The energy level diagrams for the two separate light-emitting diodes (LEDs) are provided. Using the band-gap between the conduction and valences bands in each LED, determine which will release blue light and which will release red light. Concept introduction: A diode is a doped semiconductor that converts alternating current to direct current using a p-type semiconductor in contact with an n-type semiconductor to give a p-n junction. This keeps the electrons flowing heavily in one direction. A light-emitting diode (LED) is a diode that emits energy in the form of light when electrons and holes combine in the p-n junction of a diode. An n-type semiconductor is a semiconductor that is doped with an element with extra electrons which uses the electrons as charge carriers, which are negatively charged. A p-type semiconductor is a semiconductor that is doped with an element with less valence electron, which results in charge carriers that are positive holes. To classify: The LED that releases red light and the one that releases blue light.

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Chapter 21, Problem 21.23CP

Interpretation Introduction

Interpretation:

The energy level diagrams for the two separate light-emitting diodes (LEDs) are provided. Using the band-gap between the conduction and valences bands in each LED, determine which will release blue light and which will release red light.

Concept introduction:

A diode is a doped semiconductor that converts alternating current to direct current using a p-type semiconductor in contact with an n-type semiconductor to give a p-n junction. This keeps the electrons flowing heavily in one direction.
A light-emitting diode (LED) is a diode that emits energy in the form of light when electrons and holes combine in the p-n junction of a diode.
An n-type semiconductor is a semiconductor that is doped with an element with extra electrons which uses the electrons as charge carriers, which are negatively charged.
A p-type semiconductor is a semiconductor that is doped with an element with less valence electron, which results in charge carriers that are positive holes.

To classify:The LED that releases red light and the one that releases blue light.

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