硫化物增强银纳米集团的近单位光发量
Shan-Shan Zhang1, Shana Havenridge2, Chengkai Zhang1
1School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100, People's Republic of China.
Journal of the American Chemical Society
|September 28, 2022
概括
研究人员开发了两个具有高光发光量子产量 (PLQY) 的银纳米集群用于光电子. 通过使用硫化物离子来抑制非辐射衰变,Ag64-S集群实现了97%的PLQY,使得高光纳米材料成为可能.
科学领域:
- 材料科学
- 纳米技术
- 摄影化学
背景情况:
- 银纳米集群对光电子设备具有前景.
- 低室温光发光量 (PLQY) 阻碍了设备的性能.
- 开发具有高PLQY的纳米集群对于高级应用至关重要.
研究的目的:
- 使用高室温PLQY构建超四面体的银纳米集群.
- 研究这些纳米集群中高PLQY的来源,特别是Ag64-S.
- 建立合成高PLQY银纳米集群的核心工程策略.
主要方法:
- 两个超四面体银纳米集群 (Ag64-S和Ag64-Se) 的合成,使用VO43-) 和E2-) 与PhCC-) 和Ph2PE2-) 连接物.
- 在室温下测量非脱气溶液中的光发光量 (PLQY).
- 暂时吸收光谱测试以确认光.
- 碰撞诱导的解离研究以阐明组装机制.
主要成果:
- 合成了两个相似的超四面体银纳米集群,Ag64-S和Ag64-Se.
- 在室温下,Ag64-S的PLQY接近97%
- 内硫化离子被确定为抑制非辐射衰变和促进PLQY的关键.
- 证实了光性质,并建立了四重封装组装机制.
结论:
- 使用特定离子 (硫化物) 的核心工程是高PLQY银纳米集群的有效策略.
- 通过内部硫化物抑制非辐射衰变对于达到接近单元的PLQY至关重要.
- 这项工作为制造高光银纳米集群的未来应用提供了基础.
相关概念视频
01:14Photoluminescence: Applications
474
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
474
03:45Formation of Complex Ions
23.9K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.9K