This lecture covers the fundamental concepts of organic electronics, including intramolecular electron delocalization, charge formation, and transport in organic materials. It delves into the working principles of organic field-effect transistors and photovoltaic devices, as well as the preparation of organic semiconductor materials. Advanced topics such as organic sensors, bioelectronics, and sustainable electronics are also discussed, highlighting the potential of organic electronics in various applications. The lecture emphasizes the challenges and opportunities in the field, showcasing the importance of organic materials in modern electronic devices.