Qunyang Zhao , Junyang Chen , Xiaolong Jing , Tianchun Lang , Mingsheng Cai , Lingling Peng , Qinping Qiang , Wenbo Chen , Elena F. Polisadova , Bitao Liu
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引用次数: 0
摘要
潜伏指纹检测是法医学中一项前景广阔的技术。本文首次提出了在近紫外光（NUV）激发下，Eu3+激活的K1-yNayGaGeO4荧光粉中的阳离子置换策略。系统地研究了相应的晶体结构、发光特性、热稳定性和颜色纯度。这些结果表明，荧光粉的光致发光（PL）强度高、紫外吸收能力强，能明显抑制基底的背景干扰，使荧光 LFP 图像具有良好的可视性。优化后的 K0.65Na0.15GaGeO4:0.2Eu3+ 荧光粉在 300 至 500 K 范围内具有很好的热稳定性和抗色移性能。这些结果表明，K0.65Na0.15GaGeO4:0.2Eu3+ 荧光粉在高分辨率、高灵敏度 LFP 检测和 LED 应用方面具有良好的潜力。
A novel highly efficient Eu3+-doped germanate red phosphor for accurate latent fingerprint detection and WLED applications
Latent fingerprint detection is one of the promising technique in forensic science. Here, a cation replacement strategy in Eu3+-activated K1-yNayGaGeO4 phosphor under excitation by near ultraviolet (NUV) light was proposed for the first time. The corresponding crystal structure, luminescent property, thermal stability, and color purity were systematically investigated. These results indicate that the high photoluminescence (PL) intensity and prominent ultraviolet absorption of the phosphors can contribute to obvious suppression of background interference of substrate and good visualization for the fluorescent LFP images. The optimized K0.65Na0.15GaGeO4:0.2Eu3+ phosphor reveals a great thermal stability and color shift resistance from 300 to 500 K. The Commission International del'Eclairage (CIE) chromaticity coordinates of K0.65Na0.15GaGeO4:0.2Eu3+ were measured to be (0.6637,0.3409), and the color purity was calculated as 91.1 %. The obtained results suggest that the K0.65Na0.15GaGeO4:0.2Eu3+ phosphor exhibits good potential for high resolution and high sensitivity LFP detection and LED application.
期刊介绍：
The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid.
We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.
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