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Help me solve this optoelectronics problem!
#1
Help me solve this optoelectronics problem!
[img][Image: ZgPjzGK.jpg][/img]

The problem is related to optoelectronics, LEDs, semiconductors.

Any idea how to solve this problem? I have found some equations that use those variables, but all of them contain variables that I dont know.

This is a problem of an exam that I have to deliver tomorrow, and we never studied this lol  Huh

PD: The questions asked are: 
-Flux of photons in (s^-1)
-Electrical current injected into the p region
-Emitted optical power in (mW)
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#2
RE: Help me solve this optoelectronics problem!
Can you define the nomenclature for the parameters?
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#3
RE: Help me solve this optoelectronics problem!
(September 24, 2019 at 2:30 pm)Anomalocaris Wrote: Can you define the nomenclature for the parameters?

The Ns are: acceptor and donor dopant concentrations in a semiconductor
The Ds are: electron and hole diffusion coefficients
th: transit time of holes
te: transit time of electrons

The other data is: Operating at 1 Volt, 300 K temperature, Area of 1 mm^2,and the external quantum efficiency is 0.5
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#4
RE: Help me solve this optoelectronics problem!
I can give you the Christian answer- 

Light a candle and pray about it.


....

If that helps..
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#5
RE: Help me solve this optoelectronics problem!
Someone asked to see my homework solutions for a Chemistry 101 assignment many moons ago. And then quickly copied one down before I retrieved my homework. If any one ever asked to see my homework solutions again, I told them sure, when it gets handed back to us, graded.  Dodgy 

Dude, you have to do your own work, because if you don't, that brick in the wall will be missing. Can't build an education that way.
I never thought I'd live long enough to become a grumpy old bastard. Here I am, killing it!
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#6
RE: Help me solve this optoelectronics problem!
(September 24, 2019 at 7:17 pm)Fireball Wrote: Someone asked to see my homework solutions for a Chemistry 101 assignment many moons ago. And then quickly copied one down before I retrieved my homework. If any one ever asked to see my homework solutions again, I told them sure, when it gets handed back to us, graded.  Dodgy 

Dude, you have to do your own work, because if you don't, that brick in the wall will be missing. Can't build an education that way.

Maybe you didnt read the part that says "We didnt study this in class". I dont even know where to start.

I already checked the whole book, and even though some concepts and equations are mentioned, it cant be solved with that information. I have to deliver the exam tomorrow and I dont have time to check a 100 books
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#7
RE: Help me solve this optoelectronics problem!
(September 24, 2019 at 8:19 pm)Macoleco Wrote:
(September 24, 2019 at 7:17 pm)Fireball Wrote: Someone asked to see my homework solutions for a Chemistry 101 assignment many moons ago. And then quickly copied one down before I retrieved my homework. If any one ever asked to see my homework solutions again, I told them sure, when it gets handed back to us, graded.  Dodgy 

Dude, you have to do your own work, because if you don't, that brick in the wall will be missing. Can't build an education that way.

Maybe you didnt read the part that says "We didnt study this in class". I dont even know where to start.

I already checked the whole book, and even though some concepts and equations are mentioned, it cant be solved with that information. I have to deliver the exam tomorrow and I dont have time to check a 100 books

Videos on YouTube don't help?
"Our attitudes towards things like race or gender operate on two levels. First of all, we have our conscious attitudes. This is what we choose to believe. These are our stated values, which we use to direct our behavior deliberately ... But the IAT [Implicit Association Test] measures something else. It measures our second level of attitude, our racial attitude on an unconscious level - the immediate, automatic associations that tumble out before we've even had time to think. We don't deliberately choose our unconscious attitudes. And ... we may not even be aware of them. The giant computer that is our unconscious silently crunches all the data it can from the experiences we've had, the people we've met, the lessons we've learned, the books we've read, the movies we've seen, and so on, and it forms an opinion." - Malcolm Gladwell
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#8
RE: Help me solve this optoelectronics problem!
This is heavy on semiconductor/physics rather than optics/electronics.

I was pretty good at optoelectronics ....20y ago and could have looked stuff up for you in my basement (my notes from uni), but unfortunately on the optics/electronics emphasis.

Only good advice i can give you is a german proverb regarding exams: " (have) courage to have a (knowledge) gap!"  Blush
Cetero censeo religionem delendam esse
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#9
RE: Help me solve this optoelectronics problem!
I hope you were able to find some help. Hope the exam goes well.
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#10
RE: Help me solve this optoelectronics problem!
I tried making a 3-d model of the problem.

[Image: bad-cabling.jpg]

This also a cry for help, I've been stuck here for 2 days
"For the only way to eternal glory is a life lived in service of our Lord, FSM; Verily it is FSM who is the perfect being the name higher than all names, king of all kings and will bestow upon us all, one day, The great reclaiming"  -The Prophet Boiardi-

FSM Grin
Lost Sheep I've defeated with the power of FSM:  Clickable Link  Newest member: Lek 

(October 10, 2019 at 10:28 pm)seylee Wrote: NBMNBMB
 This advice has altered my life irreversibly, Powerful
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