Il s'agit de notre dernière sélection de publications et de brevets mondiaux en anglais sur les nanotechnologies, parmi de nombreuses revues scientifiques en ligne, classées et axées sur les nanotechnologies, les nanoparticules, les nanomatériaux, les nanocomposites, les points quantiques, les nanotubes de carbone, l'ingénierie à l'échelle nanométrique, la nanofabrication et la nanoélectronique.
Design Optimization of Cesium Contents for Mixed Cation MA1−xCsxPbI3-Based Efficient Perovskite Solar Cell
Published on 2025-07-13 by Syed Abdul Moiz, Ahmed N. M. Alahmadi, Mohammed Saleh Alshaikh @MDPI
Abstract: Perovskite solar cells (PSCs) have already been reported as a promising alternative to traditional energy sources due to their excellent power conversion efficiency, affordability, and versatility, which is particularly relevant considering the growing worldwide demand for energy and increasing scarcity of natural resources. However, operational concerns under environmental stresses hinder its economic feasibility. Through the addition of cesium (Cs), this study investigates how to optimize pero[...]
Our summary: Study investigates optimizing perovskite solar cells with mixed-cation compositions of MA1−xCsxPbI3, finding that MA0.5Cs0.5PbI3 achieves maximum efficiency of 18.53% with Cs doping. Optimal device architecture and layer thicknesses are identified for improved performance.
Design Optimization, Cesium Contents, Perovskite Solar Cell, Power Conversion Efficiency
Publication
Monolithically Integrated GaAs Nanoislands on CMOS-Compatible Si Nanotips Using GS-MBE
Published on 2025-07-12 by Adriana Rodrigues, Anagha Kamath, Hannah-Sophie Illner, Navid Kafi, Oliver Skibitzki, Martin Schmidbauer, Fariba Hatami @MDPI
Abstract: The monolithic integration of III-V semiconductors with silicon (Si) is a critical step toward advancing optoelectronic and photonic devices. In this work, we present GaAs nanoheteroepitaxy (NHE) on Si nanotips using gas-source molecular beam epitaxy (GS-MBE). We discuss the selective growth of fully relaxed GaAs nanoislands on complementary metal oxide semiconductor (CMOS)-compatible Si(001) nanotip wafers. Nanotip wafers were fabricated using a state-of-the-art 0.13 μm SiGe Bipolar [...]
Our summary: Monolithic integration of GaAs nanoislands on Si nanotips using GS-MBE enables advancement of optoelectronic devices. Selective growth of fully relaxed GaAs islands on CMOS-compatible Si(001) nanotip wafers. Investigation focuses on growth conditions influence on morphology, crystalline structure, and defect formation.
GaAs, Nanoislands, GS-MBE, CMOS-compatible
Publication
Enhanced Efficiency and Mechanical Stability in Flexible Perovskite Solar Cells via Phenethylammonium Iodide Surface Passivation
Published on 2025-07-11 by Ibtisam S. Almalki, Tamader H. Alenazi, Lina A. Mansouri, Zainab H. Al Mubarak, Zainab T. Al Nahab, Sultan M. Alenzi, Yahya A. Alzahrani, Ghazal S. Yafi, Abdulmajeed Almutairi, Abdurhman Aldukhail, Bader Alharthi, Abdulaziz Aljuwayr, Faisal S. Alghannam, Anas A. Almuqhim, Huda Alkhaldi, Fawziah Alhajri, Nouf K. AL-Saleem, Masfer Alkahtani, Anwar Q. Alanazi, Masaud Almalki @MDPI
Abstract: Flexible perovskite solar cells (FPSCs) hold great promise for lightweight and wearable photovoltaics, but improving their efficiency and durability under mechanical stress remains a key challenge. In this work, we fabricate and characterize flexible planar FPSCs on a polyethylene terephthalate (PET). A phenethylammonium iodide (PEAI) surface passivation layer is introduced on the perovskite to form a two-dimensional capping layer, and its impact on device performance and stability is systematic[...]
Our summary: Enhanced efficiency and mechanical stability achieved in flexible perovskite solar cells through PEAI surface passivation, leading to improved device performance and durability under mechanical stress. Integration of PEAI treatment with optimized ETL and HTL layers enhances efficiency and flexibility, paving the way for reliable and high-performance wearable solar cells.
Efficiency, Mechanical Stability, Perovskite Solar Cells, Phenethylammonium Iodide
Publication
Insights into the Adsorption of Carbon Dioxide in Zeolites ITQ-29 and 5A Based on Kinetic Measurements and Molecular Simulations
Published on 2025-07-11 by Magdy Abdelghany Elsayed, Shixue Zhou, Xiaohui Zhao, Gumawa Windu Manggada, Zhongyuan Chen, Fang Wang, Zhijuan Tang @MDPI
Abstract: Understanding the adsorption mechanism is essential for developing efficient technologies to capture carbon dioxide from industrial flue gases. In this work, laboratory measurements, density functional theory calculations, and molecular dynamics simulations were employed to study CO2 adsorption and diffusion behavior in LTA-type zeolites. The CO2 adsorption isotherms measured in zeolite 5A are best described by the Toth model. Thermodynamic analysis indicates that the adsorption process is spont[...]
Our summary: Study of CO2 adsorption and diffusion in LTA-type zeolites using laboratory measurements, DFT calculations, and molecular dynamics simulations. Thermodynamic analysis shows spontaneous and exothermic adsorption with heterogeneous interactions at Ca2+ and Na+ sites. Comparison between zeolites 5A and ITQ-29 reveals differences in adsorption energy and diffusion kinetics.
Adsorption, Zeolites, Kinetic Measurements, Molecular Simulations
Publication
A Review on Laser-Induced Graphene-Based Electrocatalysts for the Oxygen Reduction Reaction in Electrochemical Energy Storage and Conversion
Published on 2025-07-10 by Giulia Massaglia, Marzia Quaglio @MDPI
Abstract: The increasing demand for efficient and sustainable energy conversion technologies has driven extensive research into alternative electrocatalysts for the oxygen reduction reaction (ORR). Platinum-based catalysts, while highly efficient, suffer from high costs, scarcity, and long-term instability Laser-Induced Graphene (LIG) has recently attracted considerable interest as an effective metal-free electrocatalyst for oxygen reduction reaction (ORR), owing to its remarkable electrical conductivity,[...]
Our summary: A review on the synthesis, properties, and performance of Laser-Induced Graphene-based electrocatalysts for the oxygen reduction reaction. Discussion on heteroatom doping and functionalization techniques. Highlighting challenges and future perspectives for LIG-based ORR catalysts.
Laser-Induced Graphene, Electrocatalysts, Oxygen Reduction Reaction, Energy Storage
Publication
Size Effect of CsPbBr3
Published on 2025-07-09 by Ying Lv, Menghan Duan, Jie An, Yunpeng Wang, Luchao Du @MDPI
Abstract: Lead halide perovskite quantum dots, also known as perovskite nanocrystals, are considered one of the most promising photovoltaic materials for solar cells due to their outstanding optoelectronic properties and simple preparation techniques. The key factors restricting the photoelectric conversion efficiency of solar cell systems are the separation and transmission performances of charge carriers. Here, femtosecond time-resolved ultrafast spectroscopy was used to measure the interfacial charge t[...]
Our summary: Lead halide perovskite quantum dots show promising photovoltaic properties due to their optoelectronic features. The study analyzes the impact of CsPbBr3 size on charge transfer dynamics with TiO2 using ultrafast spectroscopy. Results indicate slower electron transfer and recombination as CsPbBr3 nanocrystals increase in size, suggesting potential for improved solar cell materials.
CsPbBr3, quantum dots, charge transfer, size effect
Publication
Photoconversion curable composition, cured film comprising photoconversion curable composition, and image display device comprising cured film
Patent published on the 2025-06-26 in WO under Ref WO2025135381 by SOLUS ADVANCED MAT CO LTD [KR] (Song Yookyung [kr], Shin Hwangyu [kr], Lee Sunhyung [kr])
Abstract: The present invention relates to a photoconversion curable composition, a cured film comprising the photoconversion curable composition, and an image display device comprising the cured film. The curable composition of the present invention uses cross-linking ligands surface-modified on quantum dots to enable surface uniformity of a coating film and low viscosity to be implemented, and the curable composition is used to improve thermal stability of a thin film.[...]
Our summary: Photoconversion curable composition enables surface uniformity and low viscosity, improving thermal stability of thin film for image display devices.
photoconversion curable composition, cured film, image display device, quantum dots
Patent
Advanced ion exchange membranes and applications thereof
Patent published on the 2025-06-19 in WO under Ref WO2025128460 by WILLIAMS RICHARD KENT [US] (Williams Richard [us], Yi Zheng [us], Graham Chris [us], Lin Keng [tw], Qazi Khushnood [us])
Abstract: Improved performance ion exchange membranes for use in REM, AEM and DMFC fuel cells, buffered fuel cells, hydrolysis, other applications comprise a molecular matrix of homopolymers, di-monomer, heteropolymers, copolymers, or block-polymers of fluorocarbon and hydrocarbon compounds combined with (i) skeletal support grid to improve durability, handling, reduce membrane swelling, and sequester dopants and nanoparticles from leakage; (ii) microporous membrane formed using a sacrificial filler proce[...]
Our summary: Advanced ion exchange membranes with improved performance for various applications, incorporating molecular matrix, skeletal support grid, microporous membrane, hetero-ionomeric matrix, permanent fillers, ionic liquid doping, membrane nanocoating, and catalytic nanocoating. Integrated into iBFC power blade and energy bank applications.
ion exchange membranes, fuel cells, nanocoating, conductivity
Patent
