摘要
We present temperature and power dependent photoluminescence measurements on CdSe nanowires synthesized via vapor-phase with and without the use of a metal catalyst. Nanowires produced without a catalyst can be optimized to yield higher quantum efficiency, and narrower and spatially uniform emission, when compared to the catalyst-assisted ones. Emission at energies lower than the band-edge is also found in both cases. By combining spatially-resolved photoluminescence and electron microscopy on the same nanowires, we show that catalyst-free nanowires exhibit a low-energy peak with sharp phonon replica, whereas for catalyst-assisted nanowires low-energy emission is linked to the presence of nanostructures with extended morphological defects.
我们 CdSe nanowires 上的现在的温度和力量依赖者光致发光大小有或没有金属催化剂的使用经由蒸汽阶段综合了。没有催化剂，生产的 Nanowires 能被优化产出更高的量效率，和更狭窄、空间地一致的排放，当时与帮助催化剂的相比。在比乐队边低的精力的排放也在两个盒子中被发现。由在一样的 nanowires 上联合空间地解决的光致发光和电子显微镜学，我们证明没有催化剂的 nanowires 与锋利的声子复制品展出一座低精力的山峰，而为帮助催化剂的 nanowires 低精力的排放与扩大词法缺点被连接到 nanostructures 的存在。
