Tianfeng, LiChen, YonghaiLei, WenZhou, XiaolongWang, Zhanguo2015-12-101386-9477http://hdl.handle.net/1885/56471This paper presents a comparative study on the optical properties of both type-I and type-II InAsSb/InGaAsSb nanostructures on InP substrates. A type-I band alignment is observed for InAsSb/InGaAsSb heterostructure when the Sb composition in InGaAsSb layers is 10%, while a type-II band alignment is observed for the InAsSb/InGaAsSb heterostructures when the Sb composition in InGaAsSb layers is higher than 10%. And, besides their long emission wavelength (around 2 μm), the InAsSb/In0.53Ga0.47As0.7Sb0.3 nanostructures with type-II band alignment have a much larger thermal activation energy (163 meV) compared with that of type-I band alignment (79 meV), which is helpful for suppressing the quenching of emission efficiency at high temperatures.Keywords: Band alignments; Comparative studies; Emission wavelength; Heterostructures; High temperature; InGaAsSb; InP substrates; Quenching of emission; Strain reducing layers; Thermal activation energies; Activation energy; Alignment; Gallium; Heterojunctions; In201110.1016/j.physe.2010.11.0102016-02-24