Graduate School of Information Science and Technology, and Research Center for Integrated Quantum Electronics (RCIQE), Hokkaido University , North 13 West 8, Sapporo 060-8628, Japan.
PRESTO, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan.
Nano Lett. 2017 Mar 8;17(3):1350-1355. doi: 10.1021/acs.nanolett.6b03727. Epub 2017 Feb 13.
We demonstrated the formation of all-wurtzite (WZ) InP/AlInP core-multishell (CMS) nanowires (NWs) by selective-area growth with the crystal structure transfer method. The CMS NWs consisting of an AlInP-based double heterostructure showed that the crystal structure of the multishell succeeded to the WZ phase from the WZ InP NW by the crystal structure transfer method. Transmission electron microscopy revealed that the core-shell interface had a few stacking faults due to lattice mismatch. In addition, lattice constants of WZ AlInP with a variation of Al content were determined by X-ray diffraction reciprocal space mappings, and the WZ AlInP shell had tensile strain along the c-axis. The WZ AlInP shells (Al content: 25-54%) showed cathode luminescence emissions at 1.6-2.1 eV, possibly related to In-rich domains due to composition fluctuation in the WZ AlInP shell.
我们通过选择性区域生长和晶体结构转移方法展示了全纤锌矿（WZ）InP/AlInP 核壳（CMS）纳米线（NWs）的形成。由 AlInP 基双异质结构组成的 CMS NW 表明，通过晶体结构转移方法，多壳层的晶体结构成功地从 WZ InP NW 转移到 WZ 相。透射电子显微镜显示，由于晶格失配，核壳界面存在少量层错。此外，通过 X 射线衍射倒易空间映射确定了具有不同 Al 含量的 WZ AlInP 的晶格常数，并且 WZ AlInP 壳层沿 c 轴具有拉伸应变。WZ AlInP 壳层（Al 含量：25-54%）在 1.6-2.1 eV 处表现出阴极发光发射，可能与 WZ AlInP 壳层中的成分波动有关，导致富 In 畴。
