The DOI matches its Crossref record; 40 of the 40 references it cites were found in a registry or an index.
The Impact of Functionalization on the Stability, Work Function, and Photoluminescence of Reduced Graphene Oxide
Abstract
Reduced graphene oxide (rGO) is a promising material for a variety of thin-film optoelectronic applications. Two main barriers to its widespread use are the lack of (1) fabrication protocols leading to tailored functionalization of the graphene sheet with oxygen-containing chemical groups, and (2) understanding of the impact of such functional groups on the stability and on the optical and electronic properties of rGO. We carry out classical molecular dynamics and density functional theory calculations on a large set of realistic rGO structures to decompose the effects of different functional groups on the stability, work function, and photoluminescence. Our calculations indicate the metastable nature of carbonyl-rich rGO and its favorable transformation to hydroxyl-rich rGO at room temperature via carbonyl-to-hydroxyl conversion reactions near carbon vacancies and holes. We demonstrate a significant tunability in the work function of rGO up to 2.5 eV by altering the composition of oxygen-containing functional groups for a fixed oxygen concentration, and of the photoluminescence emission by modulating the fraction of epoxy and carbonyl groups. Taken together, our results guide the application of tailored rGO structures in devices for optoelectronics and renewable energy.
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Self-citation
Metadata
- Authors
- Kumar, P. V., Bernardi, M., & Grossman, J. C.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-01-31
- Volume
- 7
- Issue
- 2
- Pages
- 1638-1645
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2142635559
- Cited by
- 287
- References
- 40
- FWCI
- 11.40
- Type
- journal article
- Language
- en
- Open access
- closed
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