synthmet.2022.117056 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/capes/899935 | - |
Descrição: dc.description | Previous reports indicate that cove-type graphene nanoribbons (CGNR) may present high intrinsic charge mobility of almost 15,000 cm2/Vs. Still, with experimental estimates varying from 150 to 15,000 cm2/Vs. Typically, theoretical mobilities are obtained from methods such as the Drude-Smith model, which tends to neglect the electron-phonon coupling mechanism, or the Boltzmann transport equation, that considers only acoustic phonons. As such, more thorough approaches are needed. In this work, we simulated charge transport in 4-CGNR by explicitly contemplating the lattice collective behavior. The nanoribbon is simulated by a two-dimensional Su-Schrieffer-Heeger (SSH) tight-binding model with electron-phonon coupling and considering all phonon modes. Results show the rise of two quasiparticles: polaron and bipolaron. We probed their dynamical properties by including the presence of an external electric field. Findings indicate that each carrier has a characteristic transport regime that is deeply related to phonon collision interactions. Model derived mobilities for polarons and bipolarons reach up to 18,000 cm2/Vs and 1500 cm2/Vs, respectively. Furthermore, calculations reveal the carriers to be highly efficient charge transporters, with a field independent low effective mass and notable mobility, delivering a better performance than other narrow GNRs. All presented features place the CGNR as a potential base material of future high-quality organic-based optoelectronic devices. The work also contributes to the theoretical understanding of transport physics in highly confined materials. | - |
Descrição: dc.description | Instituto de Física (IF) | - |
Formato: dc.format | application/pdf | - |
Idioma: dc.language | en | - |
Publicador: dc.publisher | Elsevier B.V. | - |
Direitos: dc.rights | Acesso Aberto | - |
Direitos: dc.rights | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | - |
Palavras-chave: dc.subject | Grafeno | - |
Palavras-chave: dc.subject | SSH | - |
Palavras-chave: dc.subject | Polaron | - |
Palavras-chave: dc.subject | Bipolaron | - |
Palavras-chave: dc.subject | Transporte de carga | - |
Palavras-chave: dc.subject | Nanofitas de grafeno | - |
Título: dc.title | Charge transport in cove-type graphene nanoribbons : the role of quasiparticles | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional – UNB |
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