Time-resolved photoluminescence studies of single interface wurtzite/zincblende heterostructured InP nanowires

The interface between wurtzite and zinc blende InP has been identified as type-II, where electrons gather on the side holes of interface. photoluminescence resulting from recombination across is expected to be long-lived exhibit non-exponential decay emission intensity after pulsed excitation. We verify this prediction using time-resolved spectroscopy nanowires containing a single heterostructure segment blende. find that significant type-II remains even more than 30 ns also considerably longer exponential (260 ps). Our results are consistent with characteristics two polytypes. lifetime becomes shorter if we create an electron gas at by n-type doping entire nanowire. This since there many given hole can recombine with, in contrast undoped case.