Hi I'm practising past papers however have no answers.
one of the questions says:
Why can a p-n junction connected in series with an n-p junction not act as an p-n-p transistor.
My only thoughts were that the base element must be thin (approx 10 wavelengths of light) and in thus in this...
Hi
I need circuit diagrams for studying P-N junction & Zener Diode under forward and reverse bias. I know they are available on Google, but I had a few questions, and if I understand the answers, I won't need circuit diagrams.
1. a) Some circuit diagrams have a rheostat connected in series...
Hello all,
I am somewhat confused in understanding the depletion region of a p-n junction diode.Everywhere a depletion region is defined as a region near the p-n junction which is devoid of charge carriers.And the formation of this region is said is explain that it is due to the diffusion of...
Homework Statement
A pn junction diode has saturation current Is= 1e-12 A. What is the current through this diode if a positive voltage 0.68 V is applied to it? (Unit: A)
Homework Equations
I=Is(e(Vd)/(Vt))-1)
The Attempt at a Solution
I don't even know where to begin, but i just...
Hi guys,
I just have a few questions regarding semiconductors and p-n junctions.
How can I explain using an E vs k diagram why a silicon based device can be an efficient light detector but not an efficient light emitter? I imagine it has something to do with the fact that an electron in the...
"...Recall that the n-side is studded throughout with positively charged donor ions, fixed firmly in their lattice sites. Normally, the excess positive charge of each of these ions is compensated electrically by one of the conduction band electrons. When an n-side electron diffuses across the...
I understand that for a semiconductor p-n junction under zero voltage, the Fermi level is constant throughout the junction because that is the condition for a system in thermodynamic equilibrium.
I also understand that p-n junction under applied voltage (forward or reverse) is not a system in...
Hello all,
I've been tasked with drawing the I-V characteristics of a silicon p-n junction diode and I've managed to do that fine.
Now, I've been tasked with showing how this curve will vary with temperature (200-400 deg.c) and by illumination with light of photon energy greater than the...