用于光子上转换的三重介质保护金属纳米集群敏感剂
Daichi Arima1, Shion Hidaka1, So Yokomori1
1Department of Chemistry, College of Science, Rikkyo University, 3-34-1, Nishiikebuku road, Toshima-ku, Tokyo 171-8501, Japan.
Journal of the American Chemical Society
|May 13, 2024
概括
研究人员开发了一种新的金铜纳米集群 (Au2Cu6(S-Adm) 6[P(DPA) 3 2),用于高效的三倍三倍灭绝光子上转换 (TTA-UC). 这种传感器实现了创纪录的20.7%的量子产量,
科学领域:
- 材料科学
- 纳米技术
- 摄影化学
背景情况:
- 在太阳能设备中利用未被吸收的光线时,三倍-三倍灭绝光子上转换 (TTA-UC) 是至关重要的.
- 带保护的金属纳米集群正在成为TTA-UC的有效三重敏感剂.
- 现有的敏感剂在量子产量和激发强度要求方面存在局限性.
研究的目的:
- 开发一个原子精确的,受体保护的金属纳米集群作为TTA-UC的三重敏感剂.
- 研究开发的纳米集群在太阳能系统中的升级效率和潜在应用.
主要方法:
- 一个原子精确的三重介质连接体 (TL) 保护金属纳米集群的合成:Au2Cu6(S-Adm) 6[P(DPA) 3 2 (AuCuDPA).
- 纳米集群的光物理性质的表征,包括三重状态的形成和寿命.
- 通过将AuCuDPA与DPA消灭器相结合来测量红色到蓝色的上升转换量子产量 (ΦUCg).
主要成果:
- AuCuDPA纳米集群有效地产生了长寿命的三重状态 (大约 150微秒) 通过金属到配体的电荷转移.
- 在640 nm的低值激发强度36 mW cm−2时,实现了20.7 ± 0.4%的上升转换量子产量.
- 在阳光照射下观察到强烈的上转辐射,显示出伪一级的TTA动力学.
结论:
- AuCuDPA纳米集群显著提升了TTA-UC敏感剂的性能,超过了现有的纳米晶体和纳米集群敏感剂.
- 实现的量子产量接近基于DPA的系统的理论极限.
- 由于其在模拟阳光下的效率和性能,该传感器在以太阳能为基础的系统中具有很高的实际应用潜力.
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