基于氮磷化物的超窄带蓝光发射体：AEP N:Eu（AE = Ca、Sr、Ba）的发光特性
Nitridophosphate-Based Ultra-Narrow-Band Blue-Emitters: Luminescence Properties of AEP N :Eu (AE=Ca, Sr, Ba).
作者信息
Wendl Sebastian, Eisenburger Lucien, Strobel Philipp, Günther Daniel, Wright Jonathan P, Schmidt Peter J, Oeckler Oliver, Schnick Wolfgang
机构信息
Department of Chemistry, University of Munich (LMU), Butenandtstr. 5-13, 81377, München, Germany.
Institute for Mineralogy, Crystallography and Material Science, Leipzig University, Scharnhorststr. 20, 04275, Leipzig, Germany.
出版信息
Chemistry. 2020 Jun 5;26(32):7292-7298. doi: 10.1002/chem.202001129. Epub 2020 May 11.
The nitridophosphates AEP N (AE=Ca, Sr, Ba) were synthesized at 4-5 GPa and 1050-1150 °C applying a 1000 t press with multianvil apparatus, following the azide route. The crystal structures of CaP N and SrP N are isotypic. The space group Cmcm was confirmed by powder X-ray diffraction. The structure of BaP N (space group Amm2) was elucidated by a combination of transmission electron microscopy and diffraction of microfocused synchrotron radiation. Phase purity was confirmed by Rietveld refinement. IR spectra are consistent with the structure models and the chemical compositions were confirmed by X-ray spectroscopy. Luminescence properties of Eu -doped samples were investigated upon excitation with UV to blue light. CaP N (λ =470 nm; fwhm=1380 cm ) and SrP N (λ =440 nm; fwhm=1350 cm ) can be classified as the first ultra-narrow-band blue-emitting Eu -doped nitridophosphates. BaP N shows a notably broader blue emission (λ =417/457 nm; fwhm=2075/3550 cm ).
采用多砧装置的1000吨压力机，通过叠氮化物路线，在4 - 5吉帕和1050 - 1150°C条件下合成了氮磷化物AEP N（AE = Ca、Sr、Ba）。CaP N和SrP N的晶体结构是同型的。通过粉末X射线衍射确定了空间群Cmcm。通过透射电子显微镜和微聚焦同步辐射衍射相结合的方法阐明了BaP N（空间群Amm2）的结构。通过Rietveld精修确认了相纯度。红外光谱与结构模型一致，通过X射线光谱法确认了化学成分。研究了Eu掺杂样品在紫外到蓝光激发下的发光特性。CaP N（λ = 470 nm；半高宽 = 1380 cm）和SrP N（λ = 440 nm；半高宽 = 1350 cm）可归类为首批超窄带蓝光发射Eu掺杂氮磷化物。BaP N显示出明显更宽的蓝光发射（λ = 417/457 nm；半高宽 = 2075/3550 cm）。
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