Synthesis of atomically thin alloyed molybdenum-tungsten disulfides thin films as hole transport layers in organic light-emitting diodes

Kwon, Ki Chang; Lee, Tae Hyung; Choi, Seokhoon; Choi, Kyoung Soon; Gim, Seung O.; Bae, Sa-Rang; Lee, Jong‐Lam; Jang, Ho Won; Kim, Soo Young

doi:10.1016/j.apsusc.2020.148529

Cited by 13 publications

(6 citation statements)

References 35 publications

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“…This unique characteristic of PCM clusters in OSCs might promote new insights for its utility in high-performance optoelectronic devices. Kwon et al also boosted the efficiency by developing an alloy of molybdenum-tungsten disulfides films as HTL to replace PEDOT:PSS efficiently [ 120 ]. As was mentioned before, Ag NPs can be incorporated into MoO 3 to enhance the electrical and optical properties of the HTL.…”

Section: Hole-transporting Materials As Htls In Oscsmentioning

confidence: 99%

Recent Advances in Hole-Transporting Layers for Organic Solar Cells

et al. 2022

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Global energy demand is increasing; thus, emerging renewable energy sources, such as organic solar cells (OSCs), are fundamental to mitigate the negative effects of fuel consumption. Within OSC’s advancements, the development of efficient and stable interface materials is essential to achieve high performance, long-term stability, low costs, and broader applicability. Inorganic and nanocarbon-based materials show a suitable work function, tunable optical/electronic properties, stability to the presence of moisture, and facile solution processing, while organic conducting polymers and small molecules have some advantages such as fast and low-cost production, solution process, low energy payback time, light weight, and less adverse environmental impact, making them attractive as hole transporting layers (HTLs) for OSCs. This review looked at the recent progress in metal oxides, metal sulfides, nanocarbon materials, conducting polymers, and small organic molecules as HTLs in OSCs over the past five years. The endeavors in research and technology have optimized the preparation and deposition methods of HTLs. Strategies of doping, composite/hybrid formation, and modifications have also tuned the optical/electrical properties of these materials as HTLs to obtain efficient and stable OSCs. We highlighted the impact of structure, composition, and processing conditions of inorganic and organic materials as HTLs in conventional and inverted OSCs.

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Section: Hole-transporting Materials As Htls In Oscsmentioning

confidence: 99%

Recent Advances in Hole-Transporting Layers for Organic Solar Cells

et al. 2022

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“…Transition metal dichalcogenides (TMDs) have drawn considerable attention among two-dimensional (2D) and nanoscale materials for their unique layer-dependent electronic and optical properties. Especially, indirect-to-direct bandgap transition at the monolayer limit and other advantageous properties for hosting tightly bound excitons make them directly applicable to optoelectronic and nanophotonic devices. , Noticeably, applications to light-emitting devices have been extensively studied by many researchers − and recent development even allows opportunities for sizable and flexible devices. , In spite of these advances, TMD materials are confronted by serious limitations on their emitting capabilities because of strong exciton–exciton annihilation (EEA). EEA is a collision-induced decay process that results in annihilation of both excitons, one undergoing nonradiative recombination of an electron and a hole and the other being ionized to a free electron and hole pair.…”

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confidence: 99%

Temperature Dependence of Excitonic Auger Recombination in Excitonic-Complex-Free Monolayer WS₂ by Considering Auger Broadening and Generation Efficiency

Kim

Tran

Taniguchi

et al. 2023

J. Phys. Chem. Lett.

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Monolayer transition metal dichalcogenides (TMDs) have been extensively studied for their optoelectronic properties and applications. However, even at moderate exciton densities, their light-emitting capability is severely limited by Auger-type exciton− exciton annihilation (EEA). Previous work on EEA used oversimplified models in the presence of excitonic complexes, resulting in seriously underestimated values for the Auger coefficient. In this work, we transferred monolayer WS 2 on a gold substrate with hBN encapsulation, where excitons persist as the main species at 3−300 K via metal proximity. We numerically solved the rate equation for excitons to accurately determine the Auger coefficient as a function of temperature by considering laser pulse width and spatially inhomogeneous exciton distribution. We found that the Auger coefficient consists of temperature-dependent and independent terms, consistent with a theoretical model for direct and exchange processes, respectively. We believe that our results provide a guide for enhancing the luminescence quantum yield of TMDs.

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“…Significant area synthesis of Mo 1-x W x S 2 as a hole transport layer (HTL) was realized for organic light-emitting diodes (OLED). Figure 4 D shows the schematic representation of the fabricated OLED device, which was comparable with the already existing PEDOT: PSS units ( Kwon et al., 2021 ). Figure 4 F demonstrates the current density and luminance–voltage curve for the OLED device.…”

Section: Resultsmentioning

confidence: 65%

“… (C) The shifting of VB of MoS 2x Te 2(1−x) as a function of S ( Kim et al., 2020 ) (D) Device structure of OLED. (E) Current density and luminance–voltage curve of the fabricated OLEDs ( Kwon et al., 2021 ). (F) Theoretical result during crack propagation with 40% of W alloy.…”

Section: Resultsmentioning

confidence: 99%

Review of strategies toward the development of alloy two-dimensional (2D) transition metal dichalcogenides

et al. 2021

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Summary Atomically thin two-dimensional (2D) transition metal dichalcogenides (TMDCs) have attracted significant attention owing to their prosperity in material research. The inimitable features of TMDCs triggered the emerging applications in diverse areas. In this review, we focus on the tailored and engineering of the crystal lattice of TMDCs that finally enhance the efficiency of the material properties. We highlight several preparation techniques and recent advancements in compositional engineering of TMDCs structure. We summarize different approaches for TMDCs such as doping and alloying with different materials, alloying with other 2D metals, and scrutinize the technological potential of these methods. Beyond that, we also highlight the recent significant advancement in preparing 2D quasicrystals and alloying the 2D TMDCs with MAX phases. Finally, we highlight the future perspectives for crystal engineering in TMDC materials for structure stability, machine learning concept marge with materials, and their emerging applications.

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Synthesis of atomically thin alloyed molybdenum-tungsten disulfides thin films as hole transport layers in organic light-emitting diodes

Cited by 13 publications

References 35 publications

Recent Advances in Hole-Transporting Layers for Organic Solar Cells

Recent Advances in Hole-Transporting Layers for Organic Solar Cells

Temperature Dependence of Excitonic Auger Recombination in Excitonic-Complex-Free Monolayer WS₂ by Considering Auger Broadening and Generation Efficiency

Review of strategies toward the development of alloy two-dimensional (2D) transition metal dichalcogenides

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Synthesis of atomically thin alloyed molybdenum-tungsten disulfides thin films as hole transport layers in organic light-emitting diodes

Cited by 13 publications

References 35 publications

Recent Advances in Hole-Transporting Layers for Organic Solar Cells

Recent Advances in Hole-Transporting Layers for Organic Solar Cells

Temperature Dependence of Excitonic Auger Recombination in Excitonic-Complex-Free Monolayer WS2 by Considering Auger Broadening and Generation Efficiency

Review of strategies toward the development of alloy two-dimensional (2D) transition metal dichalcogenides

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Temperature Dependence of Excitonic Auger Recombination in Excitonic-Complex-Free Monolayer WS₂ by Considering Auger Broadening and Generation Efficiency