Voici la traduction anglaise complète, avec un vocabulaire scientifique adapté à un résumé de thèse.

Écriture

This PhD thesis builds on previous research aimed at improving the passivation of HgCdTe photodiodes, particularly those based on P-i-N architectures. It seeks to understand the physicochemical mechanisms responsible for the degradation of interfaces between the semiconductor material and the passivation layer. Previous studies have highlighted the influence of residual contaminants, surface oxidation, and excess tellurium on the electrical properties of devices.

The main objective is to develop surface engineering processes that enable better control of the chemical composition and defects at these interfaces. Various chemical and electrochemical treatments will be investigated to limit oxidation, reduce contamination, and improve surface stability. Characterization will rely on advanced techniques such as X-ray Photoelectron Spectroscopy (XPS), Hard X-ray Photoelectron Spectroscopy (HAXPES), and Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS), complemented by electrical and electrochemical measurements. Particular attention will be paid to establishing quantitative correlations between the chemical composition of interfaces, their electrochemical properties, and their electrical behavior. These results will help identify the key parameters governing photodiode performance and optimize passivation treatments. The developed processes will then be evaluated on structures representative of P-i-N photodiodes, particularly with a view to operation at elevated temperatures. Finally, this thesis incorporates an eco-innovation component aimed at making manufacturing processes more environmentally friendly. The development of in-situ electrochemical treatments and new, so-called “green” chemistries could make it possible to replace certain conventional bromine-based solutions. Ultimately, this research will contribute to the development of higher-performance, more stable infrared detectors that require less demanding cooling systems, while potentially reducing the environmental impact of manufacturing processes.