Abstract
A set of sulfur-doped low pressure metalorganic vapor phase epitaxy InP/InGaAsP single quantum wells have been studied by admittance spectroscopy and a variety of other techniques. Admittance spectroscopy allows the studies of carrier emission from both the sulfur shallow impurity state and a quantum well which is seen to behave like a giant trap. The electron emission rates will be reported and the sulfur shallow impurity level is found to be 10 meV, in agreement with a simple theoretical calculation.
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