Wide‐range visible luminescence of ZnCdSe/BeZnTe type‐II superlattices grown on InP substrates

Abstract

AbstractThe photoluminescence (PL) characteristics of ZnCdSe/BeZnTe type‐II superlattices (SLs) with various thickness combinations of ZnCdSe and BeZnTe layers were investigated at room temperature. High PL peak intensities that were comparable to those of other direct‐bandgap materials, such as BeZnSeTe, were obtained. The PL peak wavelength was widely controlled from 508 to 739 nm by changing the layer thickness combination (ZnCdSe/BeZnTe) from 1 monolayer (ML)/5 ML to 6 ML/5 ML. The peak wavelengths were evaluated by comparison with theoretical values. Three‐primary‐color luminescence with PL peaks of 506, 530, and 617 nm was demonstrated for the SL sample with three types of monolithically stacked SLs with different layer thickness combinations (i.e., 1 ML/5 ML, 2 ML/5 ML, and 5 ML/5 ML). (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)