预先组织的染色体促进三重能量迁移,消灭和升级单重能量收集
Prasenjit Mahato1, Nobuhiro Yanai1,2, Melinda Sindoro3
1Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University , 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
Journal of the American Chemical Society
|May 11, 2016
概括
研究人员开发了一种新的光子上转换 (UC) 策略,使用三重能量迁移,消灭和上转换单重能量收集 (TEM-UPCON). 这种方法通过在金属有机框架 (MOF) 上使用表面绑定的能量收集器来提高UC量子产量.
科学领域:
- 材料科学
- 摄影化学
- 纳米技术
背景情况:
- 使用三倍三倍灭绝的光子上转换 (UC) 可以通过利用子带隙光子来提高光伏和光催化效率.
- 在弱光下有效的UC需要预先组织染色体, 这是一个阻碍进步的挑战.
- 有序受体的金属有机框架 (MOF) 通过三重能量迁移 (TEM) 实现了高效的UC,但面临着TEM速度和光效率之间的权衡.
研究的目的:
- 解决三重能量迁移 (TEM) 速度和光子上升转换 (UC) 的光效率之间的权衡问题.
- 开发一种新的策略,即三重能量迁移,消灭和升级单重能量收集 (TEM-UPCON),以提高联网性能.
- 通过集成高光能量收集器来提高整体UC量子产量.
主要方法:
- 开发了一种TEM-UPCON策略,利用基于多孔受体的MOF晶体来容纳三重供体分子而无聚合.
- 通过协调键形成,通过高度光的能量收集器修改了捐赠者合的MOF纳米晶体的表面.
- 与原始MOF相比,利用了表面绑定采集器的更高的光量子产量来提高总UC量子产量.
主要成果:
- 通过实施表面束的能量采集器,实现了显著改善的总UC量子产量.
- 在超低激发强度下保持UC量子产量最大化,因为TTA事件仅限于MOF受体.
- 证明了TEM-UPCON战略在克服UC效率之前的局限性的有效性.
结论:
- TEM-UPCON策略为UC中TEM和光效率之间的权衡提供了可行的解决方案.
- 用光能量收集器对MOF的表面修改大大提高了整体UC量子产量.
- 该TEM-UPCON概念可用于各种收集器功能,用于定量上转换的能量采集.
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