Department of Physics, National Taiwan University, Taipei 106, Taiwan.
Nanoscale Res Lett. 2013 Sep 17;8(1):387. doi: 10.1186/1556-276X-8-387.
The fabrication and properties of n-ZnO nanowires/p-CuO coaxial heterojunction (CH) with a photoresist (PR) blocking layer are reported. In our study, c-plane wurtzite ZnO nanowires were grown by aqueous chemical method, and monoclinic CuO (111) was then coated on the ZnO nanowires by electrochemical deposition to form CH. To improve the device performance, a PR layer was inserted between the ZnO buffer layer and the CuO film to serve as a blocking layer to block the leakage current. Structural investigations of the CH indicate that the sample has good crystalline quality. It was found that our refined structure possesses a better rectifying ratio and smaller reverse leakage current. As there is a large on/off ratio between light on and off and the major light response is centered at around 424 nm, the experimental results suggest that the PR-inserted ZnO/CuO CH can be used as a good narrow-band blue light detector.
本文报道了具有光致抗蚀剂（PR）阻挡层的 n-ZnO 纳米线/p-CuO 同轴异质结（CH）的制备和性能。在我们的研究中，通过水相化学法生长了 c 面纤锌矿 ZnO 纳米线，然后通过电化学沉积在 ZnO 纳米线上涂覆了单斜晶系 CuO（111），以形成 CH。为了提高器件性能，在 ZnO 缓冲层和 CuO 薄膜之间插入了 PR 层作为阻挡层，以阻挡漏电流。CH 的结构研究表明，该样品具有良好的结晶质量。结果发现，我们的精细结构具有更好的整流比和更小的反向漏电流。由于光开启和关闭之间存在较大的开/关比，并且主要的光响应集中在 424nm 左右，实验结果表明，插入 PR 的 ZnO/CuO CH 可用作良好的窄带蓝光探测器。
