Tuning the driving force for exciton dissociation in single-walled carbon nanotube heterojunctions

Ihly, Rachelle; Mistry, Kevin S.; Ferguson, Andrew J.; Clikeman, Tyler T.; Larson, Bryon W.; Reid, Obadiah G.; Boltalina, Olga V.; Strauss, Steven H.; Rumbles, Garry; Blackburn, Jeffrey L.

doi:10.1038/nchem.2496

Cited by 93 publications

(114 citation statements)

References 38 publications

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“…The LUMO level of C 60 was assumed using the reduction potential of fullerodendrimer (E 1 red = −1.12 V vs Fc/Fc + )29. The LUMO offset between SWCNTs and C 60 affects the efficiency of the electron transfer from SWCNTs to C 60 22. Because the C1 energy level of (7, 5) SWCNT is lower than that of (6, 5) and (8, 3) SWCNTs, PL emission quenching from (7, 5) SWCNT was not observed, which is in marked contrast to that from (6, 5) and (8,3)SWCNTs.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, Blackburn et al . described an optimum LUMO offset between SWCNTs and C 60 of approximately 130 meV, which is satisfied for small diameter nanotubes, such as (8, 3), (9, 1), or (6, 5)22. These circumstances prompt us to investigate the fabrication of photosensitizer/co-catalyst interconnecting systems having coaxial nanowire structures by employing small diameter SWCNTs.…”

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confidence: 99%

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SWCNT Photocatalyst for Hydrogen Production from Water upon Photoexcitation of (8, 3) SWCNT at 680-nm Light

Murakami

Tango

Miyake

et al. 2017

Sci Rep

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Single-walled carbon nanotubes (SWCNTs) are potentially strong optical absorbers with tunable absorption bands depending on their chiral indices (n, m). Their application for solar energy conversion is difficult because of the large binding energy (>100 meV) of electron-hole pairs, known as excitons, produced by optical absorption. Recent development of photovoltaic devices based on SWCNTs as light-absorbing components have shown that the creation of heterojunctions by pairing chirality-controlled SWCNTs with C60 is the key for high power conversion efficiency. In contrast to thin film devices, photocatalytic reactions in a dispersion/solution system triggered by the photoexcitation of SWCNTs have never been reported due to the difficulty of the construction of a well-ordered surface on SWCNTs. Here, we show a clear-cut example of a SWCNT photocatalyst producing H2 from water. Self-organization of a fullerodendron on the SWCNT core affords water-dispersible coaxial nanowires possessing SWCNT/C60 heterojunctions, of which a dendron shell can act as support of a co-catalyst for H2 evolution. Because the band offset between the LUMO levels of (8, 3)SWCNT and C60 satisfactorily exceeds the exciton binding energy to allow efficient exciton dissociation, the (8, 3)SWCNT/fullerodendron coaxial photocatalyst shows H2-evolving activity (QY = 0.015) upon 680-nm illumination, which is E22 absorption of (8, 3) SWCNT.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

SWCNT Photocatalyst for Hydrogen Production from Water upon Photoexcitation of (8, 3) SWCNT at 680-nm Light

Murakami

Tango

Miyake

et al. 2017

Sci Rep

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“…To this end, SWCNTs have emerged as a potential replacement for i) fullerene compounds acting as an electron accepter, ii) polymer acting as an electron donor, iii) hole extraction layers, and iv) transparent electrodes . However, the variability in nanotube electronic structure has been proven to have detrimental effect on the photovoltaic performance and the lifetime of charge carriers .…”

Section: Applications Of Sorted Carbon Nanotubesmentioning

confidence: 99%

Recent Advances in Applications of Sorted Single‐Walled Carbon Nanotubes

Bati

Batmunkh

et al. 2019

Adv Funct Materials

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Single-walled carbon nanotubes (SWCNTs) exhibit outstanding properties that make them appealing in a wide range of applications. However, their properties are variable depending on the tube helicity (chirality), which has been a challenge for a long time and needs to be effectively controlled. In recent years, tremendous efforts have been made to control the electrical type/chirality of nanotubes through both direct controlled synthesis and postsynthesis separation methods. Driven by these breakthroughs, the applications of separated families of SWCNTs in various fields have emerged as a new topic of research. In this Review, an overview of recent advances in the use of highly purified and well-separated SWCNTs in a comprehensive range of applications is presented including photovoltaics, transistors, batteries, sensors, light emitters, biological/medical fields, and others. Finally, important future directions for the utilization of separated SWCNTs in these fields are provided.

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“…[166] A recent spectroscopic study by Ihly et al revealed that there can be a very strong driving force for efficient photoinduced electron transfer between SWNTs and particular fullerene derivatives, suggesting that further improvements to these systems could also be achieved by judicious choice of fullerene derivatives. [167]…”

Section: Groupmentioning

confidence: 99%

Functional Single‐Walled Carbon Nanotubes and Nanoengineered Networks for Organic‐ and Perovskite‐Solar‐Cell Applications

Barbero

Stranks

2016

Advanced Materials

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Carbon nanotubes have a variety of remarkable electronic and mechanical properties that, in principle, lend them to promising optoelectronic applications. However, the field has been plagued by heterogeneity in the distributions of synthesized tubes and uncontrolled bundling, both of which have prevented nanotubes from reaching their full potential. Here, a variety of recently demonstrated solution-processing avenues is presented, which may combat these challenges through manipulation of nanoscale structures. Recent advances in polymer-wrapping of single-walled carbon nanotubes (SWNTs) are shown, along with how the resulting nanostructures can selectively disperse tubes while also exploiting the favorable properties of the polymer, such as light-harvesting ability. New methods to controllably form nanoengineered SWNT networks with controlled nanotube placement are discussed. These nanoengineered networks decrease bundling, lower the percolation threshold, and enable a strong enhancement in charge conductivity compared to random networks, making them potentially attractive for optoelectronic applications. Finally, SWNT applications, to date, in organic and perovskite photovoltaics are reviewed, and insights as to how the aforementioned recent advancements can lead to improved device performance provided.

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Tuning the driving force for exciton dissociation in single-walled carbon nanotube heterojunctions

Cited by 93 publications

References 38 publications

SWCNT Photocatalyst for Hydrogen Production from Water upon Photoexcitation of (8, 3) SWCNT at 680-nm Light

SWCNT Photocatalyst for Hydrogen Production from Water upon Photoexcitation of (8, 3) SWCNT at 680-nm Light

Recent Advances in Applications of Sorted Single‐Walled Carbon Nanotubes

Functional Single‐Walled Carbon Nanotubes and Nanoengineered Networks for Organic‐ and Perovskite‐Solar‐Cell Applications

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