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Electrical and Optical Measurements of the Bandgap Energy of a Light-Emitting Diode

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Title: Electrical and Optical Measurements of the Bandgap Energy of a Light-Emitting Diode
Language: English
Authors: Petit, Matthieu, Michez, Lisa, Raimundo, Jean-Manuel
Source: Physics Education. Mar 2016 51(2).
Availability: 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: info@ioppubusa.com; Web site: http://journals.iop.org
Peer Reviewed: Y
Page Count: 7
Publication Date: 2016
Intended Audience: Teachers
Document Type: Journal Articles
Reports - Descriptive
Guides - Classroom - Teacher
Descriptors: Science Instruction, Physics, Mechanics (Physics), Quantum Mechanics, Scientific Concepts, Energy, Light, Color, Science Experiments, Optics
DOI: 10.1088/0031-9120/51/2/025003
ISSN: 0031-9120
Abstract: 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.
Abstractor: As Provided
Number of References: 10
Entry Date: 2016
Accession Number: EJ1090066
Database: ERIC
FullText Text:
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  Data: Electrical and Optical Measurements of the Bandgap Energy of a Light-Emitting Diode
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  Data: 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: info@ioppubusa.com; Web site: http://journals.iop.org
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  Data: 10.1088/0031-9120/51/2/025003
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  Data: 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.
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