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Fullerene

About: Fullerene is a research topic. Over the lifetime, 12723 publications have been published within this topic receiving 359173 citations.


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Journal ArticleDOI
01 Jan 1996-Carbon
TL;DR: In recent years, important advances in the understanding of the pressure-temperature phase and transformation diagram for carbon have occurred as a result of developments in both experimental and theoretical techniques as discussed by the authors.

580 citations

Journal ArticleDOI
TL;DR: This work clears a path towards higher PCEs in OPV devices by demonstrating that high-yield charge separation can occur with OPV systems that have a reduced donor/acceptor lowest unoccupied molecular orbital energy offset.
Abstract: A limiting factor of the power conversion efficiencies of organic photovoltaic devices is low voltage output Methano derivatives of the trimetallic endohedral fullerene Lu3N@C80 have now been synthesized and used as the acceptor in organic photovoltaics The open circuit voltage of the devices is significantly above those made using alternative fullerenes So far, one of the fundamental limitations of organic photovoltaic (OPV) device power conversion efficiencies (PCEs) has been the low voltage output caused by a molecular orbital mismatch between the donor polymer and acceptor molecules Here, we present a means of addressing the low voltage output by introducing novel trimetallic nitride endohedral fullerenes (TNEFs) as acceptor materials for use in photovoltaic devices TNEFs were discovered in 1999 by Stevenson et al 1; for the first time derivatives of the TNEF acceptor, Lu3N@C80, are synthesized and integrated into OPV devices The reduced energy offset of the molecular orbitals of Lu3N@C80 to the donor, poly(3-hexyl)thiophene (P3HT), reduces energy losses in the charge transfer process and increases the open circuit voltage (Voc) to 260 mV above reference devices made with [6,6]-phenyl-C61-butyric methyl ester (C60-PCBM) acceptor PCEs >4% have been observed using P3HT as the donor material This work clears a path towards higher PCEs in OPV devices by demonstrating that high-yield charge separation can occur with OPV systems that have a reduced donor/acceptor lowest unoccupied molecular orbital energy offset

577 citations

Book
01 Jan 1992
TL;DR: The main forms are diamond and graphite, and they exhibit markedly different properties from other forms of carbon as mentioned in this paper, such as the properties of carbon nanotubes and carbon nano-graphs.
Abstract: The performance of a single-crystal diamond detector, grown by chemical vapour deposition, as an energy (2) Pierson H. O., Handbook of Carbon, Graphite. Diamonds and Fullerenes: Processing, Properties. Applications. Handbook of carbon, graphite, diamond and fullerenes 1993 Pierson.pdf 4.72 MB Handbook of preparative inorganic chemistry 1963 Vol 1,2 Brauer.pdf. but in other areas, less-ordered graphitic or amorphous carbon shells were also Pierson, H. O. in Handbook of Carbon, Graphite, Diamond and Fullerenes:. At high temperature, Mg can reduce not only carbon in the oxidation state of +4 in Pierson, H. O. Handbook of carbon, graphite, diamonds and fullerenes:. nanotoxicity of carbon nanotubes and graphene in biomedicine. Pierson, H.O. Handbook of Carbon, Graphite, Diamond, and Fullerenes: Properties. Section 4 of the article is devoted towards discussing the role of carbon and its (7) H O Pierson, Handbook of carbon, graphite, diamonds and fullerenes:. The main forms are diamond and graphite, and they exhibit markedly di erent Books Handbook of Carbon, Graphite, Diamond and Fullerenes Properties. Four different forms of carbon namely, Graphite, Activated H. O. Pierson, Handbook of Carbon, Graphite, Diamonds and Fullerenes: Processing, Properties. The growth of multi-walled carbon nanotube (MWCNT) and carbon nano (13) H. O. Pierson, Handbook of Carbon, Graphite, Diamond and Fullerenes:.

575 citations

Journal ArticleDOI
TL;DR: In this article, the long-lived charge-transfer state of the C 60 -porphyrin dyad was successfully converted to photocurrent using a self-assembled monolayer technique.
Abstract: Redox-active fullerenes can be covalently bound to a variety of donors; their photophysical properties have been investigated. Their photochemical processes, including electron transfer and energy transfer, are varied, depending on the donor, linkage between the donor and C 60 , and solvent. Regardless of the solvent and linkage, the charge-separated state is produced efficiently in zinc porphyrin-C 60 systems, showing that C 60 is a good electron acceptor. The most intriguing characteristic of C 60 in electron transfer is that C 60 accelerates photoinduced charge separation and retards charge recombination in the dark. The long-lived charge-transfer state of the C 60 -porphyrin dyad was successfully converted to photocurrent using a self-assembled monolayer technique. These findings will provide a new strategy for the design and synthesis of artificial photosynthethic systems and photoactive materials using C 60 as a building block.

572 citations

Journal ArticleDOI
TL;DR: It is shown that geometrically well-defined graphene quantum dots can be synthesized on a ruthenium surface using C(60) molecules as a precursor, and Scanning tunnelling microscopy imaging suggests that the structures are formed through the ruthene-catalysed cage-opening of C( 60).
Abstract: The fragmentation of fullerenes using ions, surface collisions or thermal effects is a complex process that typically leads to the formation of small carbon clusters of variable size. Here, we show that geometrically well-defined graphene quantum dots can be synthesized on a ruthenium surface using C(60) molecules as a precursor. Scanning tunnelling microscopy imaging, supported by density functional theory calculations, suggests that the structures are formed through the ruthenium-catalysed cage-opening of C(60). In this process, the strong C(60)-Ru interaction induces the formation of surface vacancies in the Ru single crystal and a subsequent embedding of C(60) molecules in the surface. The fragmentation of the embedded molecules at elevated temperatures then produces carbon clusters that undergo diffusion and aggregation to form graphene quantum dots. The equilibrium shape of the graphene can be tailored by optimizing the annealing temperature and the density of the carbon clusters.

570 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023542
20221,244
2021366
2020346
2019411
2018420