Impact of molecular layer on emergent photovoltaic response in silicon unraveled by photoelectron spectroscopy

Ivashchuk, A.; Dusheiko, Mykhailo; Roshchina, N. N.; Смертенко, П. С.; Dimitriev, Oleg P.; Liu, Xianjie; Fahlman, Mats

doi:10.1016/j.apsusc.2020.148807

Cited by 4 publications

(3 citation statements)

References 54 publications

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“…Conversely, the surface of the Cu 2-x S@MSS NPs is charged negatively, as highlighted by the measured value of the ζ-potential, being −29.1 mV; therefore, other types of interaction rather than electrostatic should drive the formation of this hybrid structure. Due to the presence of the positively charged dye salt counterions, which can easily interact with the negatively charged mesoporous silica shell first [ 48 ], the particle surface becomes more neutral and less resistant to adsorption of the dye chromophore. The latter can be assembled on the silica shell via interaction of the dye sulfonate groups and silanol groups normally present on the silica surface [ 49 ].…”

Section: Resultsmentioning

confidence: 99%

Assembling Near-Infrared Dye on the Surface of Near-Infrared Silica-Coated Copper Sulphide Plasmonic Nanoparticles

et al. 2023

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Functionalization of colloidal nanoparticles with organic dyes, which absorb photons in complementary spectral ranges, brings a synergistic effect for harvesting additional light energy. Here, we show functionalization of near-infrared (NIR) plasmonic nanoparticles (NPs) of bare and amino-group functionalized mesoporous silica-coated copper sulphide (Cu2-xS@MSS and Cu2-xS@MSS-NH2) with specific tricarbocyanine NIR dye possessing sulfonate end groups. The role of specific surface chemistry in dye assembling on the surface of NPs is demonstrated, depending on the organic polar liquids or water used as a dispersant solvent. It is shown that dye binding to the NP surfaces occurs with different efficiency, but mostly in the monomer form in polar organic solvents. Conversely, the aqueous medium leads to different scenarios according to the NP surface chemistry. Predominant formation of the disordered dye monomers occurs on the bare surface of mesoporous silica shell (MSS), whereas the amino-group functionalized MSS accepts dye predominantly in the form of dimers. It is found that the dye–NP interaction overcomes the dye–dye interaction, leading to disruption of dye J-aggregates in the presence of the NPs. The different organization of the dye molecules on the surface of silica-coated copper sulphide NPs provides tuning of their specific functional properties, such as hot-band absorption and photoluminescence.

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Section: Resultsmentioning

confidence: 99%

Assembling Near-Infrared Dye on the Surface of Near-Infrared Silica-Coated Copper Sulphide Plasmonic Nanoparticles

et al. 2023

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“…SiO2 nanozarrachalari elektron qurilmalar, izolyator, kataliz va farmatsevtika kabi ko'plab sohalarda qo'llanilayotgani bilan bir qator ilmiy tadqiqotchilarning [8][9][10][11] e'tiborini o'ziga jalb qildi. Amorf holatdagi SiO2 zarrachalari elektron qoplamlar uchun taglik [12], yupqa qatlamli plonkalar [13], elektr izolyatorlari [14], issiqlik izolyatorlari [15] va namlik sensorlari [16] uchun keng qo'llaniladi. Ushbu mahsulotlatning ayrimlarining sifati, SiO2 zarralarining hajmi va ularning taqsimlanishiga bog'liq.…”

Section: -Yilunclassified

ZOL-GEL USULIDA SiO2 MIKROSFERIK ZARRACHALARNING SINTEZI

s¹,

u²

2023

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“…with potential applications in nanoscience such as molecular electronics [1][2][3][4], photonics [5][6][7][8][9] or spintronics [10][11][12]. In addition, porphyrins have molecular properties that can be tuned in several ways, for example by functionalization of the core macrocycle [13,14].…”

Section: Introductionmentioning

confidence: 99%

Realization of either physisorption or chemisorption of 2H-tetraphenylporphyrin on the Cu(111) from density functional theory

Naseri,

Abbas,

Johansson

et al. 2024

J. Phys.: Condens. Matter

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The adsorption of organic molecules to surfaces is a central issue to achieve fully-functional molecular devices, for which porphyrins are well-studied due to their chemical stability and functional diversity. Herein, we investigate both the physical and the chemical adsorption of the free-base tetraphenylporphyrin 2H-TPP on the Cu(111) surface within the framework of density functional theory and find that the most stable physisorbed configuration is more weakly bound by -0.36 eV than the chemisorbed configuration. We use the electron localization function to investigate the difference in binding mechanisms between strong physisorption and weak chemisorption. We have computed a reaction barrier of 0.12 eV in going from physical binding to chemical bonding to the surface, and a barrier of 50 meV in going between neighboring physical binding sites. Our results support the possibility of realizing free-base porphyrins either physisorbed or chemisorbed on Cu(111) depending on the deposition procedure and experimental conditions.

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Impact of molecular layer on emergent photovoltaic response in silicon unraveled by photoelectron spectroscopy

Cited by 4 publications

References 54 publications

Assembling Near-Infrared Dye on the Surface of Near-Infrared Silica-Coated Copper Sulphide Plasmonic Nanoparticles

Assembling Near-Infrared Dye on the Surface of Near-Infrared Silica-Coated Copper Sulphide Plasmonic Nanoparticles

ZOL-GEL USULIDA SiO2 MIKROSFERIK ZARRACHALARNING SINTEZI

Realization of either physisorption or chemisorption of 2H-tetraphenylporphyrin on the Cu(111) from density functional theory

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