American Chemical Society
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Optoelectronic Properties of Solution Grown ZnO n‑p or p‑n Core–Shell Nanowire Arrays

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journal contribution
posted on 2016-02-11, 00:00 authored by Ken C. Pradel, Yong Ding, Wenzhuo Wu, Yoshio Bando, Naoki Fukata, Zhong Lin Wang
Sb doped ZnO nanowires grown using the low-temperature hydrothermal method have the longest reported p-type stability of over 18 months. Using this growth system, bulk homojunction films of core–shell ZnO nanowires were synthesized with either n or p-type cores and the oppositely doped shell. Extensive transmission electron microscopy (TEM) characterization showed that the nanowires remain single crystalline, and the previously reported signs of doping remain intact. The electronic properties of these films were measured, and ultraviolet photodetection was observed. This growth technique could serve as the basis for other optoelectronic devices based on ZnO such as light emitting diodes and photovoltaics.