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A New Near‐Infrared Long Persistent Luminescence Material with Its Outstanding Persistent Luminescence Performance and Promising Multifunctional Application Prospects
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-06-15 , DOI: 10.1002/adom.202000097 Songsong Ding 1 , Haijie Guo 1 , Peng Feng 1 , Qiangfei Ye 1 , Yuhua Wang 1
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-06-15 , DOI: 10.1002/adom.202000097 Songsong Ding 1 , Haijie Guo 1 , Peng Feng 1 , Qiangfei Ye 1 , Yuhua Wang 1
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In this work, a novel near‐infrared (NIR) persistent luminescence (PersL) material Na2CaGe5SiO14 (NCGSO):Cr3+ is designed and prepared. The phase composition and crystal structure are analyzed by X‐ray diffraction (XRD) and Rietveld structural refinement. The band gap of NCGSO is calculated to be 4.245 eV by density functional theory (DFT) and confirmed by diffuse reflection spectroscopy (DRS). It is determined by the photoluminescence (PL) spectra, X‐ray absorption near‐edge spectroscopy (XANES), and time‐resolved emission spectra (TRES) that three Ge4+ sites can be superseded simultaneously when Cr3+ ions are doped. In addition, the PL, photoluminescence excitation (PLE), and PersL performance are analyzed systematically. Under the radiation of 254 nm ultraviolet (UV) lamp, the samples exhibit excellent PL and PersL performance in the range of 600–900 nm, and the optimal afterglow duration lasts for more than 10 h. According to results, a possible mechanism is proposed to explain the PersL phenomenon. In the end, a set of information encrypted digital labels is designed and biological tissue penetration experiments are performed. The results reveal the potential of NCGSO:Cr3+ for information encryption and biological imaging applications.
中文翻译：
一种新型的近红外长持续发光材料，具有出色的持续发光性能和广阔的应用前景
在这项工作中，设计并制备了一种新型的近红外（NIR）持续发光（PersL）材料Na 2 CaGe 5 SiO 14（NCGSO）：Cr 3+。通过X射线衍射（XRD）和Rietveld结构细化分析相组成和晶体结构。NCGSO的带隙通过密度泛函理论（DFT）计算为4.245 eV，并通过漫反射光谱法（DRS）确认。由光致发光（PL）光谱，X射线吸收近边缘光谱（XANES）和时间分辨发射光谱（TRES）确定，当Cr 3+可以同时取代三个Ge 4+位点离子被掺杂。另外，系统地分析了PL，光致发光激发（PLE）和PersL性能。在254 nm紫外线（UV）灯的辐射下，样品在600–900 nm范围内表现出优异的PL和PersL性能，最佳余辉持续时间超过10 h。根据结果，提出了一种可能的机制来解释PersL现象。最后，设计了一组信息加密的数字标签，并进行了生物组织渗透实验。结果揭示了NCGSO：Cr 3+在信息加密和生物成像应用中的潜力。
更新日期：2020-06-15
中文翻译：
一种新型的近红外长持续发光材料，具有出色的持续发光性能和广阔的应用前景
在这项工作中，设计并制备了一种新型的近红外（NIR）持续发光（PersL）材料Na 2 CaGe 5 SiO 14（NCGSO）：Cr 3+。通过X射线衍射（XRD）和Rietveld结构细化分析相组成和晶体结构。NCGSO的带隙通过密度泛函理论（DFT）计算为4.245 eV，并通过漫反射光谱法（DRS）确认。由光致发光（PL）光谱，X射线吸收近边缘光谱（XANES）和时间分辨发射光谱（TRES）确定，当Cr 3+可以同时取代三个Ge 4+位点离子被掺杂。另外，系统地分析了PL，光致发光激发（PLE）和PersL性能。在254 nm紫外线（UV）灯的辐射下，样品在600–900 nm范围内表现出优异的PL和PersL性能，最佳余辉持续时间超过10 h。根据结果，提出了一种可能的机制来解释PersL现象。最后，设计了一组信息加密的数字标签，并进行了生物组织渗透实验。结果揭示了NCGSO：Cr 3+在信息加密和生物成像应用中的潜力。
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