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Enhanced UV photoresponse in nitrogen plasma ZnO nanotubes

机译:氮等离子体ZnO纳米管中增强的UV光响应

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The photoresponse behavior of one-dimensional ZnO nanowires (NWs) and nanotubes (NTs) grown on ITO-coated glass substrates via a wet-chemical route was investigated. The photoluminescence spectra exhibited a decrease in the deep-level intensity, indicating that the oxygen defects and impurities are occupied by the presence of N ions in the ZnO NT matrix after a nitrogen plasma treatment. I-V tests demonstrate an enhanced dark current (4.83 x 10(-7) A) after an extended plasma treatment of up to 900s for ZnO NTs compared to that (0.571 x 10(-7) A) of NWs. Furthermore, the ZnO NTs show the highest reliable photoresponse, 20 times that of NWs under UV irradiation (325 nm) in air at room temperature. It is believed that nitrogen plasma ZnO nanotubes can potentially be useful in the designs of 1D ZnO-based solar cells and optoelectronic devices.
机译:研究了通过湿化学途径在涂有ITO的玻璃基板上生长的一维ZnO纳米线(NWs)和纳米管(NTs)的光响应行为。光致发光光谱显示出深能级强度的降低,表明在氮等离子体处理之后,ZnO NT基质中存在的N离子占据了氧缺陷和杂质。 I-V测试表明,与NW的(0.571 x 10(-7)A)相比,ZnO NTs的最长等离子体处理时间延长至900s后,暗电流(4.83 x 10(-7)A)有所增强。此外,ZnO NTs表现出最高的可靠光响应,是室温下在空气中在紫外线辐射(325 nm)下NW的20倍。据信氮等离子体ZnO纳米管可潜在地用于基于一维ZnO的太阳能电池和光电器件的设计中。

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