论文标题
通过建筑状态耦合复合物在钙钛矿量子点中有效提取热载体
Efficient Extraction of Hot Carriers in Perovskite Quantum Dot through Building State Coupled Complex
论文作者
论文摘要
利用热载体是太阳能电池超过热力学详细平衡极限的关键方法，但是多年来，通过最常用的半导体受体在吸收材料中有效提取热载体在材料和光体物理学研究中一直是一个挑战。本文中，我们构建了一系列CSPBI3量子点和富勒烯导数系统，以探索该过程的决定性因素，并首次实现了这些系统中有效的热载体提取（最大提取效率〜84％）。我们发现构建系统时，随着状态耦合的配合物，在CSPBI3量子点BandGap上方约0.22 eV中创建新的载流子传输通道，这有助于高效的HC提取。我们的研究直接可视化分子相互作用和超快热载体提取的内部连接。这里获得的知识和策略具有普遍的含义，迈出了重要的一步，真正的热门载体光伏。
Utilizing hot carriers is the crucial approach for solar cell to exceed the thermodynamic detailed balance limit, yet effective extraction of hot carriers in absorber materials via most commonly used semiconductor acceptors has been a challenge in both materials and photophysics research for many years. Herein, we build series of CsPbI3 quantum dot and fullerene derivative systems to explore the decisive factors of this process and have for the first time realized efficient hot carrier extraction in these systems (maximum extraction efficiency ~ 84%). We find building the systems as state-coupled complexes creates new carrier transport channels at about 0.22 eV above CsPbI3 quantum dot bandgap, which facilitates highly efficient HC extraction. Our research directly visualizes the inner connection of molecule interaction and ultrafast hot carrier extraction. The knowledge and strategy gained here are of universal meaning, taking an important step forward true hot carrier photovoltaics.
