Coupling effect on charge‐transfer mechanism of surface‐enhanced resonance Raman scattering

Li, Quanjiang; Wang, Jingang; Ding, Qianqian; Chen, Maodu; Ma, Fang

doi:10.1002/jrs.5077

Cited by 15 publications

(13 citation statements)

References 59 publications

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“…The different ways of coupling not only result in different degrees of charge transfer on electronic transitions, but also can cause different intensity of charge‐transfer absorption peaks. Both ways strongly influence the enhancement of charge‐transfer mechanism of SERRS . Machado et al presented a study of anomalous SERS from aromatic aldehydes and carboxylic acids.…”

Section: Surface‐enhanced Raman Spectroscopymentioning

confidence: 67%

“…The 26th International Conference on Raman Spectroscopy (ICORS 2018) was held in Jeju Island, Korea from August [26][27][28][29][30][31]2018. Jeju is an island south of the Korean peninsula with a warm tropical climate.…”

Section: Icors 2018mentioning

confidence: 99%

“…Both ways strongly influence the enhancement of chargetransfer mechanism of SERRS. [28] Machado et al presented a study of anomalous SERS from aromatic aldehydes and carboxylic acids. In the SERS spectra of two aldehydes, the band corresponding to the ν(C¼O) stretching mode of the carboxaldehyde group at approximately 1,700 cm -1 is missing, whereas a new band at 1,350-1,400 cm -1 characteristic of the symmetric stretching mode of the carboxylate group appears in both cases.…”

Section: Sers Substratesmentioning

confidence: 99%

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Recent advances in linear and nonlinear Raman spectroscopy. Part XII

Nafie

2018

J Raman Spectroscopy

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This annual review is an overview of advances in the field of Raman spectroscopy as found in papers published in the previous calendar year in the Journal of Raman Spectroscopy (JRS), as well as in trends over the past decade across journals that have published papers important to the field of Raman spectroscopy. This information is gleaned from statistical data on article counts obtained from the Clarivate Analytic's Web of Science Core Collection by year and by subfield of Raman spectroscopy. Additional information is gleaned from presentations at the XXVI International Conference on Raman Spectroscopy (ICORS 2018) in Jeju Island, Korea in August 2018, and contributions on Raman scattering at SCIX 2018, organized by the Federation of Analytical Chemistry and Spectroscopy Societies (FACSS) in Atlanta, Georgia, USA in October 2018. Coverage is also provided for topics from the European Conference on Nonlinear Optical Spetroscopy (ECONOS 2018) held in April in Milan, Italy and GeoRaman 2018 in Catania, Italy in June. Finally, papers published in JRS in 2017 are highlighted and arranged by topics at the frontier of Raman spectroscopy. On the basis of this survey information, it is clear that Raman spectroscopy continues as in recent years as a rapidly expanding field of research across a wide range of novel disciplines and applications that provide sensitive photonic information of matter at the molecular level.

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Section: Surface‐enhanced Raman Spectroscopymentioning

confidence: 67%

Section: Icors 2018mentioning

confidence: 99%

Section: Sers Substratesmentioning

confidence: 99%

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Recent advances in linear and nonlinear Raman spectroscopy. Part XII

Nafie

2018

J Raman Spectroscopy

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“…DFT calculations was used to study photosensitizing features [55] and photophysical properties of expanded bacteriochlorins [56], where micromechanism of photosensitizing nature was revealed with DFT calculations. In addition, the three-dimensional (3D) real-space analysis method was used to describe the charge transfer process in the excited states [57][58][59][60]. All calculations were performed using Gaussian 09 package [61].…”

Section: Methodsmentioning

confidence: 99%

Structure and Photoelectrical Properties of Natural Photoactive Dyes for Solar Cells

et al. 2018

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A series of natural photoactive dyes, named as D1–D6 were successfully extracted from six kinds of plant leaves for solar cells. The photoelectrical properties of dyes were measured via UV-Vis absorption spectra, cyclic voltammetry as well as photovoltaic measurement. To theoretically reveal the experimental phenomena, the chlorophyll was selected as the reference dye, where the ground and excited state properties of chlorophyll were calculated via density functional theory (DFT) and time-dependent density functional theory (TD-DFT). The experimental results show that the absorption peaks of those dyes are mainly distributed in the visible light regions of 400–420 nm and 650–700 nm, which are consistent with the absorption spectrum of chlorophyll. The photoelectrical conversion efficiencies of the solar cells sensitized by the six kinds of natural dyes are in the order of D1 > D4 > D2 > D5 > D6 > D3. The dye D1 performance exhibits the highest photoelectrical conversion efficiency of 1.08% among the investigated six natural dyes, with an open circuit voltage of 0.58 V, a short-circuit current density of 2.64 mA cm−2 and a fill factor of 0.70.

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“…One of primary mechanisms of surface-enhanced Raman scattering (SERS) is chemical enhancement that involves photoinduced charge transfer between inhomogeneous substances 26 . Photoinduced charge transfer can be the dominant contribution to the surface-enhanced Raman signal on the semiconductor substrate 27 .…”

Section: Introductionmentioning

confidence: 99%

Graphene/PbS quantum dot hybrid structure for application in near-infrared photodetectors

Jeong

Song

Jeong

et al. 2020

Sci Rep

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A graphene-PbS quantum dot (QD) composite for application in high-performance near-infrared (NIR) photodetectors (PDs) is proposed in this study. A single-layer graphene flake and oleic acid-capped PbS QD composite is fabricated through the conventional sonication process, in hexane solution. Field emission scanning electron microscopy images of the graphene-PbS QD composite dispersed on a glass substrate confirm that the composite contains both aggregated graphene flakes and single-layer graphene with wrinkles; Transmission electron microscopy images reveal close packing with uniform size. The increased absorbance and quenched photoluminescence intensity of the graphene-PbS QD composite supports enhanced photoinduced charge transfer between graphene and the PbS QDs. Moreover, the specific Raman mode of the PbS QDs, embedded in the spectrum, is enhanced by combination with graphene, which can be interpreted by SERS as relevant to the photoinduced charge transfer between the Pbs QDs and graphene. For device application, a PD structure comprised by graphene-PbS QDs is fabricated. The photocurrent of the PD is measured using a conventional probe station with a 980-nm NIR laser diode. In the fabricated PD comprising graphene-PbS QDs, five-times higher photocurrent, 22% faster rise time, and 47% faster decay time are observed, compared to that comprising PbS QDs alone. This establishes the potential of the graphene-PbS QD composite for application in ultrathin, flexible, high-performance NIR PDs.

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Coupling effect on charge‐transfer mechanism of surface‐enhanced resonance Raman scattering

Cited by 15 publications

References 59 publications

Recent advances in linear and nonlinear Raman spectroscopy. Part XII

Recent advances in linear and nonlinear Raman spectroscopy. Part XII

Structure and Photoelectrical Properties of Natural Photoactive Dyes for Solar Cells

Graphene/PbS quantum dot hybrid structure for application in near-infrared photodetectors

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