ArticleScientific reports2014
Optical spectrum of bottom-up graphene nanoribbons: towards efficient atom-thick excitonic solar cells.
Article in Scientific reports, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Emissive brightening in molecular graphene nanoribbons by twilight states.Nature communications · 2024Article
- Fermi-Level Engineering of Nitrogen Core-Doped Armchair Graphene Nanoribbons.Journal of the American Chemical Society · 2023Article
- Role Played by Edge-Defects in the Optical Properties of Armchair Graphene Nanoribbons.Nanomaterials (Basel, Switzerland) · 2021Article
- Width Dependent Elastic Properties of Graphene Nanoribbons.Materials (Basel, Switzerland) · 2021Article
- Exciton-exciton annihilation and biexciton stimulated emission in graphene nanoribbons.Nature communications · 2016Article
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Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Recently, atomically well-defined cove-shaped graphene nanoribbons have been obtained using bottom-up synthesis. These nanoribbons have an optical gap in the visible range of the spectrum which make them candidates for donor materials in photovoltaic devices. From the atomistic point of view, their electronic and optical properties are not clearly understood. Therefore, in this work we carry out ab-initio density functional theory calculations combine with many-body perturbation formalism to study their electronic and optical properties. Through the comparison with experimental measurements, we show that an accurate description of the nanoribbon's optical properties requires the inclusion of electron-hole correlation effects. The energy, binding energy and the corresponding excitonic transitions involved are analyzed. We found that in contrast to zigzag graphene nanoribbons, the excitonic peaks in the absorption spectrum are a consequence of a group of transitions involving the first and second conduction and valence bands. Finally, we estimate some relevant optical properties that strengthen the potential of these nanoribbons for acting as a donor materials in photovoltaic.
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Registered trials
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