Consumer Electronics · SHS2 General Science

Lesson notes

Learning Objectives

Indicator: 2.3.3.LI.1 - Explain the principle of ‘doping’ behaviour in relation to semiconductors.

By the end of the lesson, learners can:

Classify given solid materials as conductors, insulators, or semiconductors and justify their classification using the concept of electrical conductivity.
Explain what doping means in the context of semiconductors and state the purpose of doping.
Distinguish between n-type and p-type semiconductors by describing the dopant elements used and the charge carriers produced.
Use diagrams of a P-N junction diode to explain how doping causes the formation of the depletion region and one-way current flow.
Give at least two practical examples of semiconductors in household electronics (for example LEDs, phone chargers, radios) and link their functioning to doping.

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Curriculum details

Strand: Vigour Behind Life (Strand 3)
Sub-strand: Consumer Electronics (3.3)
Content standard: 2.3.3.CS.1 - Demonstrate knowledge and recognition of selected electronic components and their uses in household electronic devices. 2.3.3.LO.1 Apply the knowledge of doping to explain the formation and behaviour of a P- N junction diode.
Indicator: 2.3.3.LI.1 - Explain the principle of 'doping' behaviour in relation to semiconductors.
Suggested placement: Semester 2, Week 7 (Week 27 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 80

Exemplars (from the NaCCA curriculum)

- Engage learners through Talk For Learning strategies to classify solid materials into conductors, insulators and semiconductors using simulations, charts and videos. While managing the words/terms that look technical or may be perceived as 'masculine'.
- Lead learners through demonstrations and group discussions using concept maps, practical activities and simulations to explain the concept of doping and its applications to the behaviour of P-N junction diode formation in consumer electronics.
Teaching and Learning Resources:
- Simulations
- Charts of solid materials
- videos
- P-N junction diodes.
- LEDs
- Diodes
- Resistors
- Capacitors
- Connecting wires
- Circuit board
- Breadboards
- Plastic materials
- Tester
- Metal leads.
Assessment (2.3.3.AS.1). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding.