Semiconductor devices Definition and 31 Threads

I have read myself through a lot of information on photovoltaics. Yet I still don't understand how it really works. From what I think I understand, the charge separation in PN junctions happens due to an electric potential build up in the depletion zone. Now according to a wikipage on organic...

Hello everyone, let me introduce myself, I'm new here. I have a few questions about semiconductor devices and was looking for a physics forum and found this site. I hope to find answers to my questions and help others if I can. I hope to find answers to my questions and help others if I can.

At the left side we have the n-side of the junction, whereas at the right we have the p-side. I am a little confused over $N_D$ and $N_A$ at the n-side. Do the Ga atoms interact with the As ones, so we have $N_D = 2*10^{16} \text{cm}^{-3}$, or not, ans thus we have $N_A=2*10^{16} \text{cm}^{-3}$...

Summary:: What is the advantage of transparent semiconductors such as Fluorine doped tin oxide over main semiconductors? What is the advantage of transparent semiconductors such as Fluorine doped tin oxide (FTO) and Indium tin oxide (ITO) over main semiconductors? Please explain the uses of...

I was recommended to read Physics of Semiconductor Devices by Sze which I was told was the standard textbook for the subject. My background is Electronic Engineering and not physics. After reading the first few pages of the first chapter I am completely overwelmed. I can't make sense of the...

Summary: I am trying to understand the pinch-off-region of an NMOS qualitatively as NPN-structure in punch-through I was always having trouble understanding what is going on in the pinch-off region of a MOS (say NMOS) Transistor. Now I recently figured out, that this could be described (at...

In pure crystals,such as,in silicon and germanium,the band gap is more than that in compound semiconductors,such as,GaAs.Why is that so.

Hi all - This is pulled from a past paper - Homework Statement I'm only going to state the components that I find challenging of this problem - The rest will be attached in my solution set. Essentially - given an intrinsic semiconductor comprised of group II-VI elements. Upon doping with group...

Hi, before you proceed with reading this question, I would like you to know what I do not expect anyone to solve this task for me. I have a problem with a single step in the solution and I'm only asking you to help me with this one step. 1. Homework Statement Compute ##R_B## so that Q-point of...

Hello guys, I received an admit to grad school for Mechanical Engineering, where my focus was initially Thermo-Fluids . I've also enquired about the Material Science department at the University(in the USA), and they are willing to let me transfer to the Material Science department provided I...

Homework Statement Homework Equations Voc=kt/q x ln(tpXGlXNd/(ni)2) Isc=A x q x Lp x Gl Lp=√(Dp×tp) FF=Pma/(Isc*Voc) The Attempt at a Solution I got Voc=.298 V and Isc=3.04 mA I]However, I am confused as to how to find the fill factor. I know it is the maximum voltage and current the load...

Is doping only to form an electric field in depletion region? Somehow I'm confused as far as I'm reading right now, the doping-generated carrier never discussed its role in the solar cell (other than leaving the ion and causing an electric field). Is not the number of carriers generated by...

Hey guys, Currently taking a semiconductor device fundamentals course and we are learning about R-G currents in the depletion region of a PN junction. Usually we just consider R-G centers as impurities to be avoided in the operation of a standard rectifying diode. However, I was curious as to...

I was doing an experiment to plot the IV characteristics of a diode. I connected a resistor, diode and milli ammeter in series. I connected a voltmeter across the diode. I measured the diode voltage and diode current. When i changed the resistor, I got a different set of diode voltage readings...

How can i calculate this plot (photon energy dependence of the optical gain (or loss = negative gain) of GaAs with the injected carrier density as a parameter? Show calculated plot based on this equation Given parameter: mc=0.067 me; (effective mass of electrons in conduction band) mv=0.48...

Hi, I have been using Semiconductor Parameter Analyzer Agilent 4156B for 1 year. Since a month it is malfuntioning. I am not getting the required IV for my Resistive Random Access Memory (RRAM) devices. To confirm, I checked my devices using some other lab's analyzer which proved that there is...

Hi, I'm familiar with the expression for calculating the built-in voltage of a p-n junction. How can I find the maximum built-in voltage before the semiconductor becomes degenerate (i.e., a bad metal) if I only know the material and the intrinsic carrier concentration at a given temperature...

Please help how Ve is calculated what i think is that it should be: -Ve=-Vee+IeRe; How Ve is taken positive please someone draw equivalent circuit for same

Homework Statement a) A quantum well contains electrons at a sheet carrier density of n_s =2 \times 10^{16}m^{-2}. The electron effective mass is 0.1m_e^*. Calculate the Fermi energy of the carrier distribution in the well. You may assume the spacings between sub-bands in the quantum well is...

Homework Statement we look at a silicum n++ p+ n transistor. given: NE= 1,0×1018 cm–3; NB= 2,0×1016 cm–3; NC = 2,0×1015 cm–3; here E stands for the emitter, B for the basis and C for the collectorHomework Equations a. calculate the distance in eV from the fermi-level to EFi for the emitter...

What are the commonly asked questions for the semiconductor process engineer position ? I am assuming cleanroom equipment working principles.. what else? Thanks in advance for your responses.

Forgive me for asking this question if the answer is obvious. The truth is I have a BENG in electrical engineering and want to know the differences between the two. From an engineer's perspective its about knowing what you can do with the devices in a useful way and design, analyze and build the...

Hello all! I'd like to clarify on the the differences of bipolar and unipolar voltages. I do understand that they both are used to trigger a number of semiconductor devices. Please and thank you!

I have joined a research lab on semiconductor nano devices and have been recommended to study the Robert F. Pierret book "Fundamentals of Semiconductor Devices" but unfortunately I could not understand most of the concepts after reading first three chapters. I am a computer science graduate with...

In my college, we used this transistor named SL100 and another one named CL100 for various experiments. But why are they named that way? I browsed the net for an answer for almost an hour but couldn't find a proper answer to this? What does S and L mean? what does 100 mean? From the Datasheets...

I have few queries regarding the below Qs. 1. How does the fermi level vary with distance under both equilibrium and non-equilibrium conditions? Is it constant or varying under equilibrium and non-equilibrium conditions? My query>> Fermi level vary with temp. But I am not getting how to...

Hi Guys, I'm not sure that this is the right place to ask for it, and the thread may be moved to another section, but do anyone have the solution manual of : Semiconductor Devices Physics and Design not Physics and Technology I am despratley trying to solve a homework that questions...

hi I am doing my Electronics and Communication Engineering..I need a topic for paper presentation.Im more interested in semiconductor devices and device physics..It's like,i would like to address any physical limitation in the existing technology in reducing chip size.(this is the only topic i...

Homework Statement For a forward biased P plus N abrupt junction diode, Lp = 1 micrometer, and at x = xn (x' = 0), the ratio of the hole current to the electron current, Ip/In, is 100 in the steady state. Determine Ip/In at x' = 1 micrometer. Homework Equations Jn = In/A Jp = Ip/A...

Can anyone give me some examples of some of the most cutting-edge/futuristic/"we're not there yet" applications for semiconductors? You know... the "exciting" stuff. :biggrin: I'm doing an informal presentation for my solid state class, and wanted to get some ideas of what I should research...

can anyone explain about high speed semiconductors . how do ge and gaAs can achive those speeds