Diode - pn Junction and Metal Semiconductor Contact

Go to Course: https://www.coursera.org/learn/diode-pn-junction-metal-semiconductor-contact

Introduction

### Course Review: Diode - PN Junction and Metal Semiconductor Contact If you are seeking an advanced understanding of semiconductor technology, particularly in the realm of pn junctions and metal-semiconductor contacts, the Coursera course "Diode - PN Junction and Metal Semiconductor Contact" is an exceptional choice. Designed as part of CU Boulder’s Master of Science in Electrical Engineering, this course offers an in-depth exploration of fundamental concepts and practical applications in electronic devices. #### Course Overview This course dives deep into the physics of pn junctions and metal-semiconductor contacts. It covers myriad topics, including equilibrium behavior, current and capacitance responses, breakdown phenomena, and non-ideal behaviors. Each section is crafted to enrich both your theoretical knowledge and analytical skills, preparing you for real-world applications in electronic and optoelectronic devices. #### Key Learning Modules 1. **PN Junction at Equilibrium** This module lays the groundwork for understanding the structure and behavior of pn junctions at equilibrium. By studying device structure, energy band diagrams, and the depletion approximation, learners gain foundational insights crucial to mastering more complex concepts. Advanced topics like Poisson's equation add depth, ensuring a comprehensive understanding of the subject. 2. **PN Junction Under Bias** The exploration of pn junction behavior under bias marks a significant leap into practical applications. Here, learners will engage with topics such as avalanche breakdown, tunneling current, and the ideal diode equation. By analyzing capacitance-voltage characteristics and understanding non-ideal current behaviors, students solidify their grasp of how these junctions operate in real-life scenarios. 3. **Metal-Semiconductor Contact** Understanding metal-semiconductor contacts is critical for those venturing into modern electronics. This module discusses equilibrium energy band diagrams and details the electrostatic analysis and dynamics under bias, including the phenomena that lead to Schottky contacts and Ohmic contacts. Such knowledge is invaluable for applications in device engineering and semiconductor technology. 4. **Optoelectronic Devices** As the course culminates, learners shift focus towards optoelectronic devices such as LEDs, photodiodes, and solar cells. Understanding the basic principles behind these technologies, including the conditions for net stimulated emission in lasers, prepares students for cutting-edge innovations in solid-state lighting and renewable energy solutions. #### Who Should Enroll? This course is well-suited for graduate students, early-career engineers, and anyone with a foundational knowledge of electrical engineering looking to deepen their understanding of semiconductor physics. The course's academic credit option adds an enticing benefit for those pursuing advanced degrees or looking to enhance their practical qualifications. #### Strengths of the Course One of the most commendable aspects of this course is its blend of theoretical frameworks with practical applications. Instructors present complex concepts clearly, supplemented by rich graphical depictions like energy band diagrams that aid comprehension. This pedagogical approach ensures that learners are not just absorbing theories but also applying them in meaningful contexts. The course's potential for academic credit is an added advantage, allowing participants to integrate their learning into a formal education pathway. #### Conclusion and Recommendation Overall, "Diode - PN Junction and Metal Semiconductor Contact" on Coursera stands out as a rigorous and informative course that equips learners with essential knowledge in semiconductor technology. The depth of content, guided by experienced instructors, coupled with practical applications, makes this course highly recommendable for anyone looking to enhance their expertise in this dynamic field. Whether you're aiming to further your education, advance your career in electrical engineering, or simply explore a significant area of technology, enrolling in this course is a step towards building a solid foundation in semiconductor devices and optoelectronics. Don't miss the opportunity to engage deeply in the science of diodes and make your mark in the ever-evolving landscape of electronics!

Syllabus

PN Junction at Equilibrium

In this module, we look at pn junction in equilibrium. Topics include: Device structure for pn junction, Energy band diagram at equilibrium for pn junction, Depletion approximation for step junction, Poisson's equation for step junction, Energy band diagram of pn step junction, Beyond depletion approximation, Poisson's equation, Energy band diagram for linearly graded junction, Energy band diagram for heterojunction, and Effect of band alignment for heterojunction.

In this module on pn junction under bias, we will cover the following topics: Energy band diagram of pn junction under bias, Capacitance-voltage characteristics, Impact ionization, Avalanche breakdown, Avalanche breakdown voltages, Tunneling current, Zener breakdown, Energy band diagram of pn junction under forward bias, Continuity equation, Boundary conditions, Ideal diode equation, Long- and short-base diodes, Recombination and generation in depletion region, Non-ideal current, Effect of band alignment, and Diffusion and thermionic emission currents.

In this module on metal semiconductor contacts, we will cover the following topics: Device structure, Equilibrium energy band diagram, Electrostatic analysis, Energy band diagram under bias, Capacitance-voltage characteristics, Image charge, Dependence of barrier height on electric field, Energy band diagram of Schottky contact under bias, Thermionic emission current, Ohmic contact by heavy doping in semiconductor, Ohmic contact by low metal work function, Surface states, Fermi level pinning.

In this module on LEDs, we will cover the follow topics: Basic operating principles of LEDs, Survey of LEDs, Blue LED and solid state lighting, Basic principle of semiconductor laser, Condition for net stimulated emission, Types of semiconductor laser, Photodiode, Avalanche photodiode, Solar cell operating principle, and I-V characteristics and power output.