溶液可加工的MOF黄具有异常高的量子效率
Qihan Gong1, Zhichao Hu, Benjamin J Deibert
1Department of Chemistry and Chemical Biology, Rutgers University , 610 Taylor Road, Piscataway, New Jersey 08854, United States.
Journal of the American Chemical Society
|November 12, 2014
概括
研究人员开发了一种没有稀土的黄色,用于白色发光二极管 (WLED). 这种新材料实现了创纪录的90.7%的内部量子产量,为WLED应用提供了稳定和可调节的替代方案.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 光子材料的光子材料.
背景情况:
- 开发高效和稳定的光剂对于推动白色发光二极管 (WLED) 的发展至关重要.
- 对于无稀土 (RE) 的需求非常大,以克服与RE元素相关的成本和环境问题.
- 现有的无RE光素往往缺乏商业WLED应用所需的高效率和稳定性.
研究的目的:
- 设计和合成一种新的无稀土,蓝色可刺激的黄色.
- 为了实现高内部量子产量 (IQY) 和转换WLED的优良稳定性.
- 探索金属有机框架 (MOFs) 的潜力,将分子光体纳入WLED应用中.
主要方法:
- 合成一个新的三维金属有机框架,[Zn6(btc) 4 ((tppe) 2 ((DMA) 2),使用-1,3,5-三碳酸盐 (btc),1,1,2,2-四基4- ((pyridin-4-yl) 乙烯 (tppe) 和二甲基胺 (DMA).
- 描述MOF的晶体结构和光发光特性,包括激发和发射光谱.
- 在蓝光激发下测量内部量子产量 (IQY) 和外部量子产量 (EQY) (λex = 400 nm).
- 评估发光和水分稳定性,溶液可加工性和颜色可调性.
主要成果:
- 一种新的基于MOF结构的无RE黄色被成功合成.
- 当被蓝光激发时,它会呈现出明亮的黄色辐射.
- 实现了无RE,蓝色可激发的黄色的90.7%的最高报告的内部量子收益率 (IQY).
- 证明了高的外部量子产量 (EQY),优异的发光和水分稳定性,以及良好的解决方案可加工性.
结论:
- 基于MOF的新型黄代表了无RE发光材料的重大进步.
- 它的特殊IQY,稳定性和可加工性使其成为转换WLED的非常有前途的候选者.
- 这项工作突显了MOF结合分子光体的潜力,用于下一代照明技术.
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