六方相NaYF_4:Yb^(3+),Er^(3+)晶体的制备及上转换发光性能  

Preparation and upconversion luminescence properties of hexagonal NaYF_4:Yb^(3+),Er^(3+) microparticles

作　　者：丁明烨[1] 陈天珏 陆春华[1] 倪亚茹[1] 许仲梓[1] 

机构地区：[1]南京工业大学材料科学与工程学院材料化学工程国家重点实验室,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2015年第2期11-16,22,共7页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏高校优势学科建设工程;江苏省高校自然科学研究重大项目(10KJA430016);江苏省普通高校研究生科研创新计划(CXLX11_0355)

摘　　要：采用水热法制备形貌规整、尺寸均一的β-NaYF4:Yb3+,Er3+微米片,借助X线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)等分析技术研究不同反应温度、反应时间对合成产物的物相、形貌和尺寸的影响。结果表明:随着反应温度的升高和反应时间的延长,生成的产物由α-NaYF4纳米颗粒逐渐转变为β-NaYF4微米片。当反应温度为220℃、反应时间为24 h时,得到了直径为2.9μm、厚度为1.3μm的片状β-NaYF4:Yb3+,Er3+粉体。荧光光谱分析表明,在980 nm激光激发下,β-NaYF4:20%Yb3+,2%Er3+粉体能够发射出绿光(波长521和539 nm)和红光(波长654 nm)。β-NaYF4 ∶Yb3＋,Er3＋ hexagonal microplates with remarkably uniform morphology and size were synthesized via a facile hydrothermal route.X-ray diffraction （XRD）,scanning electron microscope （SEM）,and transmission electron microscope （TEM） were used to characterize the samples.Results showed that the phase of the product was transformed from α-NaYF4 toβ-NaYF4,while the morphology changed from nanoparticles to microplates with the increase of reaction temperature and time.Plate-likeβ-NaYF4 ∶Yb3＋,Er3＋ microcrystals with 2.9 μm in diameter and 1.3 μm in length were obtained at a holding temperature of 220 ℃ for 24 h.The photoluminescence result indicated that green （521 nm and 539 nm） and red （654 nm） emissions were observed in the upconversion emission spectrum of β-NaYF4 ∶20％Yb3＋,2％Er3＋ under 980 nm laser diode excitation.

关 键 词：水热法 NAYF4 上转换发光 

分 类 号：O482[理学—固体物理]