Efficient hot-electron transfer by a plasmon-induced interfacial charge-transfer transition

Wu, Kaifeng; Chen, Jacqueline; McBride, James R.; Lian, Tianquan

doi:10.1126/science.aac5443

Cited by 1,018 publications

(1,191 citation statements)

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“…In addition, a better understanding of the hot carrier relaxation timescale [75,117,[159][160][161] in various materials as well as the transport dynamics in nanostructures would provide more valuable information for designing plasmonic devices with efficient hot carrier transport to the Schottky interface. Lastly, engineering the metal-semiconductor interface on the atomic level could also lead to improved hot electron transfer efficiencies [157,162]. For A B instance, a recent report describing hot electron transfer by a plasmon-induced interfacial charge-transfer transition has shown an internal quantum efficiency up to 20% independent of incident photon energy [157].…”

Section: -156mentioning

confidence: 99%

“…Lastly, engineering the metal-semiconductor interface on the atomic level could also lead to improved hot electron transfer efficiencies [157,162]. For A B instance, a recent report describing hot electron transfer by a plasmon-induced interfacial charge-transfer transition has shown an internal quantum efficiency up to 20% independent of incident photon energy [157].…”

Section: -156mentioning

confidence: 99%

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Harvesting the loss: surface plasmon-based hot electron photodetection

2016

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Abstract:Although the nonradiative decay of surface plasmons was once thought to be only a parasitic process within the plasmonic and metamaterial communities, hot carriers generated from nonradiative plasmon decay offer new opportunities for harnessing absorption loss. Hot carriers can be harnessed for applications ranging from chemical catalysis, photothermal heating, photovoltaics, and photodetection. Here, we present a review on the recent developments concerning photodetection based on hot electrons. The basic principles and recent progress on hot electron photodetectors are summarized. The challenges and potential future directions are also discussed.

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Section: -156mentioning

confidence: 99%

Section: -156mentioning

confidence: 99%

Harvesting the loss: surface plasmon-based hot electron photodetection

2016

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“…10 They proposed the PICTT mechanism, which is different from conventional plasmon-induced hot-electron transfer (PHET) or direct metal-to-semiconductor interfacial charge-transfer transition (DICTT). In PICTT, the metal plasmon serves as a light absorber, but strong interdomain coupling and mixing of the metal and semiconductor levels lead to a new plasmon decay pathway-the direct generation of an electron in the semiconductor and an electronhole pair in the metal without the generation of hot electrons ( Figure 9).…”

Section: Mechanism Revealed By Ultrafast Spectroscopymentioning

confidence: 99%

“…[6][7][8] Interestingly, as a mechanism of electron transfer from plasmonic metals to semiconductors alternative to hot-electron transfer, chemical interface dumping, in which plasmons decay through a direct electron-separation channel at the interface, has been postulated. [9][10][11] A decade ago, we realized the potential of Au NPs to act as electron donors to TiO 2 NPs when in close contact. Hence, Au NPs can be viewed as photosensitizers instead of commonly employed dyes in dye-sensitized solar cells.…”

Section: Introductionmentioning

confidence: 99%

Insight into plasmonic hot-electron transfer and plasmon molecular drive: new dimensions in energy conversion and nanofabrication

2017

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Localized surface plasmon resonance (LSPR) of plasmonic nanoparticles and nanostructures has attracted wide attention because the nanoparticles exhibit a strong near-field enhancement through interaction with visible light, enabling subwavelength optics and sensing at the single-molecule level. The extremely fast LSPR decays have raised doubts that such nanoparticles have use in photochemistry and energy storage. Recent studies have demonstrated the capability of such plasmonic systems in producing LSPR-induced hot electrons that are useful in energy conversion and storage when combined with electron-accepting semiconductors. Due to the femtosecond timescale, hot-electron transfer is under intense investigation to promote ongoing applications in photovoltaics and photocatalysis. Concurrently, hot-electron decay results in photothermal responses or plasmonic heating. Importantly, this heating has received renewed interest in photothermal manipulation, despite the developments in optical manipulation using optical forces to move and position nanoparticles and molecules guided by plasmonic nanostructures. To realize plasmonic heating-based manipulation, photothermally generated flows, such as thermophoresis, the Marangoni effect and thermal convection, are exploited. Plasmon-enhanced optical tweezers together with plasmon-induced heating show potential as an ultimate bottom-up method for fabricating nanomaterials. We review recent progress in two fascinating areas: solar energy conversion through interfacial electron transfer in gold-semiconductor composite materials and plasmon-induced nanofabrication.

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“…The structure engineering brought increased surface areas as well as an improved charge-transfer process and a unique optical phenomenon, surface plasmon effect, when it associated with additional nanomaterials such as metal nanoparticles on the metal oxide nanostructure. 62,63 Commonly, high density electron clouds are generated at the surface of the metal nanoparticle when external wavelength, which is larger than the particle size, is stimulated. 64,65 In other word, a large electromagnetic enhancement can be occurred near interacting metal nanoparticles.…”

Section: Mechanisms Of the Enhanced Photoelectrochemical Property Formentioning

confidence: 99%

Perspective—A Brief Perspective on the Fabrication of Hierarchical Nanostructure for Solar Water Splitting Photoelectrochemical Cells

Kwon

Cho

Lee

et al. 2018

ECS J. Solid State Sci. Technol.

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Among various solar energy generation methods, a water splitting photoelectrochemical (PEC) cell have been anticipated as a one of the promising source to generate hydrogen by natural sunlight. Owing to unique electrical, electrochemical and optical properties, the nanostructured metal oxides were intensively investigated to adopt as a main material in the water splitting PEC cell. However, most of nanostructured metal oxides have an improper bandgap size/position for splitting water molecule, it needs to be engineered to shift a level of the energy bandgap. In this prospective review, we will briefly discuss solution-processed fabrication methods for water splitting applications. Current StatusSunlight-driven energy generation systems have been broadly studied to establish a clean and sustainable energy source. Water splitting photoelectrochemical (PEC) cell is one of the next-generation hydrogen generation technology.1-3 Since metal oxides have unique electrical, electrochemical and optical properties, it usually was adopted as a main material for the water splitting PEC cell. At this time, the metal oxides were fabricated to have nanoscale structure. Typically, the nanostructured materials have different chemical, electrical and optical characteristics, largely depended on the size. 4 One of the featured characteristics for the nanoscale materials is large surface to volume ratio, which indicates that it offers many chemical reaction sites. Moreover, the nanostructured materials own minimized defects and shortened migration distance for electrons/holes, which decreases electron-hole recombination and eventually leads high photoresponse efficiency.5 Nanomaterials were engineered as various shapes and structures such as thin film, 6 porous frameworks, 7,8 nature-mimicked branched systems 9,10 and hierarchical structures 11,12 to obtain maximize surface areas. Among the various structures, the hierarchical metal oxide nanostructure has been broadly studied for the electrochemical applications due to a simple structure form as well as a capability of modulation for the electrical property. Regarding the hierarchical structure is basically consisted of an inner core and an outer surrounding, the core material fabrication process firstly needs to be determined. At the early stage of research, metal oxide-based hierarchical nanostructures were generally synthesized via vapor-liquid-solid process, mostly conducted under vacuum environment. However, several pioneer researchers have introduced a hybrid fabrication process using both dry and wet methods to get hierarchical nanostructure. Synthesis of Metal Oxide Nanostructure by Hydrothermal Process for Water Splitting ApplicationsOver several decades, nanostructured metal oxides were synthesized by various vacuum-based synthesis methods such as evaporator, 13,14 sputtering, 15 chemical vapor deposition (CVD), [16][17][18][19] pulsed laser deposition (PLD) 20 and other techniques. Recently, a hydrothermal reaction was practiced to make metal oxide nanostructure z E-mai...

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Efficient hot-electron transfer by a plasmon-induced interfacial charge-transfer transition

Cited by 1,018 publications

References 73 publications

Harvesting the loss: surface plasmon-based hot electron photodetection

Harvesting the loss: surface plasmon-based hot electron photodetection

Insight into plasmonic hot-electron transfer and plasmon molecular drive: new dimensions in energy conversion and nanofabrication

Perspective—A Brief Perspective on the Fabrication of Hierarchical Nanostructure for Solar Water Splitting Photoelectrochemical Cells

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