Growth and characterization of ZnO/ZnTe core/shell nanowire arrays on transparent conducting oxide glass substrates.
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.
Graduate Institute of Applied Physics, National Taiwan University, Taipei, 10617, Taiwan. yuanhuei@ntu.edu.tw.
Yuwei
Y
Lin
Wei-Jen
WJ
Chen
Jiun You
JY
Lu
Yuan Huei
YH
Chang
Chi-Te
CT
Liang
Yang Fang
YF
Chen
Jing-Yu
JY
Lu