本课题所涉及的量子点复合体系是由作为电子给体的量子点与附着在其表面的电子受体分子所构成的。研究该体系电子转移过程的动力学信息与相应的物理机制，进而对该过程进行有效的调控，有助于提高量子点纳米器件的光电转化效率。量子点复合体系中电子转移过程的速率直接依赖于电子给体和受体之间的距离，减小给体与受体之间的距离从而改变分子间的相互作用，能够加快电子转移速率。压力不仅能够直接减小分子间的距离，还会导致物质发生相变。本课题拟以CdSe/ZnS量子点与电子受体分子所组成的复合体系为研究对象，采用高压原位飞秒时间分辨瞬态吸收光谱技术，从超快动力学角度研究高压条件下量子点复合体系在溶剂环境中的分子间电子转移过程。探索加压过程中引起的溶剂相变、电子受体分子相变是否对该体系电子转移过程有所影响，并揭示相应的物理机制，为有效调控量子点复合体系电子转移过程提供新的思路。

The quantum dot complex involved in this study is composed of quantum dots as electron donor and electron acceptor molecule attached to the surface of the quantum dots. The mechanism investigation and effective regulation of the electron transfer dynamics in the quantum dot complex is conducive to improving the photoelectric conversion efficiency of the nano devices. The rate of electron transfer process in quantum dot complex depends on the distance between electron donor and acceptor. Reducing the distance between the donor and acceptor is able to accelerate the electron transfer rate, due to the interactions between the donor and acceptor are changed. Pressure can directly change the distance between donor and acceptor and particularly induce phase transitions. This intends to perform a dynamics investigation on electron transfer dynamics between CdSe/ZnS quantum dot and electron acceptor molecule under high pressure, using in situ high-pressure femtosecond time-resolved transient absorption spectroscopy. Specifically, we aim to explore whether the phase transitions of solvent phase and electron acceptor molecule during the pressurization will affect the electron transfer process of the quantum dot complex and reveal corresponding physical mechanism, which can provide a new idea for the effective regulation of the electron transfer process in quantum dot complex.