Published online by Cambridge University Press: 15 February 2011
Various degradation modes and features of crystalline defects associated with the degradation observed both in GaA1As/GaAs and InGaAsP/InP double heterostructure light emitting sources (LED's and Lasers) are reviewed, noticing similarities and differencies between those two material systems. Non-existence of rapid degradation in the quaternary caused by DLD formation (dislocation motion) will be discussed in terms of atomic rearrangements arouna the dislocation core.