Synthesis and photoluminescence properties of CdSe-Ag _2Se and CdSe-Ag coaxial hetero-nanotube arrays

摘要

We presented an easy-to-control non-galvanic method for synthesizing CdSe-Ag _2Seand CdSe-Ag coaxial hetero-nanotube arrays in anodic aluminum oxide (AAO) template, and investigated their optical properties. Cation exchange method was used to convert the CdSe nanotube arrays into the CdSe-Ag _2Se nanotube arrays. Compared with the CdSe nanotubes, the photoluminescence (PL) intensity of CdSe-Ag _2Se decreased and the PL lifetime prolonged, which was attributed to the redistribution of the exciton relaxation and recombination processes. In contrast, the CdSe-Ag hetero-nanotube arrays displayed a short PL lifetime, which was mainly due to the interaction and energy transfer between the CdSe and Ag. Our findings may have potential applications in design of the optoelectronic devices.