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Intrinsic imperfect and zero thermal quenching property for a novel β-NaYF4:Eu3+,Tb3+ red-light emitting phosphor for NUV LEDs by Shaokun Ling; Xiaoyan Qin; Chang chen; Kai Meng; Yifeng Yan; Junyun Ming; Sen Liao; Yingheng Huang; Lei Hou is a Materials Science article available to read on EtoBox.
What is Intrinsic imperfect and zero thermal quenching property for a novel β-NaYF4:Eu3+,Tb3+ red-light emitting phosphor for NUV LEDs about?
Despite long-term development of LEDs, problems urgent to resolve is still existing. The most outstanding problem to tackle is luminescent stability at high temperature working situation. In this study, a novel type of β-NaYF 4 based phosphor incorporated with Eu 3+ and Tb 3+ is reported. A series of β-NaYF 4 :0.065Eu 3+ ,xTb 3+ (x = 0.001, 0.002, 0.003, 0.004, 0.005) phosphors were synthesized by hydrothermal method. The sample β-NaYF 4 :0.065Eu 3+ ,0.002Tb 3+ possesses optimal luminescent property at room temperature. The mechanism of energy transfer from Tb 3+ to Eu 3+ ion is quadrupole-quadrupole interactions. The sample β-NaYF 4 :0.065Eu 3+ ,0.002Tb 3+ demonstrates zero thermal quenching (ZTQ) property at 303 K to 383 K. According to XRD and XPS characterizations, nonequivalent replacement between intrinsic ion Na + and Y 3+ were discovered, which finally leads to production of crystal defects. According to electron paramagnetic resonance (EPR) characterization and density functional theory (DFT) calculation, the type of crystal defect of β-NaYF 4 :0.065Eu 3+ ,0.002Tb 3+ is confirmed to be V Y vacancies which are the predominant defect of crystal. The depths and densities of d
Who reads Intrinsic imperfect and zero thermal quenching property for a novel β-NaYF4:Eu3+,Tb3+ red-light emitting phosphor for NUV LEDs?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- Shaokun Ling; Xiaoyan Qin; Chang chen; Kai Meng; Yifeng Yan; Junyun Ming; Sen Liao; Yingheng Huang; Lei Hou
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Materials Science (Physical Sciences)