Transparent heat insulation coatings with high selective shielding ability designed with novel superstructures of copper sulfide nanoplates

Han, Lei; Li, Huining; Yao, Fang; Cao, Duanlin

doi:10.1007/s10853-018-2861-8

Cited by 9 publications

(7 citation statements)

References 31 publications

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“…In colloidal synthesis routes, the stoichiometry and chalcogen composition can be tuned by modulating the Cu and chalcogen precursor ratio in solution, or postsynthesis, by reversible redox reactions, ultimately producing tunable LSP resonances in the near and mid-IR. − Among different copper chalcogenide combinations, stoichiometric CuS is a particularly attractive plasmonic material for its exceptionally high carrier density, ease of preparation, low toxicity, and high stability. − In contrast, while Cu 2– x S (and similar chalcogenides such as Cu 2– x Se and Cu 2– x Te) can sustain different amounts of doping and be metastable in several crystallographic structures (for different x ) and are also relatively easy to convert from one to another by performing redox reactions, they can also change over time simply by oxidation in air. With the development of methods to grow CuS nanocrystals (NCs) with a strong plasmonic response in the near-infrared, several applications have been proposed in biomedicine, photovoltaics, chemical sensing, and electronics. − …”

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confidence: 99%

Anisotropic Plasmonic CuS Nanocrystals as a Natural Electronic Material with Hyperbolic Optical Dispersion

et al. 2019

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Copper sulfide nanocrystals have recently been studied due to their metal-like behavior and strong plasmonic response, which make them an attractive material for nanophotonic applications in the near-infrared spectral range, however, the nature of the plasmonic response remained unclear. We have performed a combined experimental and theoretical study of the optical properties of copper sulfide colloidal nanocrystals and show that bulk CuS resembles a heavily doped p-type semiconductor with a very anisotropic energy band structure. As a consequence, CuS nanoparticles possess key properties of relevance to nanophotonics applications: they exhibit anisotropic plasmonic behavior in the infrared and support optical modes with hyperbolic dispersion in the 670-1050 nm spectral range. We also predict that the Ohmic loss is low compared to conventional plasmonic materials such as noble metals. The plasmonic

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confidence: 99%

Anisotropic Plasmonic CuS Nanocrystals as a Natural Electronic Material with Hyperbolic Optical Dispersion

et al. 2019

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“…The bandgap value is found to be around 2.48 eV for both films, which matches well with the literature. [ 20 ] As the bandgap values of CuS and Al–CuS are slightly lower compared to the conventional semiconductors that are used in perovskite bottom transport layers, it can lead to parasitic absorption in the HTL, which will therefore limit the maximum achievable J sc of the device. To circumvent this problem, we use ultrathin CuS and Al–CuS films for the HTL, whose transmittance is estimated to be close to 99% ( Figure a).…”

Section: Resultsmentioning

confidence: 99%

Dual Role of Cu‐Chalcogenide as Hole‐Transporting Layer and Interface Passivator for p–i–n Architecture Perovskite Solar Cell

Sadhu

Rai

Salim

et al. 2021

Adv Funct Materials

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Inorganic hole-transport layers (HTLs) are widely investigated in perovskite solar cells (PSCs) due to their superior stability compared to the organic HTLs. However, in p-i-n architecture when these inorganic HTLs are deposited before the perovskite, it forms a suboptimal interface quality for the crystallization of perovskite, which reduces device stability, causes recombination, and limits the power conversion efficiency of the device. The incorporation of an appropriate functional group such as sulfurterminated surface on the HTL can enhance the interface quality due to its interaction with perovskite during the crystallization process. In this work, a bifunctional Al-doped CuS film is wet-deposited as HTL in p-i-n architecture PSC, which besides acting as an HTL also improves the crystallization of perovskite at the interface. Urbach energy and light intensity versus open-circuit voltage characterization suggest the formation of a better-quality interface in the sulfide HTL-perovskite heterojunction. The degradation behavior of the sulfide-HTL-based perovskite devices is studied, where it can be observed that after 2 weeks of storage in a controlled environment, the devices retain close to 95% of their initial efficiency.

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“…CuS nanoparticles are the newly developed and have the characteristics of low cost, easy modification, excellent photostability, and intrinsic NIR region absorption, which can be used as ideal NIR shielding materials. [ 18 ] Han et al [ 19 ] used CuS as the thermal insulation nanomaterial and acrylic‐amino‐alkyd baking varnish as coating‐forming material to prepare a novel aqueous transparent heat insulation coating, which has excellent transparency in the visible light region and strong absorption in the NIR region when applied to the glass surface. However, one of the limitations of CuS nanoparticles as a NIR shielding agent is their low absorption ability in the region of 1300–2500 nm.…”

Section: Introductionmentioning

confidence: 99%

“…However, one of the limitations of CuS nanoparticles as a NIR shielding agent is their low absorption ability in the region of 1300–2500 nm. [ 18 ] Therefore, it can be seen that the abovementioned types of inorganic nanoparticles only offer the ability to shield the NIR in a specific wavelength range in sunlight, which extensively limits the heat insulation effect.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of PVC/Cs_xWO₃ composite film with excellent near‐infrared light shielding and high visible light transmission

Mao

Yang

et al. 2021

Vinyl Additive Technology

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Near‐infrared (NIR) shielding is essential not only in the building and automobile glass films but also in achieving energy conservation. However, effectively shielding NIR and maintaining high transmittance in the visible light region have been great challenges in the past decade. Recently, hexagonal cesium tungsten bronze (CsxWO3) nanoparticles have been widely studied due to the excellent transparency in the visible light region and strong heat‐shielding ability in the NIR region. Herein, a design concept of transparent polyvinyl chloride (PVC)/CsxWO3 composite film, as a heat insulation material for glasses, was proposed. To achieve this purpose, the PVC/CsxWO3 composite film was prepared by incorporating CsxWO3 slurry with better dispersion than traditional CsxWO3 nanoparticles powder into a transparent PVC matrix. By the UV‐Vis‐NIR spectrophotometer characterization, the PVC/CsxWO3 composite film containing 2.1 phr CsxWO3 slurry displays high blocking of NIR (78%) and high transmittance of visible light (76%). In order to further understand the actual heat insulation effect from the PVC/CsxWO3 composite films, the indoor sunlight simulation test and outdoor cooling experiment with solar illumination variations were carried out, which both showed heat insulation that is superior to the antimony tin oxide and indium tin oxide thin films prepared in our previous work. In addition, the mechanical property of PVC/CsxWO3 composite films shows almost no change with the increase of CsxWO3 slurry. The PVC/CsxWO3 composite films simultaneously achieve excellent shielding of NIR and high transmittance of visible light, which makes it an ideal material to alleviate the current building energy consumption issues.

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Transparent heat insulation coatings with high selective shielding ability designed with novel superstructures of copper sulfide nanoplates

Cited by 9 publications

References 31 publications

Anisotropic Plasmonic CuS Nanocrystals as a Natural Electronic Material with Hyperbolic Optical Dispersion

Anisotropic Plasmonic CuS Nanocrystals as a Natural Electronic Material with Hyperbolic Optical Dispersion

Dual Role of Cu‐Chalcogenide as Hole‐Transporting Layer and Interface Passivator for p–i–n Architecture Perovskite Solar Cell

Preparation and characterization of PVC/Cs_xWO₃ composite film with excellent near‐infrared light shielding and high visible light transmission

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Transparent heat insulation coatings with high selective shielding ability designed with novel superstructures of copper sulfide nanoplates

Cited by 9 publications

References 31 publications

Anisotropic Plasmonic CuS Nanocrystals as a Natural Electronic Material with Hyperbolic Optical Dispersion

Anisotropic Plasmonic CuS Nanocrystals as a Natural Electronic Material with Hyperbolic Optical Dispersion

Dual Role of Cu‐Chalcogenide as Hole‐Transporting Layer and Interface Passivator for p–i–n Architecture Perovskite Solar Cell

Preparation and characterization of PVC/CsxWO3 composite film with excellent near‐infrared light shielding and high visible light transmission

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Preparation and characterization of PVC/Cs_xWO₃ composite film with excellent near‐infrared light shielding and high visible light transmission