Upconverter Nanoparticles as Plasmon-induced Broadband Light Converters
Vallee Renaud Arthur Leon
Issue:
Volume 7, Issue 2, June 2021
Pages:
35-41
Received:
9 April 2021
Accepted:
22 April 2021
Published:
8 May 2021
Abstract: We show numerically how lanthanide-doped upconverter nanocrystals inserted at optimal positions in adjustable and smooth 2D plasmonic arrays may change and potentially control the whole UV-visible-NIR reflectance spectra displayed by these structures. The analysis and interplay between a custom-built simple 5-levels 2-electrons quantum model and the bare structure have been studied in depth and revealed very fundamental and interesting physics. Essentially, the largely and selectively enhanced white-light excitation field and optimized local density of states at the location of the emitters favor some energy transfer paths and a redistribution of light energy in a broad spectral range. Interestingly, the extent to which the spectra can be modulated owing to the emission properties of such very robust multilevel emitters may find interesting applications and notably allow increased efficiency of emission in Light Emitting Devices or solar light redistribution and collection in Solar cells, where conversions from one color to any other one play a major role.
Abstract: We show numerically how lanthanide-doped upconverter nanocrystals inserted at optimal positions in adjustable and smooth 2D plasmonic arrays may change and potentially control the whole UV-visible-NIR reflectance spectra displayed by these structures. The analysis and interplay between a custom-built simple 5-levels 2-electrons quantum model and th...
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Ultra High Vacuum Chemical Vapor Deposition Techniques for Economic Growth of Silicon Nanowires
Rashad Filfilan,
Maha Khayyat
Issue:
Volume 7, Issue 2, June 2021
Pages:
42-48
Received:
23 July 2021
Accepted:
6 August 2021
Published:
11 August 2021
Abstract: Ultra High Vacuum Chemical Vapor Deposition (UHVCVD) reactor has been used to grow silicon nanowires via innovative economical approaches using chemical active materials as catalysts such as aluminum. Scanning Electron Microscopy has been used to study the success of the growth for further investigations and advanced applications such as solar cells. Solar manufacturers are looking for approaches to improve yield and cell efficiency and lower manufacturing costs overall. One of the main goals of this project is to tear down the various parameters involved in the current photovoltaic panels and improve it in one or more directions (properties, performance, costs). The current study is addressing the solar market with special concern of the efficiency goal. The mechanical flexibility of plastic materials is of high demands for all photovoltaic applications onto curved surfaces for architectural integration. Polycarbonate AND/OR poly methyl methacrylate encapsulation of photovoltaic modules and usage to fabricate advanced silicon nanowires solar cells can be emerging technologies delivering excellent performance and durability at a competitive cost. Although solar panels with glass protective facing still account for the majority of the installations of photovoltaic modules, however, it is expected that the adaptation of these new technologies will rapidly gain market share. The growth of silicon nanowires using chemical vapor deposition to fabricate advanced solar cells can be done via two innovative approaches. Alternative techniques for lithographic formation of the mask can provide advantages for low-cost processing, especially where a simple repeating pattern is required.
Abstract: Ultra High Vacuum Chemical Vapor Deposition (UHVCVD) reactor has been used to grow silicon nanowires via innovative economical approaches using chemical active materials as catalysts such as aluminum. Scanning Electron Microscopy has been used to study the success of the growth for further investigations and advanced applications such as solar cell...
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