Department of Chemistry, Washington University , Saint Louis, Missouri 63130-4899, United States.
J Am Chem Soc. 2012 Nov 14;134(45):18797-803. doi: 10.1021/ja3088218. Epub 2012 Nov 2.
Colloidal CdTe quantum wires are reported having ensemble photoluminescence efficiencies as high as 25% under low excitation-power densities. High photoluminescence efficiencies are achieved by formation of a monolayer CdS shell on the CdTe quantum wires. Like other semiconductor nanowires, the CdTe quantum wires may contain frequent wurtzite-zinc-blende structural alternations along their lengths. The present results demonstrate that the optical properties, emission-peak shape and photoluminescence efficiencies, are independent of the presence or absence of such structural alternations.
胶态 CdTe 量子线在低激发功率密度下的集合光致发光效率高达 25%。CdS 单层壳在 CdTe 量子线上的形成实现了高效率的光致发光。与其他半导体纳米线一样，CdTe 量子线在其长度上可能含有频繁的纤锌矿-闪锌矿结构交替。目前的结果表明，光学性质、发射峰形状和光致发光效率与这种结构交替的存在与否无关。
