### 2020　Semiconductor Physics

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Graduate major in Electrical and Electronic Engineering
Instructor(s)
Course component(s)
Lecture    (ZOOM)
Day/Period(Room No.)
Tue5-6(W631)  Fri5-6(W631)
Group
-
Course number
EEE.D411
Credits
2
2020
Offered quarter
2Q
Syllabus updated
2020/9/18
Lecture notes updated
-
Language used
English
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### Course description and aims

In the course, the drift and diffusion current are derived from the Boltzmann equation, and students understand the relationship between the mobility and diffusion coefficient, and the relaxation time. In the second part, the band structure of solids is explained by the chemical bonding point of view. The explanation facilitates students’understanding of the origin of effective mass and optical properties of solids. In the final part, the physics of the semiconductor heterojunction is shown.

The aim of this course is the deep understanding of electrical and optical properties of solids.

### Student learning outcomes

At the end of this course, students will be able to
1) understand the physics of mobility and diffusion coefficient, and explain the relaxation time.
2) explain the relationship between atomic orbitals and band structure.
3) draw the band diagram of semiconductor heterojunction, and explain the electrical conduction at the heterojunction.

### Keywords

Boltzmann equation, relaxation time, chemical bonds, band structure, heterojunction, electrical conduction

### Competencies that will be developed

 ✔ Specialist skills Intercultural skills Communication skills Critical thinking skills ✔ Practical and/or problem-solving skills

### Class flow

At the beginning of each class, the previous class is reviewed. At the end of the lecture, an assignment is given.

### Course schedule/Required learning

Course schedule Required learning
Class 1 Basics of electrical transport in solids Explain the mobility.
Class 2 Basics of Boltzmann equation Explain the phase (position-velocity) space.
Class 3 Derivation of Boltzmann equation Derive the Boltzmann equation.
Class 4 Drift and diffusion current Derive the drift and diffusion current.
Class 5 Physical property of relaxation time Explain the relaxation time.
Class 6 Basics of band structure Explain the relationship between the wavenumber and energy.
Class 7 Review of quantum mechanics Explain the Hamiltonian.
Class 8 Basics of chemical bonds Derive the bonding and antibonding orbitals.
Class 9 Electronic band structure and chemical bonds Explain bonds and bands in semiconductors.
Class 10 Band structure based on chemical bonding Explain the band structure.
Class 11 Electrons and holes, effective mass, optical properties of solids Explain the heterostructure and lattice mismatch.
Class 12 Band diagram of heterojunction Draw the band diagram of heterojunction.
Class 13 Electrical conduction at the heterojunction Explain the I-V characteristics at the heterojucntion.
Class 14 Transistors, solar cells, quantum wells Explain the operating principles of heterojunction devices.

### Out-of-Class Study Time (Preparation and Review)

To enhance effective learning, students are encouraged to spend approximately 100 minutes preparing for class and another 100 minutes reviewing class content afterwards (including assignments) for each class.
They should do so by referring to textbooks and other course material.

### Textbook(s)

Specified by the academic supervisor, as necessary

### Reference books, course materials, etc.

Specified by the academic supervisor, as necessary.

### Assessment criteria and methods

Determined by the student outcomes 1) to 3).
Student’s course scores are given based on the final examination.

### Related courses

• EEE.D211 ： Semiconductor Physics

No prerequisite.