论文标题
AG-CDTE混合纳米结构中的超快载体动力学：非辐射和辐射放松
Ultrafast Carrier Dynamics in Ag-CdTe Hybrid Nanostructure: Non-radiative and Radiative Relaxations
论文作者
论文摘要
在本文中，我们使用瞬态传播光谱法研究了通过将Ag纳米颗粒（NP）和CDTE量子点（QD）组合形成的杂种中的非辐射和辐射弛豫过程。当在400 nm激发时，混合动力车的超快瞬态传播显示，以较短的时间尺度（几次picseconds）的热电子恢复速度更快，而在更长的时间尺度上显示恢复较慢（几十秒钟）。此外，发现在存在Ag NP的情况下，CDTE QD对瞬态传输的贡献增加了。但是，在存在Ag NP的情况下，CDTE QD中的辐射弛豫被淬灭。这项工作为各种弛豫过程提供了重大洞察力，从而导致金属 - 肺导体杂种中的电荷运输和PL淬灭机制。
In this article, we study non-radiative and radiative relaxation processes in a hybrid formed by combining Ag nanoparticle (NP) and CdTe quantum dots (QD) using transient transmission spectroscopy. The ultrafast transient transmission of hybrid, when excited at 400 nm, shows a faster recovery of hot electrons at a shorter time scale (few picoseconds) while it shows a slower recovery at a longer time scale (few tens of picoseconds). Further, it is found that the contribution of CdTe QD to the transient transmission is increased in the presence of Ag NP. However, the radiative relaxation in CdTe QDs gets quenched in the presence of Ag NP. This work provides significant insight into the various relaxation processes that leads to the charge transport and PL quenching mechanisms in metal-semiconductor hybrids.
