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Semiconductors in the Information Age

5. Semiconductor Devices from Diodes to Microchips

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In this mini-lecture, we discuss how to get from a diode to a transistor to a microchip to a computer, focusing in particular on: (i) diodes, which involve a PN-junction with the voltage reversed; (ii) useful formulas for understanding transistors, such as the Drude formula; (iii) graphene field-effect transistors; and (iv) how connecting billions of transistor logic circuits gives you the microchip that is used in your computer.


In this course Professor Oleg Makarovskiy (University of Nottingham) explores semiconductors and their relevance in the current Information Age. In the first mini-lecture, we introduce the ages of human advancement, from the Stone Age up until the current Information Age, and consider the advancements in computers and information made in the 20th century. In the second mini-lecture, we discuss what a semiconductor is and how you can make one using electrons and ‘holes.’ In the third mini-lecture, we consider how semiconductors can be used to create light of various colours (LEDs) and transform light into electrical energy (solar cells). In the fourth mini-lecture, we explore how we can control semiconductor colour and how we can make low-dimensional semiconductors, such as quantum dots. In the fifth mini-lecture, we focus on understanding diodes and transistors and how these can be used to create microchips used in computers. Finally, in the sixth mini-lecture, we consider the next advancement in our Information Age, quantum information technology, and the role semiconductors play in this new Quantum Information Age.


Oleg Makarovskiy is an Associate Professor in the School of Physics & Astronomy at the University of Nottingham. His research focuses on experimental semiconductor physics, quantum phenomena in semiconductor nanostructures, and their applications in functional electronic and optoelectronic devices.

Cite this Lecture

APA style

Makarovskiy, O. (2022, January 25). Semiconductors in the Information Age - Semiconductor Devices from Diodes to Microchips [Video]. MASSOLIT.

MLA style

Makarovskiy, O. "Semiconductors in the Information Age – Semiconductor Devices from Diodes to Microchips." MASSOLIT, uploaded by MASSOLIT, 25 Jan 2022,

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