(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The IQE is defined as (photons emitted from active region ##s^{-1}##) / electrons injected across the junction.

Derive an expression for this quantity, then find the injected electron concentration ##n## which maximises it.

2. Relevant equations

3. The attempt at a solution

We've been taught that radiative recombination is given by ##\sim Bn^2##, SRH recombination by ##\sim An## and Auger by ##\sim Cn^3##. So then is the expression for IQE just

##\eta = \frac{Bn^2}{An + Bn^2 + Cn^2}##

It doesn't seem like much of a derivation, so I'm concerned that this is wrong or that I've missed something that needs to also be considered. Thanks for any help!

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# Homework Help: Internal quantum efficiency (IQE)

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