在白色发光二极管中的多功能酸ABPO(4):聚合特征分析和理论计算
Chun Che Lin1, Zhi Ren Xiao, Guang-Yu Guo
1Department of Chemistry and Department of Physics, National Taiwan University, Taipei 106, Taiwan.
Journal of the American Chemical Society
|February 17, 2010
概括
新的正酸提供了多功能固态白色发光二极管 (LED) 应用. 研究人员探索了各种组成的结构性,发光性和热性质,以提高照明解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低.
背景情况:
- 在固态白色发光二极管 (LED) 中,正酸盐 (A(I) 酸盐 (B(II) 酸盐 (PO(4)) 极为重要.
- 了解它们的结构和发光特性是开发先进照明技术的关键.
研究的目的:
- 为了阐明A(I) B(II) PO(4) 的晶体结构和晶格参数.
- 调查阴离子替代和激活剂兴奋剂对发光性质的影响.
- 为了确定热稳定性和电子结构,以优化性能.
主要方法:
- 固态反应合成.
- 粉末X射线衍射 (XRD) 和GSAS精炼用于结构分析.
- 发光光谱学,衰变时间测量和CIE色度指数的确定.
- 用于电子结构分析的密度函数计算 (GGA+U).
主要成果:
- 详细描述各种A (I) B (II) PO (IV) 组合的晶体结构和晶格参数.
- 通过同替代 (Li/K替换A(I),Sr/Ba替换B(II)) 和用Eu(2+),Tb(3+),Sm(3+) 进行注,证明了多功能性.
- 对发光特性,衰变时间,CIE色度和热稳定性的全面分析.
- 电子结构调查 KSrPO ((4) 使用 DFT.
结论:
- 宿主家族A(I) B(II) PO(4) 作为白色LED的光体具有显著的潜力.
- 结构修改和激活器兴奋剂允许调整发光特性.
- 首次确定热稳定性为实际应用提供了关键数据.
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