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By introducing 2-hydroxy-4-methoxy-benzophenone(UVA) and 1,10-phenanthroline(Phen) as the ligands, the ternary rare earth complex of Eu(UVA)3Phen is synthesized, and it is characterized by elemental analysis, mass spectra(MS) and infrared(IR) and ultraviolet(UV) spectroscopy. Results show that the Eu(III) in complex emits strong red luminescence when it is excited by UV light, and it has higher sensitized luminescent efficiency and longer lifetime. The organic-inorganic thin film of complex Eu(UVA)3Phen doped with nano-Ti O2 is prepared, and the nano-Ti O2 is used in the luminescence layer to change the luminescence property of Eu(UVA)3Phen. It is found that there is an efficient energy transfer process between ligands and metal ions. Moreover, in an indium tin oxide(ITO)/poly(N-vinylcar-bazole)(PVK)/Eu(UVA)3Phen/Al device, Eu3+ can be excited by intramolecular ligand-to-metal energy transfer process. The main peak of emission at 613 nm is attributed to 5D0→7F2 transition of the Eu3+, and this process results in the enhanced red emission. 相似文献
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边缘增强作为一种图像处理技术,对于研究物体边界信息有着重要的应用。根据热光鬼成像的关联机制,将鬼成像与螺旋相衬成像技术相结合,把相位物体与涡旋滤光器非定域地放在热光鬼成像系统的探测光路和参考光路中,建立了相位物体边缘增强识别系统。实验结果表明,采用具有分数阶轨道角动量拓扑荷的涡旋滤波器可以实现轨道角动量值在0~1范围内的相位物体的边缘渐变性增强效果。随着轨道角动量拓扑荷数的增加,相位物体的边缘增强效果会越明显。非定域螺旋相衬成像相较于传统的螺旋相衬成像方案,突破了被测物体和涡旋滤波器在同一光路,并且滤波器必须放置在频谱面的空间局域性限制,解除了对主动照明光源相干性的要求,增强了涡旋滤波相衬成像系统的泛化能力。 相似文献
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