احسان رجب زاده تيمورلوئي

In this thesis, the dielectric properties of selenium-based semiconductor capacitors were investigated. The research primarily focused on measuring and analyzing the impact of reducing crystal size on the dielectric capacity and loss factor under varying temperature and frequency conditions. Materials were synthesized using chemical and physical methods and then formed into capacitors that underwent reliable electrical testing. Analyses showed that reducing crystal size increased dielectric capacity and decreased the loss factor, improvements that could enhance the efficiency of capacitors in electronic applications. Raman spectroscopy was used to confirm the crystalline structure and synthesis quality of materials, and X-ray diffraction was employed to eva‎luate the crystalline structure of the capacitors. This study has led to a better understanding of the impact of crystal size on the dielectric properties of capacitors and has offered suggestions for future research that could advance energy storage technologies.

خازن‌هاي نيمه‌هادي , خواص دي‌الكتريكي , مواد مبتني بر سلنيوم , تأثير اندازه كريستال , مشخصه‌يابي الكتريكي

Semiconductor Capacitors , Dielectric Properties , Selenium-based Materials , Crystal Size Effect , Electrical Characterization

Ehsan Rajabzadeh teymourlooyi

Dr. M. Zamani