Electronic Devices: Energy band diagram concepts

[@crediblehuman9753]

Thank you! Very clear!

[@cschandu123]

I am loving these videos. Thank you so much. I could solve gate questions by learning these concepts which I was not able to solve earlier. You are a gem bro highly gifted.

[@spandandas7023]

kaise bhadwe

[@reemalshanbari]

Great! Thanks so much!

[@ieeebitspilani]

Great work

[@esraamohamed5601]

good job thank you !

[@romance177]

good explanation...thank you

[@mohammadmahdimovahedfar3245]

Thanks a lot.

[@nikitamakeev7201]

Could anybody draw a band diagram of the nonuniformly doped (say n-type) piece of semiconductor under bias voltage? (give a link to the picture)

[@rafap.3393]

Great video! Very clear and concise.

[@571ozgur]

Thanks you, you helped a lot :)

[@vivekssj3]

An advice to techgurukula , please do use cursor when you are explaining the things . It would be helpful for us. Thank you.

[@Arif_0899]

haha

[@mr.rachetphilanthrophist601]

yes,it is confusing at times

[@aniketanand6032]

nice lecture thank's.

[@korzhikmorzhik]

7:40 'so we can save that ass'..

[@nathanielsicard5421]

when you refer to the E as the electric field, is that exclusively magnitude and the direction is inherit to the tendency of electrons movement across the semiconductor? so the magnetic field as a vector would be the direction (either right to left of vice versa) and the magnitude would be the change in electric potential w/r/t the semiconductors length?

[@asifbhat3408]

Great job sir

[@Jarrod_C]

What happened when you took the dervitave to the exponential

[@kunalgarg8200]

what is a fermi energy level?

[@alvinaug3844]

i think at 5:08 if it is p type under same condition we get reverse slope.

[@harshavijay119]

Best ever

[@andrewfranklan2084]

I've noticed you used Einstein's relation at 12:10, which permitted you to progress towards obtaining the condition for the derivative of Ef. But haven't you considered said condition as given in the video in which you prove Einstein's relations? If I've seen it correctly this would force a loophole and one of the two proofs should be changed. Great video(s) apart from that, thanks for the good work!

[@Upgradezz]

Circular logic

[@saitejareddy1783]

Suuuuuuper

[@jayarammamidi4846]

Can any one help me for drawing band diagram for p type semiconductor under application of potential difference across it.. plz help me

[@jayarangarakesh4581]

please show us the cursor while explaining

[@mr.rachetphilanthrophist601]

Efp and Efn -aka quasi fermi levels , are in the syllabus of GATE and they are used in threshold voltage derivation of MOS capacitor,so don't say it beyond the scope of GATE.now GATE has increased it's level.

[@sandeepkumarsai7601]

Hello electron moves from lower potential to higher potential, so shouldn't energy levels connected to negative terminal of battery go down??

[@apoorvasrivastava583]

Same doubt....plz anyone reply over this

[@techgurukula]

@@apoorvasrivastava583 Energy band diagrams are drawn w.r.t electron energy (eV), and the potential definition is w.r.t to a Positive charge. Hence when -ve potential is applied Energy band should move up (for electrons it is higher).

[@artibisht370]

#@@techgurukula not satisfied with your ans please clarify

[@andrewfranklan2084]

Really late answer but maybe useful for the people to come. Electrons move towards higher potentials, that is correct. But energy bands do not represent potential, which is a property of space, but electron's potential energy, which is a property of the electron, obtained by the product potential*charge. Since electron's charge is negative, you can clearly see that potential energy will always be of opposite sign than potential. In this way, electrons will spontaneously move towards lower energies (like everything) and towards higher electric potentials (like every negatively charged particle). This is why, if you pick an energy band diagram, it is said electrons tend to "sink" to the bottom of the bands; there, their energy is lower. In case anyone was wondering, holes tend to "float" on top of the bands instead. This is because since the band diagram is drawn for electrons (negatively charged particles) you should think it mirrored with respect to the x-axis to obtain the energy band diagrams for positively charged particles (like holes).

[@padmar7906]

not clearly visible

[@abdo199199]

(Y)

[@harshitsaxena3186]

An advice to techgurukula , please do use cursor when you are explaining the things . It would be helpful for us. Thank you.