Understanding Semiconductor Junctions in Modern Electronics

This course explores the fundamental physics of semiconducting materials and how they are used to create electronic devices. It begins with an introduction to the structure and properties of semiconductors, including concepts such as energy bands, charge carriers, and conductivity. The course then explains the formation and working principles of the P–N junction, which is the building block of many semiconductor devices. Participants will learn how electrons and holes behave within the junction and how this affects current flow. The characteristics of P–N junction devices under dark conditions are studied to understand their basic electrical behavior. The course also examines how these devices respond to light and how illumination influences their performance. Special attention is given to photovoltaic effects and light-generated current in semiconductor devices. Learners will understand how P–N junctions are used in diodes, solar cells, and photodetectors. Practical insights into device characteristics, efficiency, and real-world applications are also discussed. By the end of the course, participants will gain a clear understanding of semiconductor device physics and their importance in modern electronics and optoelectronic technologies.