Presently working at STQC DIRECTORATE as a scientist
Written cleared BARC , ISRO , BEL,  BSNL JTO, NIELIT ,AAI 
ESE -2017 (Rank -36)

Smita Gupta

In this course, Smita Gupta discusses the basics of semiconductors in the easiest way. The course will be beneficial for GATE (ECE) aspirants.

GATE (Graduate Aptitude Test in Engineering) 2020 & 2021 complete preparation with best educators. Know about the detailed syllabus, best books, exam pattern and dates, previous year question papers a

GATE & ESE

Hindi

(Hindi) Basics of Semiconductors: GATE (ECE)

Semiconductor Physics

Electronic Devices

GATE & ESE - EE, EC

GATE, ESE and IIT-JAM

Ace the toughest competitive and government exams in India 

Test Preparation

Basics of Semiconductor (in Hindi)

Temperature , thermal voltage , Boltzmann's constant

Basics Terms in Semiconductor Physics (in Hindi)

Energy gap in semiconductor , metal and insulator and effect of temperature on energy gap in case of semiconductor and metal

Basics- Energy Gap, Electron Volt (in Hindi)

Detailed explanation of electron volt , electric field intensity

Electron Volt, Electric Field Intensity (in Hindi)

Numerical to find electric field of a uniform semiconductor bar

Question on Electric Field Intensity (in Hindi)

Current and drift current , mobility , drift velocity, reason why electron mobility is greater than hole mobility

Current, Drift Current (in Hindi)

Application of Ge and Si , effect of temperature on Mobility and effect of doping on Mobility

Ge and Si , Mobility (Temperature Effect and Doping Effect) (in Hindi)

Effect on Mobility due to different types of scattering effect ( impurity scattering, lattice scattering, surface scattering ) , relaxation time

Effect of Scattering on Mobility (in Hindi)

Effect on Mobility due to electric field and effect of electric field on drift velocity with graph

Effect of Electric Field on Mobility and Drift Velocity (in Hindi)

Einstein equation , diffusion constant for charge carrier with unit and temperature effect on the ratio of diffusion and mobility

Einstein's Equation (in Hindi)

Mass action law - applicability of the mass action law

Mass Action Law (in Hindi)

Intrinsic concentration - dependency of intrinsic concentration on temperature , energy gap , electrical properties of Ge and Si

Intrinsic Concentration, Electrical Properties of Ge and Si (in Hindi)

Why silicon is more suitable element , leakage current in detailed

Why SI is More Suitable Semiconductor Material, Leakage Currents (in Hindi)

resistivity and conductivity , current density , dependency of conductivity on different parameters

Resistivity and Conductivity, Current Density (in Hindi)

conductivity sensitivity , diffusion current, length of diffusion , length of diffusion depends on which function

Conductivity Sensitivity, Diffusion Current, Length of Diffusion (in Hindi)

diffusion current density due to hole and electron,  electron diffusion current , hole diffusion current , total current and Current density in semiconductor

Diffusion Current Density (in Hindi)

Numerical (in Hindi)

Numerical 2 (in Hindi)

Numerical 3 (in Hindi)

Detailed explanation of intrinsic semiconductor

Intrinsic Semiconductor (in Hindi)

intrinsic conductivity, intrinsic resistivity , generation and recombination of EHP (electron hole pair) , carrier life time, disadvantage of pure semiconductor

Intrinsic Conductivity, Intrinsic Resistivity , Generation and Recombination of EHP (in Hindi)

Doping , standard doping level ,impurity profile explanation

Extrinsic Semiconductor (in Hindi)

two different types of doping- uniform doping and non uniform doping

Two Different Types of Doping (in Hindi)

Brief explanation of Compound semiconductor ( GaAs and GeSi crystal)

Compound Semiconductor (in Hindi)

N type semiconductor- formation of donar energy level

N Type Semiconductor (in Hindi)

N type semiconductor- donar level ionisation , carrier concentration (n) in terms of donar impurity atom

N Type Semiconductor - Part 2 (in Hindi)

P type semiconductor - acceptor energy level , acceptor level ionisation

P-Type Semiconductor (in Hindi)

P type semiconductor continue... , Representation of n type semiconductor, representation of p type semiconductor , law of electrical neutrality

P Type Semiconductor- Part 2 (in Hindi)

Numerical 4 ( based on finding conductivity of n type and p type semiconductor )

Numerical 4 (in Hindi)

To calculation of electron and hole concentration in extrinsic semiconductor in different cases (in Hindi)

To calculate electron and hole concentration (in Hindi)

Derivation to get minimum conductivity , derivation to get doping concentration at minimum conductivity (in Hindi)

Derivation to get minimum conductivity & doping-concentration to get minimum conductivity (in Hindi)

Minority carrier injection and Numerical question (in Hindi)

Minority carrier injection (in Hindi)

Effect of temperature and doping concentration on intrinsic semiconductor and extrinsic semiconductor ( in Hindi)

Effect of doping on carrier concentration and conductivity (in Hindi)

Detailed explanation of temperature effect on conductivity of extrinsic semiconductor with example (in Hindi)

Effect of temperature on majority and minority carriers (in Hindi)

Equation to get electron and hole concentration , effective mass , some points about holes (in Hindi)

Concentration of electron and hole (in Hindi)

Fermi energy, derivation to get intrinsic concentration , Numerical question based on compensated semiconductor ( in Hindi)

Fermi energy, intrinsic concentration derivation of semiconductor (in Hindi)

Fermi Dirac distribution curve & equation , equation to get electron and hole concentration (in Hindi)

Fermi dirac distribution curve ( in Hindi)

Numerical 5 (in Hindi)

Detailed explanation of Fermi energy in intrinsic semiconductor and it's dependancy with temperature ( in Hindi)

Detailed explanation of Fermi level in intrinsic semiconductor (in Hindi)

Fermi energy level in n type semiconductor , energy band diagram, dependancy of Fermi energy level with temperature (in Hindi)

Detailed explanation for Fermi energy level in n type semiconductor ( in Hindi)

Fermi energy level of n type semiconductor , energy band diagram, temperature dependancy of Fermi energy

Effect of doping on Fermi energy level of n type semiconductor (in Hindi)

Fermi energy level in p type semiconductor , energy band diagram representation, effect on Fermi energy level with temperature (in Hindi)

Detailed explanation of Fermi energy for p type semiconductor (in Hindi)

Effect on Fermi energy level due to doping-concentration in p type semiconductor , position of Fermi energy level w r t intrinsic Fermi energy level (in Hindi)

Effect of doping in p type semiconductor Fermi energy (in Hindi)

Effect of light on intrinsic and extrinsic semiconductor , critical wavelength , minority carrier generation due to light ( generation rate ) with numerical ( in Hindi)

Effect of light on intrinsic and extrinsic semiconductor (in Hindi)

Minority carrier generation when light falls on extrinsic semiconductor, diffusion length and carrier life time ( in Hindi)

Minority carrier generation due to light (in Hindi)

Numerical 6

Numerical 7

Intrinsic and extrinsic excitation in semiconductor, indirect and direct band gap semiconductor, drift velocity , mobility (in Hindi)

Intrinsic and extrinsic excitation , indirect and direct semiconductor (in Hindi)

Pursuing B.Tech in Electronics and Communication from Lovely Professional University,  M.D at Club Illuminati.

Suraj Kumar Singh

This course covers Digital Electronics and Logic Gates.

Course on Digital Electronics

ME in Electronics and Communication  from SRTMU,Nanded|Worked as a lecturer in Government Polytechnic College|Now educator at Unacademy.

Komal Shinde

Basic Electronic Components (Solid State Devices)

Pursuing BTech from Ajay kumar Garg Engineering College. Have a good experience in teaching. Love to travel, sing .

Vishesh Maheshwari

In signal processing, data compression, source coding, or bit-rate reduction involves encoding information using fewer bits than the original representation. Compression can be either lossy or lossless. This course is about various compression techniques, and related algorithms.

Data Compression Techniques and its Algorithm

Currently serving The Nation as IES Officer. Worked in BEL, ONGC and went to IIT Roorkee for M.Tech. I love reading, traveling and Cricket. 

Vipin Kumar

This course explains optical behaviour of Semiconductor,optical devices,display Devices, Lasers

(Hindi) Optoelectronics - ESE - E and T Engineering

1000+ GATE lectures•University Syllabus Coverage•M.tech, B.tech (ECE), Former automation engineer•Jony Ive Award’18, Top Educator’17

Jigyasa Singh

The weightage of Digital Electronics in GATE is 8-12 marks. Hence, Jigyasa is presenting a a course to cover an important topic of this subject i.e. IC fabrication process. She takes you through led, solar cell, photolithography, etching, gate questions and much more.

(Hindi) Part 4: Electronic Devices and Circuits - Special Diodes and IC Fabrication

Follow me and Learn Electrical Engineering.
use code " MACHINE20" to attend my Classes.
and Make Electrical your Passion

Ravendra Yadav

In this course we will be discussing about the questions asked in 2016 ESE in E & T Engineering in Electronic Devices and circuits.

Lessons

48 lessons • 7h 39m