SEMICONDUCTOR PHYSICS AND DEVICES

Module SEMICONDUCTOR DEVICES

Aim of this course is to provide students with advanced knowledge of Physics of semiconductor materials and related technologies.

For what concerns the above subjects of Physics and Technologies of semiconductors, the course will promote the following skills: 

- knowledge and understanding. Critical understanding of the most advanced developments of Modern Physics, both theoretical and experimental, and their interrelations, also across different subjects. Adequate knowledge of advanced mathematical and numerical tools, currently used in both basic and applied research. Remarkable acquaintance with the scientific method, understanding of nature, and of the research in Physics.

- applying knowledge and understanding. Ability to identify the essential elements in a phenomenon, in terms of orders of magnitude and approximation level, and being able to perform the required approximations. Ability to use analogy as a tool to apply known solutions to new problems (problem solving). Ability to plan and apply experimental and theoretical procedures to solve problems in academic or applied research, or to improve existing results. 

- making judgements. Ability to work with increasing level of independence, also undertaking responsibility in planning and managing projects. Ability to convey own interpretations of physical phenomena, when discussing within a research team. Developing one's own sense of responsibility, through the choice of optional courses and of the final project.

- communication skills. Ability to discuss about advanced physical concepts, both in Italian and in English. Ability to present one's own research activity or a review topic both to an expert and to an non-expert audience.

- learning skills. Ability to acquire adequate tools for the continuous update of one's knowledge. Ability to access to specialized literature both in the specific field of one's expertise, and in closely related fields. Ability to exploit databases and bibliographical and scientific resources to extract information and suggestions to better frame and develop one's study and research activity.

Lectures (LIM slides available). Seminars. 

Visit to research labs at DFA.

Should the circumstances require online or blended teaching, appropriate modifications to what is hereby stated may be introduced, in order to achieve the main objectives of the course.

Exams may take place online, depending on circumstances.

IMPORTANT: basic knowledge of Condensed Matter Physics  

IMPORTANT: basic knowledge of Quantum Mechanics 

IMPORTANT: basic knowledge of Semiconductor Physics

USEFUL: basic knowledge of Statistical Mechanics 

Schottky diode

Metal/oxide/semicondutors systems - MOS capacitance - Flat band voltage

pn junction at equilibrium: band bending, depletion region, internal electric field

pn junction out of equilibrium: direct and inverse polarization, minority charge carriers injection and extraction, Shockley law: IV curve

pn junction: quasi Fermi level, CV curve, jnuction breakdown, transient behavior

Metal-oxide-semiconductor field-effect transistor (MOSFET): working principles and CV characteristics. Threshold Voltage - junction field effect transistor (JFET)

Charge Coupled Devices (CCD)

High electron mobility transistor (HEMT)

B. Sapoval, C. Hermann - Physics of Semiconductors - Springer-Verlag

S.M. Sze - Physics of Semiconductor Devices (3rd edition) - Wiley

L. Colombo - Fisica dei semiconduttori - Zanichelli

K. B. Oldham, J. C. Myland - Fundamentals of Electrochemical Science - Academic Press

Following questions are examples and do not represent an exhaustive list

Charge carriers statistics in doped semiconductors

Light absorption by free carriers

Effective mass

pn junction

Gas sensor based on semiconductors - gas/semiconductor interface

Electrochemical sensors - liquid/semiconductor interfaces