NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ1090066
Record Type: Journal
Publication Date: 2016-Mar
Pages: 7
Abstractor: As Provided
ISSN: ISSN-0031-9120
Electrical and Optical Measurements of the Bandgap Energy of a Light-Emitting Diode
Petit, Matthieu; Michez, Lisa; Raimundo, Jean-Manuel; Dumas, Philippe
Physics Education, v51 n2 Article 025003 Mar 2016
Semiconductor materials are at the core of electronics. Most electronic devices are made of semiconductors. The operation of these components is well described by quantum physics which is often a difficult concept for students to understand. One of the intrinsic parameters of semiconductors is their bandgap energy E[subscript g]. In the case of light-emitting diodes (LEDs) E[subscript g] fixes the colour of the light emitted by the diodes. In this article we propose an experiment to compare E[subscript g] of a green LED obtained by both electrical and optical measurements. The two slightly different results can be explained by the theoretical knowledge of students on solid physics and the internal structure of electronic devices.
Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive; Guides - Classroom - Teacher
Education Level: N/A
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A