Tunable luminescence of Bi^(3+)/Eu^(3+)-doped SiO_(2)-Al_(2)O_(3)-MCO_(3)(M=Ca,Sr,Ba) glasses for WLED  

作　　者：Falin Zhang Xiaoying Liang Rongfei Wei Hai Guo Fangfang Hu 

机构地区：[1]Department of Physics,Zhejiang Normal University,Jinhua,321004,China

出　　处：《Journal of Rare Earths》2024年第9期1652-1657,I0001,共7页稀土学报（英文版）

基　　金：Project supported by the Natural Science Foundation of Zhejiang Province (LY21A040005);the National Natural Science Foundation of China (11804303,11974315,51802285)。

摘　　要：In this work,a group of Bi^(3+)/Eu^(3+)-doped SiO2-Al_(2)O_(3)-MCO_(3)(M=Ca,Sr,Ba) glasses were fabricated through melt-quenching method.Their structure and photoluminescence characters were studied via Xray diffraction(XRD),UV-Vis transmission spectra(TRS),excitation spectra,emission spectra and decay lifetimes.The XRD results show that no nano-crystal phase forms in glass matrix with different doping concentrations of Bi^(3+)and Eu^(3+)ions.Through regulating optical alkalinity value,the intensity of Bi^(3+)ions increases and the peak position shifts to red wavelength.The Bi^(3+)/Eu^(3+) co-doped glasses show a blue-white-yellow-red luminescence by changing concentration of Eu^(3+) ions.Energy transfer efficiency from Bi^(3+) to Eu^(3+) can reach as high as 10.54%.At 423 K, the emission intensity of 55SiO_(2)-10Al_(2)O_(3)-35BaO-0.25Bi_(2)O_(3)(GBE0.5) is 31.1% of that at 308 K.Meanwhile,the activation energy of the glass matrix is 0.251 eV.All results suggest that these Bi^(3+)/Eu^(3+) co-doped glass samples possess potential application in LED field.

关 键 词：Bi^(3+) Eu^(3+) Glass White light-emitting diode Energy transfer Rare earths 

分 类 号：TN312.8[电子电信—物理电子学] TQ171.1[化学工程—玻璃工业]