论文标题
基于半导体量子点的电荷转移的瞬态光谱研究
Study on Transient Spectrum Based on Charge Transfer of Semiconductor Quantum Dots
论文作者
论文摘要
随着能源危机的增加和绿色可持续性的普遍概念，量子点材料已成为化学学术和工业领域的热点。由于基于明显的量子限制效应的独特，量身定制的光伏性能，因此有必要确定与寿命刺激的激子相连的基于QD的电荷传输过程。此外，具有电子状态连续的无机纳米颗粒通过与QDS络合通过络合来有助于电子动力学与其功能之间的一致性。超快光谱可以广泛用于该系统，其中最典型的是时间分辨的瞬态吸收光谱，尤其是在飞秒或picsecond Timescale上。在本文中，我们通过稳态和瞬态吸收技术将ZNSE/CDS核壳量子点用作供体，将TiO2膜用作受体。在内部，探索了两个复合系统之间的电子传递和相关过程，并进一步研究了电子传递速率常数（KBET）与粒径和QD核心尺寸之间的关系。通过本文的研究内容，希望为具有更可控制的功能的量子点敏化设备提供材料。
With the increasing energy crisis and the prevalent concept of green sustainability, quantum dot materials have become a hot spot in the academic and industrial fields of chemistry. Due to unique, tailor-made photovoltaic properties based on marked quantum-confined effects, it's necessary to identify the QD-based charge transfer process connected with a lifetime of stimulated excitons. Additionally, inorganic nanoparticles with a continuum of electron states contribute to the consistency between electron dynamics and their function through complexation with QDs. Ultrafast spectroscopy can be widely used in this system, the most typical of which is the time-resolved transient absorption spectroscopy, especially on a femtosecond or picosecond timescale. In this paper, we used the ZnSe/CdS core-shell quantum dot as the donor, and the TiO2 film as the metal oxide molecule as the acceptor, through steady-state and transient absorption techniques. Within, the electron transfer and related processes between the two composite systems were explored, and the relationship between the electron transfer rate constant (kBET) and particle size and QD core size was further studied. Through the research content of this paper, it is hoped to provide materials for quantum dot sensitization devices with more controllable features.
