Ultrafast Action Spectroscopy of Hybrid States for Soft Optoelectronic Materials Engineering

用于软光电材料工程的杂化态超快作用光谱

• 批准号: EP/X030822/1
• 负责人: Artem Bakulin
• 金额: $ 219.34万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FX030822%2F1
• 关键词: Ultrafast; Action; Spectroscopy; Hybrid; States; Ultrafast; Action; Spectroscopy; Hybrid; States

A central challenge in the development of modern optoelectronic materials is the ability to characterise and control their electronic and structural dynamics with high time resolution and spatial selectivity. This is increasingly important for solution processable 'soft' nanomaterials where the electronic and structural dynamics are highly entangled and time dependent. This entanglement leads to the hybridisation of different electronic and vibrational levels and the emergence of new states that ultimately determine the materials' optoelectronic properties and play the key role in a range of processes from charge photogeneration and exciton fission to the localisation and multiplication of electronic states. A technology capable of characterising hybrid states operando would be indispensable for material engineering and device development.In the last 8 years, my team has exposed the role of hybridisation between electronic and vibrational states in a range of soft electronic nanomaterials. We have also developed a new set of methods for the ultrafast spectroscopy of nanodevices at working conditions. This brings us in a unique position to combine this expertise with recent developments in coherent multidimensional spectroscopies and versatile nanoprobe platforms, to develop a novel toolkit for time-resolved operando mapping of charge dynamics in optoelectronic materials, including the evolution hybrid states and their molecular origins. This will open new possibilities in engineering material properties by the targeted adjustments of the densities of electronic and vibrational states, interstate couplings and structural dynamics. These findings will bring a new mechanistic understanding of electronic processes in soft molecular materials and can have direct consequences for the practical applications, including the development of photovoltaics with high open-circuit voltage, emissive printable materials, or efficient and robust solar fuel devices.

现代光电材料开发的核心挑战是能够以高时间分辨率和空间选择性来表征和控制其电子和结构动力学。这对于可处理的“软”纳米材料的溶液越来越重要，在这些纳米材料中，电子和结构动力学高度纠缠并取决于时间。这种纠缠导致不同的电子和振动水平的杂交以及最终确定材料的光电特性的新状态的出现，并在从电荷光电生成和激子裂变到电子状态的定位和乘法的一系列过程中起关键作用。一项能够表征混合状态操作的技术对于材料工程和设备开发是必不可少的。在过去的8年中，我的团队在一系列软电子纳米材料中揭露了电子和振动状态之间杂交的作用。我们还开发了一组新的方法，用于在工作条件下的纳米台词的超快光谱法。这使我们处于一个独特的位置，可以将这种专业知识与连贯的多维光谱镜和多功能纳米探针平台的最新发展相结合，以开发一种新颖的工具包，以用于计算时间分辨的Operando Operando在光电材料中的电荷动态映射，包括进化混合状态及其分子原产品。这将通过对电子和振动状态，州际耦合和结构动力学的密度的有针对性调整来开辟工程材料特性的新可能性。这些发现将对软分子材料中的电子过程产生新的机械理解，并可能对实用应用产生直接的后果，包括开发具有高开路电压的光伏电压，可发射的可打印材料，或有效且可靠的太阳能燃料设备。