Electron Devices: Chapter 1: Semiconductor

Energy Band Diagram for Extrinsic Semiconductors

Home | Department: ECE Department | Ist Year | Subject: Electron Devices |

When impurities are added, allowable energy levels are introduced.

Energy Band Diagram for Extrinsic Semiconductors

• When impurities are added, allowable energy levels are introduced.

• In n‒type material, each donor atom donates one free electron and hence donor energy level is introduced just below the conduction band denoted as E_D.

• This is so close to the conduction band that even at room temperature, almost all the added electrons jump into conduction band.

• Thus probability of occupying energy level by an electron is very high near conduction band. Hence fermi level E_F shifts towards conduction band in n‒type material.

• While in p‒type material each acceptor atom creates hole in the valence band.

• This introduces accpetor energy level very close to valence band but just above it. It is denoted as E_A

• At room temperature, electrons from valence band jump to acceptor energy level creating holes in the valence band. This shifts the fermi level E_F towards valence band in p‒type material.

• The energy band diagrams for n and p‒type materials is shown in Fig. 1.10.1.

Electron Devices: Chapter 1: Semiconductor : Tag: electronics : - Energy Band Diagram for Extrinsic Semiconductors

Home | Department: ECE Department | Ist Year | Subject: Electron Devices |

<< Previous

Next >>

Electron Devices: Chapter 1: Semiconductor

Introduction of Semiconductor

Electron Hole Pairs - Semiconductor

Intrinsic Semiconductors - Crystal Structure, Thermal Generation, Conduction, Conductivity, Energy Band Diagram

Mobility of Charged Particle

General Expression for Conductivity

Conductivity of a Semiconductor

Intrinsic Concentration and Conductivity of Intrinsic Semiconductor

Extrinsic Semiconductor

Formation of Extrinsic Semiconductor Materials

Energy Band Diagram for Extrinsic Semiconductors

Drift Current and Diffusion Current - Semiconductor

Drift Current Density of a Semiconductor

Conductivity of Extrinsic Semiconductor

Law of Mass Action - Semiconductor

Equation of Charge Neutrality - Semiconductor

Diffusion Current and Diffusion Current Density - Semiconductor

Continuity Equation - Semiconductor

Potential Variation in a Continuously Graded Semiconductor

Semiconductor: Important Example Solved Problems - Electron Devices

Semiconductor: Two Marks Important Questions and Answers - Electron Devices

Semiconductor: Important Part B Questions - Electron Devices

Under Subject

Electron Devices

EC25C01 2nd Semester ECE Dept | 2025 Regulation | 2nd Semester 2025 Regulation

Related Subjects

English Essentials II

EN25C02 2nd Semester | 2025 Regulation | 2nd Semester 2025 Regulation

Tamils and Technology தமிழர்களும் தொழில்நுட்பமும்

UC25H02 2nd Semester | 2025 Regulation | 2nd Semester 2025 Regulation

Linear Algebra

MA25C02 2nd Semester | 2025 Regulation

Electron Devices

EC25C01 2nd Semester ECE Dept | 2025 Regulation | 2nd Semester 2025 Regulation

Data Structures using CPlusPlus

CS25C05 2nd Semester ECE Dept | 2025 Regulation | 2nd Semester 2025 Regulation

Circuits and Network Analysis

EC25C02 2nd Semester ECE Dept | 2025 Regulation | 2nd Semester 2025 Regulation

Re-Engineering for Innovation

ME25C05 2nd Semester | 2025 Regulation | 2nd Semester 2025 Regulation

Engineering Drawing - Laboratory

ME25C01 2nd Semester | 2025 Regulation | 2nd Semester 2025 Regulation

Data Structures using CPlusPlus - Laboratory

CS25C05 2nd Semester ECE Dept | 2025 Regulation | 2nd Semester 2025 Regulation

Devices and Circuits Laboratory

EC25C03 2nd Semester ECE Dept | 2025 Regulation | 2nd Semester 2025 Regulation