This course focuses on the understanding of the dielectric materials and organic devices. Topics include microscopic origin of the polarization, relationship with macroscopic dielectric constant, dielectric dispersion, electronic conduction in the dielectrics and the application of the dielectric materials. And also include fundamentals of organic semiconductor, electronic conduction mechanism, and various organic device applications. The course enables students to understand and acquire the fundamentals of dielectric materials and devices.
Dielectrics are one of the key materials to fabricate electronic devices. Organic semiconductor basically has a nature of dielectric materials because of low carrier density. Therefore the deep understanding of the dielectric materials is also necessary to study such state-of-art devices. I hope students have an interest in the electronic phenomena in various materials.
By the end of this course, students will be able to:
1) Understand the polarization of material, the origin of dielectric constant and dielectric dispersion.
2) Give specific applications of dielectric materials.
3) Explain the model of electronic conduction in the dielectrics and organic semiconductors.
4) Explain the operating principles of various organic devices.
polarization, dielectric constant, dielectric dispersion, ferroelectric materials, organic semiconductor, carrier transport, organic transistor, organic electroluminescent device, organic solar cell
|✔ Specialist skills
|Critical thinking skills
|Practical and/or problem-solving skills
At the beginning of each class, the lecture in the previous class will be reviewed. Students are requested to find and introduce topical papers. Students are given exercise problems related to the lectures.
|Polarization in ｍaterials
|Understand chemical bonds, electrostatic interaction and the origin of electric polarization.
|Polarization and dielectric properties
|Understand various polarizations and its origin.
|Transient response of the polarization
|Understand the local field, Lorentz–Lorenz equation, time-dependent polarization
|Dynamic polarization and its measurement
|Understand Cole-Cole plot, impedance spectroscopy and dielectric dispersion
|Carrier injection and transport in dielectrics
|Understand the energy structure of dielectrics, electrical contact between metal and dielectrics, and various electrical conduction
|Understand symmetry of crystals, ferroelectric phenomena (incl. how to measure), piezoelectric phenomena (incl. stress and strain)
|Application of dielectric materials
|Understand the electrets (incl. materials for electrets, TSDC), liquid crystals, electrooptic effect
|Test level of understanding with exercise problems and summary of the first part of the course
|Test level of understanding and self-evaluate achievement for classes 1–7.
|Organic semiconductor materials 1
|Understand the history of organic semiconductor and the electronic structure of organic semiconductors
|Organic semiconductor materials 2
|Understand the difference between inorganic and organic semiconductors, carrier transport in OSC (incl. band transport, polaron transport), and mobility measurements
|Measurement technique for the organic semiconductor devices
|Understand various techniques for organic devices (incl. TRM-SHG, mobility anisotropy, CMS)
|Organic thin-film transistor (OTFT)
|Understand the device operation of OTFT, fabrication of OTFT, development (history) of OTFT research
|Organic electroluminescent device (OEL)
|Understand the operation mechanism of OEL, application
|Organic solar cell (OSC)
|Understand the operation mechanism of OSC, application
|Other organic devices
|Discussion based on related papers
No specific textbooks. All lecture notes can be downloaded from OCW.
Denki Denshi Zairyo Kogaku, M. Iwamto ed., Ohm-sha
Based on the term end examination and quizzes carried out during the classes. Evaluation ratio between examination and quizzes are 70:30.
Nothing in particular, other than general physics of undergraduate level.