Publications

• Article dans une revue

Co-Effect of pH Control Agent and pH Value on the Physical Properties of ZnO Thin Films Obtained by Chemical Bath Deposition for Potential Application in Dye-Sensitized Solar Cells

Alphonse Déssoudji Gboglo, Mazabalo Baneto, Komlan Segbéya Gadedjisso-Tossou, Ognanmi Ako, Ayayi Claude Ahyi, Muthiah Haris, Muthusamy Senthilkumar, Kekeli N’konou, Bruno Grandidier, Katawoura Beltako, Komi Apélété Amou, Milohum Mikesokpo Dzagli

This study presents the influence of pH control agents and pH value on the physical properties of ZnO thin films obtained by chemical bath deposition. ZnO thin films were synthesized on glass substrates using precursor solutions of different pHs prepared from two bases: sodium hydroxide (NaOH) and…

Surfaces, 2025, 8 (3), pp.46. ⟨10.3390/surfaces8030046⟩. ⟨hal-05313801⟩

• Article dans une revue

Thermal Enhancement of GaN Schottky Diodes Annealed at 600°C for High Power and High Temperature RF Applications

Beatriz Orfao, Amir Al Abdallah, Hugo Bouillaud, Guillaume Ducournau, Yannick Roelens, Malek Zegaoui, Mohammed Zaknoune

In this paper, we report the investigation of the thermal enhancement and the behavior of GaN Schottky diodes grown by metal organic chemical vapor deposition (MOCVD) on sapphire substrates for RF power applications and their potential to operate under extreme temperature. The Schottky barrier…

Electronics Letters, 2025, 61 (1), pp.e70307. ⟨10.1049/ell2.70307⟩. ⟨hal-05149241⟩

• Article dans une revue

ScAlN/GaN-on-Si (111) HEMTs for RF applications

Seif El Whibi, Nagesh Bhat, Yassine Fouzi, Nicolas Defrance, Jean-Claude de Jaeger, Zahia Bougrioua, Florian Bartoli, Maxime Hugues, Yvon Cordier, Marie Lesecq

ScAlN is a promising barrier material for next generation RF high electron mobility transistors, outperforming AlGaN thanks a higher 2-dimensional electron gas (2DEG) density and a thinner barrier with a lower lattice mismatch with GaN. A sub-10 nm barrier ScAlN/GaN heterostructure, grown by…

Applied Physics Express, 2025, 18 (4), pp.046501. ⟨10.35848/1882-0786/adc5db⟩. ⟨hal-05008937⟩

• Article dans une revue

Topological Berry Antenna on a Silicon Chip for Terahertz Wireless Communication

Sonu Kumar, Ridong Jia, Yi Ji Tan, Thomas Caiwei Tan, Pascal Szriftgiser, G Arun Kumar, Guillaume Ducournau, Arokiaswami Alphones, Ranjan Singh

Nonzero Berry curvature is central to the existence of topological edge states in electronic and photonic valley-Hall systems. While manipulating the Berry curvature in condensed matter systems is challenging, valley-Hall topological photonics offer unprecedented control, where the broken spatial…

Advanced Photonics Research, In press, ⟨10.1002/adpr.202500123⟩. ⟨hal-05131748⟩

• Article dans une revue

Strategies to achieve efficiencies of over 19% for organic solar cells

Xingchi Xiao, Malika Chalh, Zhi Rong Loh, Esther Mbina, Tao Xu, Roger C. Hiorns, Yujia Li, Maloy Das, Kekeli N'Konou, Leonard W T Ng

Organic solar cells are a promising system for generating clean energy. Recent advancements, particularly in non-fullerene acceptors such as Y6 and its derivatives, along with the development of innovative polymer donors, have significantly enhanced the power conversion efficiency of organic solar…

Cell Reports Physical Science, 2025, 6 (1), pp.102390. ⟨10.1016/j.xcrp.2024.102390⟩. ⟨hal-04932307⟩

• Article dans une revue

Using Synapse Saturation in Spiking Neural Networks for Wake Up Receivers in Internet of Things Networks

Guillaume Marthe, Claire Goursaud, Laurent Clavier

Energy consumption remains a predominant constraint in numerous Internet of Things (IoT) applications, as microcontrollers typically exhibit excessively high power consumption. To address this issue, novel circuit designs have been introduced, and the utilization of spiking neurons and analog…

IEEE Internet of Things Journal, 2025, pp.1-1. ⟨10.1109/JIOT.2025.3599668⟩. ⟨hal-05229337⟩

• Ouvrages

An Intellectual History of Science in the Renaissance. Cultural and Fundamental Frameworks. Vol. 1

Raffaele Pisano

Springer, In press. ⟨hal-04859393⟩

• Article dans une revue

Drying Behavior of Flax Stems at Different Degrees of Dew Retting Under Simulated Rainfall: Implications for Smart Agriculture and Sensor Development

Ali Reda, Lionel Buchaillot, Steve Arscott

Dew retting of flax stems is a key agricultural process which facilitates fiber extraction from parent stems. If sensors are to be developed to monitor the degree of retting for optimal fiber extraction, then stem characteristics such as water uptake and loss need to be accurately known. Here, the…

Agriculture, 2025, 15 (4), pp.395. ⟨10.3390/agriculture15040395⟩. ⟨hal-04960263⟩

• Communication dans un congrès

Ondes élastiques topologiquement guidées pour l'haptique de surface

Massaï Hatoumva, Charles Croënne, Bertrand Dubus, Arthur Paté, M. Miniaci, Florian Allein, Frédéric Giraud

<div><p>Les cristaux phononiques topologiques marquent une avancée majeure pour le guidage et le contrôle des ondes élastiques en permettant la synthèse des modes localisés spécifiques (états de bords). Si les propriétés de ces modes font actuellement l'objet de nombreuses études,…

17e Congrès Français d'Acoustique, Société Française d'Acoustique, Apr 2025, Paris, France. ⟨hal-05362771⟩

• Communication dans un congrès

Effect of High Temperature RF Stress on the Trapping Behavior of Carbon Doped AlN/GaN/AlGaN HEMTs

Lyes Ben-Hammou, François Grandpierron, Elodie Carneiro, Katir Harrouche, Etienne Okada, Gilles Patriarche, Farid Medjdoub

This study investigates the impact of short-term hightemperature operating life (HTOL) reliability testing on the trapping behavior and power performance of carbon-doped AlN/GaN/AlGaN High Electron Mobility Transistors (HEMTs). HTOL stress can lead to significant degradation in key performance…

2025 IEEE International Reliability Physics Symposium (IRPS 2025), Mar 2025, Monterey, CA, United States. ⟨10.1109/irps48204.2025.10983377⟩. ⟨hal-05344709⟩