纳米棒
光致发光
光电流
材料科学
光电探测器
退火(玻璃)
拉曼光谱
发光
光电子学
扫描电子显微镜
透射电子显微镜
分析化学(期刊)
光学
纳米技术
化学
复合材料
色谱法
物理
作者
S.M. Hatch,Joe Briscoe,Andrei Sapelkin,W. P. Gillin,J. B. Gilchrist,Mary P. Ryan,Sandrine Heutz,Steve Dunn
摘要
ZnO nanorods synthesised using an aqueous pH 11 solution are shown to exhibit surface-sensitive morphology post-annealing in oxygen, air, and nitrogen as shown by scanning electron microscopy and transmission electron microscopy analysis. Raman analysis confirms the nanorods were nitrogen-doped and that nitrogen incorporation takes place during the synthesis procedure in the form of N-Hx. A strong green photoluminescence is observed post-annealing for all samples, the intensity of which is dependent on the atmosphere of anneal. This luminescence is linked to zinc vacancies as recent reports have indicated that these defects are energetically favoured with the annealing conditions used herein. ZnO-nanorod/CuSCN diodes are fabricated to examine the effect of material properties on photodetector device performance. The devices exhibit a photocurrent at zero bias, creating a self-powered photodetector. A photocurrent response of 30 μA (at 6 mW cm−2 irradiance) is measured, with a rise time of ∼25 ns, and sensitivity to both UV and visible light (475–525 nm).
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