Quantum Workshop III: LED Circuit and Device Physics

By Stella Quinones

University of Texas at El Paso

Download (PDF)

Licensed according to this deed.

Published on


A hands-on learning exercise used to illustrate the device physics of a light emitting diode (LED) in a simple resistor circuit.  Students explore the photon energy of four LEDs, compare the voltage drop (or forward bias) across the LED, and explain the behavior of the LED under reverse bias using the energy band diagram of a PN junction.


Dr. Stella Quinones is an Associate Professor of Electrical and Computer Engineering at The University of Texas at El Paso (UTEP) where she has been a faculty member for the past 17 years.  Her research areas include the effect of Zn doping on selective nanoscale CdTe deposition on CdTe(111), Si(100), Si(111) and Si(211) using a conventional close-spaced sublimation (CSS) technique for applications related to solar cells, x-ray imaging and infrared detectors, along with contributions to engineering education.

Cite this work

Researchers should cite this work as follows:

  • Stella Quinones (2015), "Quantum Workshop III: LED Circuit and Device Physics," https://nanohub.org/resources/21909.

    BibTex | EndNote