The interface recombination velocities of CdTe/MgxCd1-xTe double heterostructure (DH) samples with different CdTe layer thicknesses and Mg compositions are studied using time-resolved photoluminescence measurements. A lowest interface recombination velocity of 30±10cm/s has been measured for the CdTe/Mg0.46Cd0.54Te interface, and a longest carrier lifetime of 0.83μs has been observed for the studied DHs. These values are very close to the best reported numbers for GaAs/AlGaAs DHs. The impact of carrier escape through thermionic emission over the MgCdTe barrier on the recombination process in the DHs is also studied.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)