Whether Ge doped with P forms an n-type and a p-type semiconductor is to be determined. Concept introduction: Semiconductors are metalloid and have less energy difference between the valence band and conduction band. The electrons move from valence band to conduction band when potential is applied and the current follows through the semiconductor. The conductivity of a semiconductor can be increased by doping. Doping is the process in which another element to the host element to increase or decreases the number of valence electrons for conductivity. Doping can lead to the formation of two types of semiconductor as follows: 1. n-type conductor 2. p-type semiconductor

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Chapter 12, Problem 12.117P

(a)

Interpretation Introduction

Interpretation:

Whether Ge doped with P forms an n-type and a p-type semiconductor is to be determined.

Concept introduction:

Semiconductors are metalloid and have less energy difference between the valence band and conduction band. The electrons move from valence band to conduction band when potential is applied and the current follows through the semiconductor.

The conductivity of a semiconductor can be increased by doping. Doping is the process in which another element to the host element to increase or decreases the number of valence electrons for conductivity. Doping can lead to the formation of two types of semiconductor as follows:

1. n-type conductor

2. p-type semiconductor

(b)

Interpretation Introduction

Whether Si doped with In forms an n-type and a p-type semiconductor is to be determined.

Concept introduction:

Semiconductors are metalloid and have less energy difference between the valence band and conduction band. The electrons move from valence band to conduction band when potential is applied and the current follows through the semiconductor.

The conductivity of a semiconductor can be increased by doping. Doping is the process in which another element to the host element to increase or decreases the number of valence electrons for conductivity. Doping can lead to the formation of two types of semiconductor as follows:

1. n-type conductor.

2. p-type semiconductor.

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