Surfaces and interfaces of luminescent polymer mixed ionic/electronic conductors

发光聚合物离子/电子混合导体的表面和界面 我们的跨学科研究计划专注于由发光共轭聚合物和固体聚合物电解质组成的聚合物混合离子/电子导体(MIEC)。在我们的有机光子学和电子学实验室(LOPI)，我们从头开始制作各种样品结构，并进行电传输、光学成像、伏安、光谱和模型研究，以更好地了解电化学掺杂及其对发光CP的电子结构和光学性质的显著影响。通过将双极电极引入聚合物MIEC，我们开创了一个跨学科研究领域--固态双极电化学，丰富了尚未探索的表面和界面科学。我们对MIEC的长期愿景是，通过对复杂材料系统的深入了解，开发出一类高性能、低成本的印刷设备。 由聚合物、有机小分子、离子过渡金属络合物或钙钛矿形成的MIEC是一种新兴材料，在发光器件、光伏太阳能电池、晶体管和储能方面具有潜在的应用前景。聚合物MIEC特别吸引人，因为它们具有聚合物的机械和加工优势，以及光学和电学上的有趣之处。在其最有用的形式中，聚合物MIEC被电化学地原位掺杂p和n，以形成发光聚合物p-n结，当离子通过冷却固定时，该结也可以产生光伏响应。通过对掺杂的MIEC进行放电，可以提取电能。 提出的研究旨在填补聚合物MIEC和基于MIEC的器件(如发光电化学电池)中仍然存在的知识空白。短期目标是深入了解(1)冷冻聚合物p-n结的掺杂浓度、电导率分布、电子结构、电致发光特性和瞬时响应；(2)发光共轭聚合物与固体聚合物电解质之间的界面现象；(3)双极电极和双极电极阵列对掺杂和结形成的显著影响。我们的长期研究目标是通过回答关于MIEC表面和界面的基本问题来设计更高效和更持久的MIEC。 为了开展拟议的研究，我们将利用我们在相关领域20多年的研究经验、最先进的设施、创新的研究方法和技术以及卓越的HQP培训。这项拟议的研究将培训本科生和研究生，掌握非常有价值的技术、沟通和领导技能，为他们在学术界或高科技行业的成功职业生涯做好准备。

Surfaces and interfaces of luminescent polymer mixed ionic/electronic conductors Our interdisciplinary research program focuses on polymer mixed ionic/electronic conductors (MIECs) composed of luminescent conjugated polymers and solid polymer electrolytes. In our Laboratory of Organic Photonics and Iontronics (LOPI), we fabricate various sample structures from scratch, and perform electrical transport, optical imaging, voltammetry, spectroscopy and modelling studies to better understand electrochemical doping and its dramatic effect on the electronic structures and optical properties of luminescent CPs. By introducing bipolar electrodes into the polymer MIEC, we pioneered an inter-disciplinary field of research, solid-state bipolar electrochemistry rich in unexplored surface and interface sciences. Our long-term vision for MIECs is a class of high performance, low-cost, printed devices enabled by a deep understanding of the complex material system. MIECs derived from polymers, organic small molecules, ionic transition metal complexes, or perovskites are emerging materials with potential applications in light-emitting devices, photovoltaic solar cells, transistors and energy storage. Polymer MIECs are particularly attractive because they have the mechanical and processing advantages of polymers as well as being optically and electrically interesting. In its most useful form, the polymer MIEC is electrochemically p- and n-doped in situ to form a light-emitting polymer p-n junction that can also produce a photovoltaic response when the ions are immobilized by cooling. By discharging a doped MIEC, electrical energy can be extracted. The proposed research aims to fill the knowledge gaps that still exist in polymer MIECs and MIEC-based devices such as the light-emitting electrochemical cells. The short-term objectives are to develop a thorough understanding of (1) the frozen polymer p-n junction in its doping concentration, conductivity profile, electronic structure, electroluminescent properties and transient response; (2) the interfacial phenomena between a luminescent conjugated polymer and a solid polymer electrolyte; and (3) the dramatic effects of bipolar electrodes and bipolar electrode arrays on doping and junction formation. Our long-term research goal works towards designing more efficient and long-lasting MIECs by answering the fundamental questions about MIEC surfaces and interfaces. To carry out the proposed research, we will leverage our 20 plus years of research experience in the relevant fields, state-of-the-art facilities, innovative research methodology and techniques, and excellence in HQP training. The proposed research will train undergraduate and graduate researchers on highly valuable technical, communication, and leadership skills that will prepare them for a successful career in academia or the high-tech industry.