Related references
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Article
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Summary: In this work, combinations of amine and chalcogenide ligands were used to fabricate highly crystalline and oriented formamidinium lead iodide thin films with reduced defect densities and increased charge carrier lifetimes. The dual additives can tune the perovskite intermediate state and control the crystallization, leading to devices with improved efficiencies and stabilities. The results also indicate that the amine selection can be used to tune the surface properties.
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Summary: IR spectroscopy is widely used due to its fast analysis and sensitivity, making it suitable for studying the degradation of perovskite thin films. This study investigated the degradation of CH3NH3PbI3-xClx thin films caused by atmosphere and light using scanning electron microscopy, IR spectroscopy, and optical absorption. The results showed that the degradation of the perovskite functional layer varied depending on the surrounding atmosphere, with chemical bonds maintained under nitrogen but degradation observed under ambient conditions due to hydration. This work highlights the adverse effects of water dissociation on the efficiency and stability of perovskite solar cells and provides insights for developing stable and sustainable alternatives.
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Yuhao Peng et al.
Summary: In this study, all-inorganic cesium lead bromide polycrystalline films with grain size exceeding 1 μm were successfully created through a two-step sintering process. Compared to the one-step sintering process, the two-step process resulted in films with larger grain size, higher density, and lower trap density. Photovoltaic devices based on the two-step sintering process demonstrated enhanced efficiency and reduced hysteresis.
Review
Optics
Amir Arbabi et al.
Summary: Optical metalenses, which are arrays of submicrometre scatterers that collectively focus light, have gained increasing research interest due to their ability to realize conventional optical elements with novel functionalities. Their progress is driven by the demand for low-cost, high-performance miniaturized optical systems and is supported by advancements in nanofabrication and computational tools. This review discusses the capabilities of metalenses, such as their multifunctionality and efficient subwavelength focusing, and explores their potential applications and current state of the art. The outstanding challenges in the field are also highlighted, along with the application areas where metalenses could have a substantial impact.
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Wei Xu et al.
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Xiangang Luo
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Ali Ali et al.
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Nanoscience & Nanotechnology
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Neha Niharika et al.
Summary: A bi-controllable all dielectric metasurface structure has been designed that allows for tuning of the maximum absorptance frequency through an external magnetic field and geometrical rotation. The simulation results demonstrate that the metasurface achieves high absorptance rates and is polarization insensitive when a magnetic field is applied. Furthermore, the metasurface shows sensitivity to changes in the refractive index value of the surrounding medium, making it suitable for chemical and biosensing applications.
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Lijuan Zhang et al.
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Hailong Yin et al.
Summary: The nanofabrication mechanism of coupling field tip enhancement induced by laser-irradiated probe tip was investigated theoretically and experimentally. The result demonstrated that the electro-thermal coupling effect and thermal-mechanical coupling effect are the basic principles of this technique, independent of the materials. The significance of this study lies in enabling a refined understanding of the fundamental physics of surface nanostructuring and advancing the scientific and industrial applications of the technology.
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Summary: This study presents simulations on metasurface-based NO2 gas sensors operating in the telecom C band and exhibiting strong variations in reflection coefficient after assimilation of NO2 molecules. A polymer-based unit architecture, with hydrophyllic and NO2-responsive layers, allows for highly-sensitive response in the desired spectral window, overcoming limitations of absorption-based and electrical signal-based sensors. This proposed sensor architecture shows great potential for both biological and atmospheric NO2 gas-sensing applications.
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Weihua Ren et al.
Summary: In this study, Poly(3-hexylthiophene) (P3HT) was used as hole transport layer (HTL) in inorganic cesium lead triiodide (CsPbI3) perovskite solar cells (PSCs). By incorporating a nematic liquid crystal molecule, 4-Cyano-4-Pentylbipheny (5CB), the hole mobility of P3HT was significantly increased and the energy level arrangement at CsPbI3/P3HT interface was optimized. This resulted in a substantial increase in Voc and FF, leading to a record high efficiency of 18.75% for the P3HT-based CsPbI3 PSCs. Moreover, the P3HT:5CB HTL also exhibited superior moisture stability.
CHEMICAL ENGINEERING JOURNAL
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Guoxin Li et al.
Summary: In this study, CsI was used as a dopant to modify Spiro-OMeTAD, reducing voids in the hole transport layer and improving the functional characteristics of the material. The formation of a complex with TBP prevented rapid evaporation and eliminated cracks in Spiro-OMeTAD. The uniformly dispersed TBP inhibited the agglomeration of Li-TFSI in Spiro-OMeTAD, increasing conductivity and adjusting the energy level. The CsI-modified perovskite solar cells achieved a high efficiency and exhibited excellent long-term stability.
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Lu Yang et al.
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ADVANCED MATERIALS
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Ran Wang et al.
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Weiwen Jiang et al.
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Michael Spence et al.
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ACS APPLIED ENERGY MATERIALS
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Furqanul Hassan Naqvi et al.
Summary: Raman spectroscopy was used to study the structural phase transitions and thermal degradation of MAPbCl(3) single crystals over a wide temperature range, revealing discontinuous anomalies in the low-frequency lattice modes and changes in the number of Raman modes at transition points.
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Ji Seong Choi et al.
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Ana Barar et al.
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Chemistry, Multidisciplinary
William Chiappim et al.
Summary: The increasing demand for miniaturized devices has led to high importance and requirements for nanofabrication technologies that are of high-quality, low temperatures, and low cost. In recent years, the development of atomic layer deposition (ALD) processes has sparked interest in their use in advanced electronic and nano/microelectromechanical systems (NEMS/MEMS) device manufacturing. Non-thermal plasma (NTP) technology has emerged as a significant technique that expands the process window of ALD and allows the fabrication of various nanomaterials at lower temperatures, enabling the coverage of thermosensitive substrates with good formability and uniformity. This review article comprehensively describes the impact of NTP on the ALD universe and its applications in device fabrication. It also presents the integration of NTP and ALD technologies to form the plasma-assisted ALD (PA-ALD) technique, which has been successfully used in nanofabrication and surface modification. The advantages and limitations of this technique are discussed, along with the introduction of atomic layer etching (ALE) technique, another development of the NTP and ALD junction that has gained attention for plasma-assisted nanofabrication.
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Chemistry, Multidisciplinary
Yao Liang et al.
Summary: This article introduces a novel plasmonic metasurface structure in the mid-infrared range that achieves full-Stokes polarization perfect absorption, providing strong field enhancement and sharp differentiation of spectral responses for various polarization states.
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Joel Y. Y. Loh et al.
Summary: Metamaterials are synthetic structures that achieve efficient light absorption by manipulating refractive index, and enhance catalytic reaction rates through intricate optical and plasmonic resonance processes. Compared to nanoparticles or films, metamaterial catalysts exhibit superior photocatalytic performance.
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Yu Qiu et al.
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Chenzhe Wang et al.
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Octavian Danila et al.
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Chenxia Kan et al.
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ACS ENERGY LETTERS
(2021)
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Shobhit K. Patel et al.
Summary: A novel graphene-based metasurface plasmonic biosensor is proposed, utilizing gold split-ring resonators to enhance electromagnetic field incidents. Two types of split-ring resonator based metasurface designs are analyzed for biosensing, showing the highest sensitivity in single split ring resonator design for hemoglobin-urine concentrations. This biosensor has the potential to be a key component in future medical biosensing devices.
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(2021)
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Yongzhi Cheng et al.
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Octavian Danila et al.
Summary: Simulations were conducted on the spectral behavior of non-layered gold-silicon and all-silicon frequency-selective metasurfaces in the mid-infrared spectral window, demonstrating their viability for applications in absorbers, sensors, and imaging systems.
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Review
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