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首页> 外文期刊>Nanotechnology >Yellow-light generation and engineering in zinc-doped cadmium sulfide nanobelts with low-threshold two-photon excitation
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Yellow-light generation and engineering in zinc-doped cadmium sulfide nanobelts with low-threshold two-photon excitation

机译：低阈值双光子激发的掺锌硫化镉纳米带的黄光产生与工程

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摘要

Through a simple doping route with zinc ion as a dopant in cadmium sulfide nanobelts, a bright yellow-colored light was obtained. The detailed chromaticity and brightness of the light can be engineered by the dopant concentration and the pumping power, which are used to control the dominant wavelength to any fine yellow color, and even cover the sodium-yellow-line of 589 nm. The nanobelts were synthesized through a chemical vapor deposition method. The peak shift of the XRD result proves that the zinc ions as a dopant exist in the nanobelts rather than in the ZnCdS alloy formation. Time-resolved photoluminescence of the nanobelt reveals the existence of the defect-related state, which induces a red band to further mix with green bandedge emission to form the yellow light. Moreover, low-threshold two-photon excitation was observed in the proper Zn-doped cadmium sulfide nanobelts. The dopant and pumping powertuned generation and engineering of the yellow light makes it possible to use this kind of material as yellow light-emitting source.
机译：通过在硫化镉纳米带中使用锌离子作为掺杂剂的简单掺杂途径，获得了明亮的黄色光。可以通过掺杂浓度和泵浦功率来设计光的详细色度和亮度，这些浓度和泵浦功率用于将主波长控制为任何精细的黄色，甚至覆盖589 nm的钠-黄线。纳米带通过化学气相沉积法合成。 XRD结果的峰移证明，作为掺杂剂的锌离子存在于纳米带中，而不是在ZnCdS合金中。时间分辨的纳米带的光致发光揭示了缺陷相关状态的存在，该状态引起红色带进一步与绿色带边缘发射混合以形成黄光。此外，在适当的Zn掺杂硫化镉纳米带中观察到了低阈值双光子激发。黄光的掺杂剂和泵浦功率调谐产生和工程技术使得将这种材料用作黄光发射源成为可能。

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