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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Y2Si4N6C:Ce3+ carbidonitride green-yellow phosphors: novel synthesis, photoluminescence properties, and applications
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Y2Si4N6C:Ce3+ carbidonitride green-yellow phosphors: novel synthesis, photoluminescence properties, and applications

机译：Y2SI4N6C：CE3 + CARBIDONITREDE绿黄色磷光体：新型合成，光致发光性能和应用

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摘要

The Y2Si4N6C:Ce3+ carbidonitride phosphor has been successfully synthesized via a novel acid-driven carbonization and carbothermal reduction nitridation method (ADC-CRN). This novel approach for Y2Si4N6C:Ce3+ promises lower heating temperature and shorter heating time than classical methods, indicative of a cost-effective and facile way to search for new silicon-based carbidonitrides. In contrast to Ce3+ activated (oxy) nitrides showing blue-green emissions, Y2Si4N6C:Ce3+ exhibits an individual green-yellowish emission band centered at 550 nm which is ascribed to the incorporation of highly covalent C4- into the host lattice. The sp(3) hybrid C4- was identified through high resolution electron energy loss spectroscopy analysis (EELS). Direct evidence for sole substitution of Ce3+ for Y3+ in Y2Si4N6C is represented for the first time using electron paramagnetic resonance (EPR) spectra. The red shift induced by the increasing Ce3+ content in Y2Si4N6C is reasonably deduced by the energy transfer model of intra-Ce3+ and inter-Ce3+ ions. A pc-w-LED packaging was fabricated via a combination of the yellow Y2Si4N6C:Ce3+ and blue La2Si4N6C:Ce3+ phosphors prepared using a 365 nm n-UV chip. The w-LED device shows a good color rendering index (R-a), CIE chromaticity coordinates and correlated color temperature (CCT) of 83.8, (0.3258, 0.3314) and 5819 K, respectively. These results suggest that Y2Si4N6C: Ce3+ has great potential for use in UV-LED-driven white emitting diodes.
机译：Y2SI4N6C：CE3 +碳氮化物磷光体已通过新型酸驱动的碳化和碳热还原氮化方法（ADC-CRN）成功地合成。这种新颖的Y2SI4N6C方法：CE3 +承诺比经典方法更低的加热温度和更短的加热时间，指示一种成本效益和容易寻找新的基于硅基碳氮化族碳氮化族碳氮化族的方式。与CE3 +活化（氧）氮化物形成为蓝绿色排放，Y2SI4N6C：Ce3 +表现出以550nm为中心的单个绿色淡黄色发射带，其归因于将高分共价C4-掺入宿主格子中。通过高分辨率电子能损光谱分析（EEL）鉴定SP（3）杂化C4-。使用电子顺磁共振（EPR）光谱首次表示Y2SI4N6C中Y3 +的CE3 +唯一取代的直接证据。随着CE3 +和CE3 +和CE3 +离子的能量转移模型，由Y2SI4N6C中增加CE3 +含量引起的红色移位是合理推导的。通过黄色Y2SI4N6C：Ce3 +和Blue La2Si4N6C的组合制造PC-W-LED封装：使用365nm N-UV芯片制备的Ce3 +磷光体。 W-LED器件显示出良好的显色指数（R-A），CIE色度坐标和83.8的相关色温（CCT），分别为83.8，（0.3258,0.3314）和5819 k。这些结果表明Y2SI4N6C：CE3 +具有尺寸紫外线LED驱动的白色发光二极管的巨大潜力。

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