Conductive Copper Sulfide Thin Films on Polyimide Foils for Optical and Optoelectronic Applications

Cardoso, J.; Gomez‐Daza, O.; Ixtlilco, Luis; Nair, M. T. S.; Nair, P. K.

doi:10.1142/s0217984901002518

Cited by 8 publications

(7 citation statements)

References 3 publications

(3 reference statements)

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“…Therefore, there is still a challenge to search new anode materials for both LIBs and SIBs. Copper sulfides (Cu x S) have attracted extensive attention in many fields such as optoelectronic device, sensors, solar cells, LIBs and NIBs due to its abundant resources, high theoretical capacity as well as low cost . Among various compositions of Cu x S family, Cu 2 S is considered as a promising electrode material for LIBs due to its flat discharge curves, low fabrication costs and abundant resources in nature, and now it is also studied as electrode materials for SIBs …”

Section: Introductionmentioning

confidence: 99%

Cu₂S@ N, S Dual‐Doped Carbon Matrix Hybrid as Superior Anode Materials for Lithium/Sodium ion Batteries

Chen

Ren

et al. 2018

ChemElectroChem

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Cu2S is considered as a promising electrode material for lithium‐ion and sodium‐ion batteries owing to its flat charge‐discharge plateau as well as the abundant reserves. However, serious capacity fading and formation of polysulfides during electrochemical process restrict its practical application. In this work, a new type of Cu2S@N, S dual‐doped carbon matrix (Cu2S@NSCm) hybrid is synthesized through a simple in‐situ polymerization process and subsequent carbonization process. Due to the N, S dual‐doped carbon matrix, which can buffer the volume change, restrain the dissolution of polysulfide and enhance the electron conductivity during electrochemical process, the hybrid demonstrates excellent electrochemical performance. The Cu2S@NSCm hybrid exhibits a reversible capacity of 560.1 mAh g−1 at a current density of 1000 mA g−1 after 550 cycles when used in lithium‐ion batteries, which is among the best performance for Cu2S based anode materials. Moreover, a capacity of 182.3 mAh g−1 is obtained after 50 cycles when used as an anode material in sodium ion batteries, which is much better than the pure Cu2S.

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Section: Introductionmentioning

confidence: 99%

Cu₂S@ N, S Dual‐Doped Carbon Matrix Hybrid as Superior Anode Materials for Lithium/Sodium ion Batteries

Chen

Ren

et al. 2018

ChemElectroChem

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“…With the ever-increasing trend toward device compactness and miniaturization, advances have been made recently in preparing nanoscale Cu 2 S structures − that may find applications in venerable technologies, such as solar cells ,, (especially in the extremely thin absorber (ETA) solar cells), the photothermal ablation of tumor cells, nanometer-scale switches with memory effect, memory cells, ammonia gas sensors, and various potential applications in large areas such as architectural glazing, photothermal devices, and photovoltaic devices . The large surface-to-volume ratio in such miniaturized low-dimensional material structures makes it imperative that a number of questions be addressed and elucidated regarding surface effects on the structure and the physical nature and operational modes of devices employing these materials systems.…”

Section: Introductionmentioning

confidence: 99%

Structure Relaxation and Liquidlike Enhanced Cu Diffusion at the Surface of β-Cu₂S Chalcocite

et al. 2021

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The hitherto unexplored surface structural and dynamical properties of the thermoelectric material β-Cu2S chalcocite, are uncovered using ab initio molecular dynamics simulations at 450 K. The material exhibits a hybrid crystalline-liquid behavior, with the liquidlike dynamics of the Cu atoms and the crystalline order of the sulfur sublattice. The topmost nanoscale region of the material is predicted to undergo significant structural relaxation, resulting in a ∼10% increase in the distance between the topmost S-layers accompanied by an increased Cu density. Cu diffusion in the interlayer regions of the surface S-sublattice is enhanced (doubled) compared to the bulk value, and an underlying microscopic mechanism, entailing marked emergent surface-induced softening of the S-sublattice vibrational dynamics, is described.

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“…However, the fabrication of the CuS/PVP nanowires is limited by the feeding rate of the electrospinning process. Interestingly, when fabricated as a thin film, CuS compromises its LSPR for excellent reflectance in near-IR wavelengths, , thus attenuating transmission via reflection instead of absorption. Radio frequency magnetron sputtering (RFMS) can synthesize large-area conformal thin films or nanostructured CuS (fins/pillars) at high throughput. , Moreover, due to its physical processes and low process temperature, RFMS can coat almost any substrate including flexible substrates such as polymer foams and polyethylene terephthalate (PET) films.…”

Section: Introductionmentioning

confidence: 99%

Energy-Efficient Stacks—Covellite (CuS) on Polyethylene Terephthalate Film: A Sustainable Solution to Heat Management

Rath

Chua

et al. 2020

J. Phys. Chem. C

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Regulating the temperature of buildings has the highest expenditure of energy (35−40%); thus, transparent heat reflectors (THRs) have been at the forefront of passive cooling technology due to its ability to reflect near-infrared (NIR) wavelengths without compromising optical transmission. Current designs like metallic thin films and dielectric− metal−dielectric are expensive and face complications with material incompatibility, oxidation, and interdiffusion, which hamper their performance. A cost-effective THR using a single-layer coating has not yet been achieved due to the susceptibility of metals to oxidation. In this work, a layer of CuS was fabricated onto flexible polyethylene terephthalate (PET) via radio frequency magnetron sputtering (RFMS), a high throughput method known for its conformal large-area fabrication. The 150 nm-thick CuS-PET films demonstrated a visible transmission T 550 nm of 64.1% and NIR reflectance of 50% that resulted in 8 °C passive cooling. Additionally, wetting the surface resulted in a total of 11 °C of passive cooling due to its hydrophilicity, giving each household an estimated 20% of cost saving per year. Moreover, CuS-PET films are stable in ambient conditions due to instantaneous surface passivation, preventing it from being oxidized and retaining its performance even after three months. Through the optimization of the RFMS fabrication of CuS-PET films, the realization of a cost-effective, single-layer, flexible, and industrially scalable THR is possible.

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Conductive Copper Sulfide Thin Films on Polyimide Foils for Optical and Optoelectronic Applications

Cited by 8 publications

References 3 publications

Cu₂S@ N, S Dual‐Doped Carbon Matrix Hybrid as Superior Anode Materials for Lithium/Sodium ion Batteries

Cu₂S@ N, S Dual‐Doped Carbon Matrix Hybrid as Superior Anode Materials for Lithium/Sodium ion Batteries

Structure Relaxation and Liquidlike Enhanced Cu Diffusion at the Surface of β-Cu₂S Chalcocite

Energy-Efficient Stacks—Covellite (CuS) on Polyethylene Terephthalate Film: A Sustainable Solution to Heat Management

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Conductive Copper Sulfide Thin Films on Polyimide Foils for Optical and Optoelectronic Applications

Cited by 8 publications

References 3 publications

Cu2S@ N, S Dual‐Doped Carbon Matrix Hybrid as Superior Anode Materials for Lithium/Sodium ion Batteries

Cu2S@ N, S Dual‐Doped Carbon Matrix Hybrid as Superior Anode Materials for Lithium/Sodium ion Batteries

Structure Relaxation and Liquidlike Enhanced Cu Diffusion at the Surface of β-Cu2S Chalcocite

Energy-Efficient Stacks—Covellite (CuS) on Polyethylene Terephthalate Film: A Sustainable Solution to Heat Management

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Product

Resources

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Cu₂S@ N, S Dual‐Doped Carbon Matrix Hybrid as Superior Anode Materials for Lithium/Sodium ion Batteries

Cu₂S@ N, S Dual‐Doped Carbon Matrix Hybrid as Superior Anode Materials for Lithium/Sodium ion Batteries

Structure Relaxation and Liquidlike Enhanced Cu Diffusion at the Surface of β-Cu₂S Chalcocite