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[Euronanolab] – Participation de Codex International 13 May 2024

Codex International a le plaisir d’annoncer le franc succès de sa participation au salon Euronanolabe, qui s’est tenu du 9 au 12 avril à l’université de Twente…

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[Perovskites] – Perfecting perovskites – new gas-quench method yields more stable solar cells 24 January 2024

The new method of making mixed halide-perovskites results in solar cells with improved stability and performance. The new method results in better control over perovskite crystallization rates. This means the crystal structure is more ordered, in part due to researchers understanding and taking advantage of the faster crystallization of bromide relative to iodide.
The result is a material with fewer defects and less halide migration and thus less segregation of the bromide and iodide. This in turn means uniform mixing of bromide and iodide across the material, which allows the material to absorb light evenly. The end result is that solar cells made using the new method will perform better under real-world conditions.
Typical halide perovskite solution deposition uses an anti-solvent drip procedure to initiate crystallization of the halide film. The standard anti-solvent method for producing bromide-iodide mixed halide perovskite films often leads to excessive defect formation (e.g., bromide vacancies) owing to the rapid crystallization of bromide vs. iodide-perovskite phases. Simulations show that halide migration is enhanced in the presence of a large population of halide vacancies. This limits the stability of bromide-iodide mixed halide perovskites under light and heat.
In comparison to the anti-solvent approach, the gentler gas-quench method better controls crystallization, first producing a bromide-rich surface layer that then induces top-down columnar growth to form a gradient structure with less bromide in the bulk than in the surface region. The anti-solvent method does not produce such a gradient structure.
In this study, researchers from the National Renewable Energy Laboratory, the University of Toledo, and the University of Colorado Boulder demonstrated that the gas-quench method also produces fewer bromide vacancies and results in materials with a higher quality opto-electronic performance. Solar cells made using the gas-quench method retain desirable light absorption properties and provide enhanced performance in the form of a higher charge carrier mobility, higher open circuit voltage, and enhanced stability.

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[Nanotechnology] – The ongoing development of DNA nanotechnology 24 January 2024 Read more
[Codex Innovation] – Codex International, leader in Precious Metals Targets 9 January 2024

Our company is Happy to have reniewed its ISO 9001 Certification for its used precious Metal target refining (Au,Ag,Pt,Pd,Rh,Ru,).
In perticular, the Door-to-door service developped by our company offers a seemless, flexible and economically attractive expertise to our customers.

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[Perovskites] – Specially engineered transport layers decouple perovskite thickness from efficiency limitations 2 January 2024

Researchers have long sought to maximize the efficiency of perovskite solar cells while minimizing production costs.

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[Thin-Films] – A bio-inspired vision sensor based on InP quantum dots/oxide thin-film phototransistors 20 November 2023

A research team led by Prof. CAO Hongtao at the Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences, in cooperation with Prof…

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[Thin-Films] – New process boosts efficiency of bifacial CIGS thin film solar cell 20 November 2023

Bifacial thin film solar cells based on copper indium gallium diselenide or CIGS can collect solar energy from both their front and their rear side…

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[Nanomaerials] – Carbon nanotube films open up new prospects for electronics 20 November 2023

Physicists from MIPT and Skoltech have found a way to modify and purposely tune the electronic properties of carbon nanotubes to meet the requirements of novel electronic devices…

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[Innovation] – Codex International is a key partner of Nan ED crystallography project 20 November 2023

The Nan ED Project – Electron Nanocrystallography, is an Innovative Training Network, Marie Skłodowska-Curie Actions, project funded by EU (grant agreement n. 956099) aimed to train a new generation of…

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