Lin Yuwei, Chen Wei-Jen, Lu Jiun You, Chang Yuan Huei, Liang Chi-Te, Chen Yang Fang, Lu Jing-Yu
Graduate Institute of Applied Physics, National Taiwan University, Taipei, 10617, Taiwan.
Nanoscale Res Lett. 2012 Jul 17;7(1):401. doi: 10.1186/1556-276X-7-401.
We report the growth and characterization of ZnO/ZnTe core/shell nanowire arrays on indium tin oxide. Coating of the ZnTe layer on well-aligned vertical ZnO nanowires has been demonstrated by scanning electron microscope, tunneling electron microscope, X-ray diffraction pattern, photoluminescence, and transmission studies. The ZnO/ZnTe core/shell nanowire arrays were then used as the active layer and carrier transport medium to fabricate a photovoltaic device. The enhanced photocurrent and faster response observed in ZnO/ZnTe, together with the quenching of the UV emission in the PL spectra, indicate that carrier separation in this structure plays an important role in determining their optical response. The results also indicate that core/shell structures can be made into useful photovoltaic devices.
我们报道了在氧化铟锡上生长的ZnO/ZnTe核壳纳米线阵列及其特性。通过扫描电子显微镜、隧道电子显微镜、X射线衍射图谱、光致发光和透射研究，证实了在排列良好的垂直ZnO纳米线上包覆ZnTe层。然后将ZnO/ZnTe核壳纳米线阵列用作活性层和载流子传输介质来制造光伏器件。在ZnO/ZnTe中观察到的增强光电流和更快响应，以及PL光谱中紫外发射的猝灭，表明这种结构中的载流子分离在决定其光学响应方面起着重要作用。结果还表明，核壳结构可制成有用的光伏器件。
