2D gold supercrystal-MoS2 hybrids: Photoluminescence quenching

Yin, Hang; Hu, Dafeng; Geng, Xuemin; Liu, Hu; Wan, Yanfen; Guo, Zhanhu; Yang, Peng

doi:10.1016/j.matlet.2019.126531

Cited by 29 publications

(10 citation statements)

References 12 publications

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“…Previous studies have shown Raman enhancement of MoS 2 with different metal NPs, like Ga, CuPc, and Au NPs. ,, Catalán-Gómez et al . showed the Raman intensification of E 2g and A 1g bands with EFs of 6.1 and 3, respectively, due to plasmonic coupling between MoS 2 and Ga NPs.…”

Section: Resultsmentioning

confidence: 96%

“…Previous studies have shown Raman enhancement of MoS 2 with different metal NPs, like Ga, CuPc, and Au NPs. 58,88,89 Catalań-Goḿez et al 58 showed the Raman intensification of E 2g and A 1g bands with EFs of 6.1 and 3, respectively, due to plasmonic coupling between MoS 2 and Ga NPs. Mukherjee et al 90 also reported on the Raman enhancement of ML MoS 2 with Au nanocones due to an increase in background Raman scattering counts, which could be due to plasmonic-induced enhancement of the average field intensity distribution in ML MoS 2 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Enhancement of Raman Scattering and Exciton/Trion Photoluminescence of Monolayer and Few-Layer MoS₂ by Ag Nanoprisms and Nanoparticles: Shape and Size Effects

et al. 2021

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The metal nanoparticle size and shape impact the plasmonic enhancement of Raman and photoluminescence (PL) spectra of monolayer and few-layer MoS2 decorated with them. The plasmonic enhancement is investigated for Ag nanotriangles (NTs or nanoprisms) of different sizes in comparison to Ag nanospheres (NSs) at room temperature. After the decoration with Ag NTs, the intensity of both Raman modes of MoS2 increases up to 6.8 times. The μ-PL spectra of bare MoS2 show the presence of the A and B exciton bands as well as of a weak trion component. After covering the flakes with 50 nm Ag NTs, the highest integrated PL enhancement factors are 2.9 and 2.1 under 532 and 405 nm excitations, respectively. The revealed shape effect is that Ag NTs provide much stronger Raman and exciton emission enhancement than Ag NSs, which is due to the generation of plasmonic hot spots near the sharp edges and tips of NTs. Another mechanism of enhancement is the plasmonic coupling between the neighboring Ag NTs that causes the generation of hot spots in the gap between NTs. The revealed size effect is a decrease of Raman and PL enhancement with an increase in size of Ag NTs or NSs, which is due to an increase in radiative damping of plasmon oscillation occurring with an increase in nanoparticle size. The important feature is a strong enhancement of the A– trion component after decorating MoS2 with Ag nanoparticles. The phenomenon may be explained by the surface-plasmon-mediated generation of hot electrons in Ag nanostructures, which then inject to MoS2 flakes. This work gives new fundamental insights into the physical mechanisms of light–matter coupling in hybrid two-dimensional (2D) semiconductor/plasmonic nanoparticle structures, which are highly promising for next-generation optoelectronic and nanophotonic devices.

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Section: Resultsmentioning

confidence: 96%

Section: ■ Results and Discussionmentioning

confidence: 99%

Enhancement of Raman Scattering and Exciton/Trion Photoluminescence of Monolayer and Few-Layer MoS₂ by Ag Nanoprisms and Nanoparticles: Shape and Size Effects

et al. 2021

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“…Furthermore, PSCs suffer from performance degradation when operating at elevated temperatures, owing to the interface deterioration by the chemical reaction between the migrated iodide ions and the metal electrode. , Therefore, tailoring multiple interfaces is of great importance to obtain high-performing PSCs. During the past decade, graphene and derivatives have drawn a lot of attention because of their exceptional physical and chemical properties and shown promising applications in PSCs. − However, the incorporation of nitrogen and sulfur element co-doping graphene quantum dots (NSGQDs) into PSCs to simultaneously achieve multiple interface engineering for obtaining high efficiency and durable solar cells has not been reported to date.…”

Section: Introductionmentioning

confidence: 99%

Boosting Multiple Interfaces by Co-Doped Graphene Quantum Dots for High Efficiency and Durability Perovskite Solar Cells

Chen

Luo

Liu

et al. 2020

ACS Appl. Mater. Interfaces

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Organic–inorganic hybrid perovskite solar cells (PSCs), as the most rapidly developing next-generation thin-film photovoltaic technology, have attracted extensive research interest, yet their efficiency, scalability, and durability remain challenging. α-Fe2O3 could be used as an electron transporting layer (ETL) of planar PSCs, which exhibits a much higher humidity and UV light-stability compared to TiO2-based planar PSCs. However, the photovoltaic conversion efficiency (PCE) of the Fe2O3-based device was still below 15% because of poor interface contact between α-Fe2O3 and perovskite and poor crystal quality of perovskites. In this work, we have engineered the interfaces throughout the entire solar cell via incorporating N, S co-doped graphene quantum dots (NSGQDs). The NSGQDs played remarkable multifunctional roles: (i) facilitated the perovskite crystal growth; (ii) eased charge extraction at both anode and cathode interfaces; and (iii) induced the defect passivation and suppressed the charge recombination. When assembled with a α-Fe2O3 ETL, the planar PSCs exhibited a significantly increased efficiency from 14 to 19.2%, with concomitant reductions in hysteresis, which created a new record of the PCE for Fe2O3-based PSCs to date. In addition, PSCs with the entire device interfacial engineering showed an obviously improved durability, including prominent humidity, UV light, and thermal stabilities. Our interfacial engineering methodology via graphene quantum dots represents a versatile and effective way for building high efficiency as well as durable PSCs.

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“…Here, the black silicon surfaces were created by metal-assisted chemical etching with gold utilized as catalyst. Moreover, transition metal dichalcogenides (TMDs), such as molybdenum disulfide (MoS 2 ), − and black phosphorus and the like, have great potential in the future of optoelectronics because of their unique structure and novel electronic and optical properties.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Absorption in the Wide Wavelength Range: Black Silicon Decorated with Few-Layer PtS₂

Zhuang

Yang

et al. 2021

J. Phys. Chem. C

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Ultrablack materials are distinguished by their extremely low reflectivity and high absorptivity, which can be used to increase photovoltaic cell efficiency, capture stray light, and design radar camouflage. Black silicon is a type of ultrablack material, the absorptivity of which still has room for improvement. Here, nanostructured black silicon is prepared by a metal-assisted chemical etching method, in which chloroauric acid (HAuCl4) acts as the catalyst. Furthermore, the study demonstrates that due to the deposition of a few layers of PtS2 the number of “hot spots” between the sidewall gaps of bamboo shoot-like protrusions is significantly increased, thereby further improving the absorption of black silicon and enhancing light suppression. The few-layer PtS2 was densely grown on the black silicon by combining the physical vapor deposition (PVD) and the chemical vapor deposition (CVD) methods. Next, the enhanced Raman property of black silicon was explored. These results provide a new idea for the manufacture of excellent photovoltaic and optoelectronic devices in which very high absorption is necessary.

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2D gold supercrystal-MoS2 hybrids: Photoluminescence quenching

Cited by 29 publications

References 12 publications

Enhancement of Raman Scattering and Exciton/Trion Photoluminescence of Monolayer and Few-Layer MoS₂ by Ag Nanoprisms and Nanoparticles: Shape and Size Effects

Enhancement of Raman Scattering and Exciton/Trion Photoluminescence of Monolayer and Few-Layer MoS₂ by Ag Nanoprisms and Nanoparticles: Shape and Size Effects

Boosting Multiple Interfaces by Co-Doped Graphene Quantum Dots for High Efficiency and Durability Perovskite Solar Cells

Enhanced Absorption in the Wide Wavelength Range: Black Silicon Decorated with Few-Layer PtS₂

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2D gold supercrystal-MoS2 hybrids: Photoluminescence quenching

Cited by 29 publications

References 12 publications

Enhancement of Raman Scattering and Exciton/Trion Photoluminescence of Monolayer and Few-Layer MoS2 by Ag Nanoprisms and Nanoparticles: Shape and Size Effects

Enhancement of Raman Scattering and Exciton/Trion Photoluminescence of Monolayer and Few-Layer MoS2 by Ag Nanoprisms and Nanoparticles: Shape and Size Effects

Boosting Multiple Interfaces by Co-Doped Graphene Quantum Dots for High Efficiency and Durability Perovskite Solar Cells

Enhanced Absorption in the Wide Wavelength Range: Black Silicon Decorated with Few-Layer PtS2

Contact Info

Product

Resources

About

Enhancement of Raman Scattering and Exciton/Trion Photoluminescence of Monolayer and Few-Layer MoS₂ by Ag Nanoprisms and Nanoparticles: Shape and Size Effects

Enhancement of Raman Scattering and Exciton/Trion Photoluminescence of Monolayer and Few-Layer MoS₂ by Ag Nanoprisms and Nanoparticles: Shape and Size Effects

Enhanced Absorption in the Wide Wavelength Range: Black Silicon Decorated with Few-Layer PtS₂