不同制备条件下ZnO:X%Eu的光电特性研究  

Photoelectric Characterization of ZnO:X%Eu Under Different Preparation Conditions

作　　者：梁平 夏梓文 冯扬 杨伟业 彭鸿雁[1,2] 赵世华 LIANG Ping;XIA Ziwen;FENG Yang;YANG Weiye;PENG Hongyan;ZHAO Shihua(College of Physics and Electronic Engineering,Hainan Normal University,Haikou 571158,China;The Innovation Platform for Academicians of Hainan Province,Haikou 571158,China;Physics Department,Shangqiu Normal University,Shangqiu 476000,Henan,China)

机构地区：[1]海南师范大学物理与电子工程学院,海口571158 [2]海南省院士创新平台,海口571158 [3]商丘师范学院物理系,河南商丘476000

出　　处：《材料导报》2025年第10期32-37,共6页Materials Reports

基　　金：国家自然科学基金(U1704145);海南省自然科学基金(522MS062);海南省院士创新平台科研项目(YSPTZX202207)。

摘　　要：采用水热法在不同制备条件下合成了稀土铕(Eu)掺杂的氧化锌(ZnO)样品,并利用XRD、SEM、EDS、Raman、XPS、PL和I-V对样品的结构、形貌和性能进行了表征和分析。结果表明:掺杂5%铕的样品结晶度良好,不同退火温度(600、800、1000℃)下粉末晶粒形状均成松子状,铕离子与锌离子实际比值与理论值接近一致。Raman、XPS谱显示稀土Eu离子以三价态掺入ZnO晶格,并致使ZnO内部原子光学声子振动模的变化。PL谱显示样品在618 nm处荧光发射最强,最佳掺杂摩尔浓度为5%。I-V曲线显示,未掺杂的氧化锌粉末和ZnO:9%Eu粉末在-5~5 V的范围内的电阻率分别约为3.8×10^(10)Ω·cm和1.11×10^(9)Ω·cm。ZnO:1%Eu和ZnO:5%Eu粉末的电阻率则随着电压区间发生变化:在-5~0 V的范围内,电导呈现近似线性关系,电阻率分别约为1.41×10^(8)、1.21×10^(8)Ω·cm;在0~5 V范围内,电导则为零。以上实验结果反映了样品在掺杂不同浓度的铕时电导机制的变化规律,为材料在光电器件中的应用提供了参考价值。Synthesis of europium(Eu)doped zinc oxide(ZnO)samples was achieved using a hydrothermal method under various preparation conditions.The structural,morphological,and performance characteristics of the samples were characterized and analyzed using XRD,SEM,EDS,Raman,XPS,PL,and I-V techniques.The results indicate that the crystallinity of the 5%europium-doped sample is good,and the powder grains exhibit pinecone-like shapes at different annealing temperatures(600,800,1000℃).The actual ratio of europium ions to zinc ions is close to the theoretical value.Raman and XPS spectra show that trivalent europium ions are incorporated into the ZnO lattice,leading to changes in the atomic optical phonon vibration modes of ZnO.The PL spectrum reveals the strongest fluorescence emission at 618 nm,with the optimal doping molar concentration being 5%.The I-V curve demonstrates that the resistivity of undoped zinc oxide powder and ZnO:9%Eu powder in the range of-5 to 5 V is approximately 3.8×10^(10)Ω·cm and 1.11×10^(9)Ω·cm,respectively.While the resistivity of ZnO:1%Eu and ZnO:5%Eu powders varies within different voltage ranges:in the range of-5 to 0 V,the conductivity shows an approximately linear relationship,with resistivity values of about 1.41×10^(8)and 1.21×10^(8)Ω·cm,respectively;in the range of 0 to 5 V,the conductivity drops to zero.These experimental results reflect the variations in the conductivity mechanism of samples doped with different concentrations of europium,providing valuable insights for the application of materials in optoelectronic devices.

关 键 词：水热法 ZnO:Eu^(3+) 荧光发光 I-V特性 

分 类 号：O469[理学—凝聚态物理]