North East Ultrafast Transient Absorption Spectroscopy Facility

东北超快瞬态吸收光谱装置

• 批准号: EP/W006340/1
• 负责人: Elizabeth Gibson
• 金额: $ 114.99万
• 依托单位: Newcastle University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FW006340%2F1
• 关键词: North; East; Ultrafast; Transient; Absorption

This unique national facility for ultrafast transient absorption spectroscopy (and microscopy) aims to fulfil a strategically and critically important research infrastructure gap in the North East.Transient absorption spectroscopy is a key tool that enables scientists to probe the identity, formation and fate of short-lived, energetic species formed on excitation with light (e.g. from a laser). Once a molecule or material has absorbed light, there are a number of possible pathways it could follow, including re-emission, thermal relaxation, energy or electron transfer and a chemical reaction (including decomposition). Probing with broad-band UV-NIR light at various time delays after excitation enables difference spectra to be captured, providing information on the electronic excited states (which have distinct absorption spectra from the ground state) and their lifetime (which depends on the electronic state and fate of the excited species). These processes occur over a range of timescales, mostly ranging from femtoseconds to microseconds for energy or charge-transfer and chemical reactivity. The information is vital across chemistry, physics, biology and engineering. Transient absorption spectroscopy is a vital tool for fundamental understanding of processes such as energy harvesting in photosynthetic organisms, multi-exciton generation semiconductor quantum dots and charge-recombination in printable photovoltaics. The Helios-EOS Fire Transient Absorption Spectrometer will give us access to the entire timescale of physical phenomena that take place during chemical reactions and light-induced processes more broadly. This will foster and open new research areas, stimulating collaborations with groups working in physics, chemical/synthetic biology and engineering, and will make spectroscopy capabilities in the North East internationally competitive. With the broad temporal and spectral window, together with microscope extension and Newcastle University expertise of operando experiments, it will provide critical knowledge required to address the scientific challenges preventing commercialisation of novel optoelectronic devices (stability, conversion efficiency etc.). The national facility will reduce the need to depend on international collaborators, increasing the capacity and ambition of the research, and strengthens the North East region's capacity to provide for spectroscopists and materials scientists.The multidisciplinary science enabled by the national facility underpins all four EPSRC Prosperity Outcomes and the four Industrial Strategy Grand Challenges. It will support the development of light-responsive molecules and materials for sensors and communication devices that transmit or are powered by light for applications in AI and the Data Driven Economy. The facility will provide information on charge-separation, accumulation and recombination in solar cells and artificial photosynthetic devices for sustainable fuels and feedstocks for Clean Growth and Future Mobility (such as green power and hydrogen for transport). It will address innovation for the Ageing Society by supporting the design of new phototherapies or diagnostic tools such as bioimaging.These grand challenges align with the research pillars at Newcastle University and the surrounding institutions, and a facility situated in the North East will support regional, national and international collaboration to accelerate discoveries and innovation in these societally important areas. It will also support blue-skies research in light-matter interactions from atoms to systems that will have long-term impact in future innovation.

这一独特的国家超快瞬变吸收光谱(和显微镜)设备旨在填补东北地区具有战略意义和至关重要的研究基础设施空白。瞬变吸收光谱是一种关键工具，使科学家能够探索在光(例如激光)激发下形成的短期高能物种的身份、形成和命运。一旦分子或材料吸收了光，它就有许多可能的途径，包括重新发射、热弛豫、能量或电子转移和化学反应(包括分解)。在激发后的不同时间延迟使用宽带UV-NIR光进行探测，可以捕获不同的光谱，提供关于电子激发态(与基态具有不同的吸收光谱)及其寿命(取决于激发物种的电子态和命运)的信息。这些过程在一系列时间尺度上发生，对于能量或电荷转移和化学反应，大多从飞秒到微秒不等。这些信息在化学、物理、生物和工程学中都是至关重要的。瞬变吸收光谱是理解光合作用生物中的能量收集、多激子产生半导体量子点和可印刷光伏中的电荷复合等过程的重要工具。Helios-EOS火焰瞬变吸收光谱仪将使我们能够更广泛地了解化学反应和光诱导过程中发生的物理现象的整个时间尺度。这将促进和开辟新的研究领域，促进与从事物理、化学/合成生物学和工程工作的小组的合作，并将使东北部的光谱分析能力具有国际竞争力。凭借宽广的时间和光谱窗口，再加上显微镜的扩展和纽卡斯尔大学的歌剧实验专业知识，它将提供必要的关键知识，以应对阻碍新型光电子器件商业化的科学挑战(稳定性、转换效率等)。国家设施将减少对国际合作者的依赖，增加研究的能力和雄心，并加强东北地区培养光谱学家和材料科学家的能力。由国家设施实现的多学科科学是EPSRC所有四项繁荣成果和四项产业战略重大挑战的基础。它将支持为传感器和通信设备开发光响应分子和材料，这些传感器和通信设备传输光或由光供电，用于人工智能和数据驱动经济中的应用。该设施将提供太阳能电池和人造光合作用装置中电荷分离、积累和复合的信息，用于可持续燃料和清洁增长和未来机动性的原料(如用于运输的绿色电力和氢气)。它将通过支持新的光疗或诊断工具(如生物成像)的设计来解决老龄化社会的创新问题。这些重大挑战与纽卡斯尔大学和周围机构的研究支柱相一致，位于东北部的一个设施将支持区域、国家和国际合作，以加速这些具有社会重要性的领域的发现和创新。它还将支持从原子到系统的光-物质相互作用的蓝天研究，这些研究将对未来的创新产生长期影响。

项目成果

Pentafluorosulfanyl-functionalised BODIPY push-pull dyes for p-type dye-sensitized solar cells.

• DOI: 10.1039/d2se00977c
• 发表时间: 2023-03-14
• 期刊: Sustainable energy & fuels
• 影响因子: 5.6