scholarly journals High-Performance Luminescent Solar Concentrators Based on Poly(Cyclohexylmethacrylate) (PCHMA) Films

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2898
Author(s):  
Francisco José Ostos ◽  
Giuseppe Iasilli ◽  
Marco Carlotti ◽  
Andrea Pucci
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Quantum Efficiency ◽  
High Performance ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators ◽  
The Matrix ◽  
Polymer Interactions

In this study, we report on the use of poly(cyclohexylmethacrylate) (PCHMA) as an alternative to the commonly used poly(methylmethacrylate) (PMMA) for the design of efficient luminescent solar concentrators (LSCs). PCHMA was selected due to its less polar nature with respect to PMMA, a characteristic that was reported to be beneficial in promoting the fluorophore dispersibility in the matrix, thus maximizing the efficiency of LSCs also at high doping. In this sense, LSC thin films based on PCHMA and containing different contents of Lumogen F Red 305 (LR, 0.2–1.8 wt%) demonstrated optical efficiencies (ηopt) comprising between 9.5% and 10.0%, i.e., about 0.5–1% higher than those collected from the LR/PMMA systems. The higher LR/polymer interactions occurred using the PCHMA matrix maximized the solar harvesting characteristics of the fluorophore and limited the influence of the adverse dissipative phenomena on the fluorophore quantum efficiency. These effects were also reflected by varying the LSC film thickness and reaching maximum ηopt of about 11.5% in the case of PCHMA films of about 30 µm.

High Performance Metal Surface Coating Using Ta2O5 Thin Film Prepared by D.C. Magnetron Sputtering

2014 ◽  
Vol 979 ◽  
pp. 240-243
Author(s):  
Narathon Khemasiri ◽  
Chanunthorn Chananonnawathorn ◽  
Mati Horprathum ◽  
Pitak Eiamchai ◽  
Pongpan Chindaudom ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Magnetron Sputtering ◽  
Film Thickness ◽  
Metal Surface ◽  
High Performance ◽  
Grazing Incidence ◽  
Surface Finishing ◽  
Afm Micrographs ◽  
Protective Performance

Tantalum oxide (Ta2O5) thin films were deposited as the protective layers for the metal surface finishing by the DC reactive magnetron sputtering system. The effect of the Ta2O5 film thickness, ranging from 25 nm to 200 nm, on the physical properties and the anti-corrosive performance were investigated. The grazing-incidence X-ray diffraction (GIXRD) and the atomic force microscopy (AFM) were used to examine the crystal structures and the surface topologies of the prepared films, respectively. The XRD results showed that the Ta2O5 thin films were all amorphous. The AFM micrographs demonstrated the film morphology with quite smooth surface features. The surface roughness tended to be rough when the film thickness was increased. To examine the protective performance of the films, the poteniostat and galvanometer was utilized to examine the electrochemical activities with the 1M NaCl as the corrosive electrolyte. The results from the I-V polarization curves (Tafel slope) indicated that, with the Ta2O5 thin film, the current density was significantly reduced by 3 orders of magnitude when compared with the blank sample. Such results were observed because of fully encapsulated surface of the samples were covered with the sputtered Ta2O5 thin films. The study also showed that the Ta2O5 thin film deposited at 50 nm yielded the most extreme protective performance. The Ta2O5 thin films therefore could be optimized for the smallest film thickness for highly potential role in the protective performance of the metal surface finishing products.

Fabrication of high-performance luminescent solar concentrators using N-doped carbon dots/PMMA mixed matrix slab

2018 ◽  
Vol 63 ◽  
pp. 237-243 ◽  
Author(s):  
Xiao Gong ◽  
Wenwen Ma ◽  
Yunxia Li ◽  
Lingqi Zhong ◽  
Wenjing Li ◽  
...  
Keyword(s):  
Carbon Dots ◽  
High Performance ◽  
Mixed Matrix ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators ◽  
Doped Carbon Dots

scholarly journals Formic Acid Oxidation on Pd Thin Film Coated Au Nanocrystals

Surfaces ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 372-386 ◽  
Author(s):  
Yongan Tang ◽  
Shouzhong Zou
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Formic Acid ◽  
Single Crystals ◽  
High Performance ◽  
Formic Acid Oxidation ◽  
Oxidation Potential ◽  
Acid Oxidation ◽  
Band Theory ◽  
Gold Nanocrystals

Cubic, octahedral, and rhombic dodecahedral gold nanocrystals enclosed by {100}, {111}, and {110} facets, respectively, were prepared by a seed-mediated growth method at the room temperature. Palladium thin films were coated on these Au nanocrystals by a redox replacement approach to explore their catalytic activities. It is revealed that formic acid and carbon monoxide oxidation in 0.1 M HClO4 on Au nanocrystals coated with one monolayer (ML) of Pd are facet-dependent and resemble those obtained from corresponding Pd single crystals and Pd films deposited on bulk Au single crystals, suggesting epitaxial growth of Pd overlayers on the Au nanocrystal surfaces. As the Pd film thickness increased, formic acid oxidation current density decreased and the CO oxidation potential moved to more negative. The catalytic activity remained largely unchanged after 3–5 MLs of Pd deposition. The specific adsorption of (bi)sulfate was shown to hinder the formic acid oxidation and the effect decreased with the increasing Pd film thickness. These observations were explained in the framework of the d-band theory. This study highlights the feasibility of engineering high-performance catalysts through deposition of catalytically active metal thin films on facet-controlled inert nanocrystals.

Hybrid Perovskite Thin Films as Highly Efficient Luminescent Solar Concentrators

2016 ◽  
Vol 4 (12) ◽  
pp. 2126-2132 ◽  
Author(s):  
Katerina Nikolaidou ◽  
Som Sarang ◽  
Christine Hoffman ◽  
Benaz Mendewala ◽  
Hidetaka Ishihara ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Concentrators ◽  
Highly Efficient ◽  
Luminescent Solar Concentrators ◽  
Hybrid Perovskite

scholarly journals High-Performance, Large-Area, and Ecofriendly Luminescent Solar Concentrators Using Copper-Doped InP Quantum Dots

iScience ◽  
2020 ◽  
Vol 23 (7) ◽  
pp. 101272 ◽  
Author(s):  
Sadra Sadeghi ◽  
Houman Bahmani Jalali ◽  
Shashi Bhushan Srivastava ◽  
Rustamzhon Melikov ◽  
Isinsu Baylam ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Large Area ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators ◽  
Inp Quantum Dots

scholarly journals High-performance laminated luminescent solar concentrators based on colloidal carbon quantum dots

2019 ◽  
Vol 1 (12) ◽  
pp. 4888-4894 ◽  
Author(s):  
Haiguang Zhao ◽  
Guiju Liu ◽  
Guangting Han
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
High Performance ◽  
Single Layer ◽  
Carbon Quantum Dots ◽  
Solar Concentrator ◽  
Solar Concentrators ◽  
Carbon Quantum Dot ◽  
Luminescent Solar Concentrators ◽  
Luminescent Solar Concentrator

A carbon-quantum-dot based laminated luminescent solar concentrator exhibits an ηopt of 1.6%, 1.6 times higher than that of a single-layer LSC.

scholarly journals A push–pull silafluorene fluorophore for highly efficient luminescent solar concentrators

RSC Advances ◽  
2017 ◽  
Vol 7 (59) ◽  
pp. 37302-37309 ◽  
Author(s):  
Federico Gianfaldoni ◽  
Francesca De Nisi ◽  
Giuseppe Iasilli ◽  
Annamaria Panniello ◽  
Elisabetta Fanizza ◽  
...  
Keyword(s):  
Thin Films ◽  
Methyl Methacrylate ◽  
Amino Group ◽  
Solar Concentrators ◽  
Poly Methyl Methacrylate ◽  
Highly Efficient ◽  
Luminescent Solar Concentrators

We report on the preparation of luminescent collectors based on poly(methyl methacrylate) (PMMA) thin films doped with a red-emitting 2-amino-7-acceptor-9-silafluorene, where the amino group is –N(CH3)2and the acceptor is –CHC(CN)2.

Eu-doped ZnO quantum dots with solid-state fluorescence and dual emission for high-performance luminescent solar concentrators

2021 ◽  
Author(s):  
Xiao Gong ◽  
Hang Jiang ◽  
Mengyan Cao ◽  
Zhihui Rao ◽  
Xiujian Zhao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Industrial Applications ◽  
Optical Quality ◽  
Dual Emission ◽  
Solar Concentrators ◽  
Environmental Friendliness ◽  
High Optical Quality ◽  
Luminescent Solar Concentrators ◽  
Doped Zno

Heavy-metal-free quantum dots (QDs) are promising luminophores for luminescent solar concentrators (LSCs) because of environmental friendliness, which is essential for industrial applications. In order to keep high optical quality and...

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