高發光效率之有機強耦合/超強耦合元件開發與偏極子物理研究

This project, "Development of organic strong/ultrastrong coupling devices withhigh luminescence efficiency and research of polariton physics", focuses on thedevelopment of highly efficient electrical organic devices operated in strong andultrastrong coupling regimes, and performs a systematic study of polaritonexcited state physics. At present, the research of electrically pumped organicpolariton has been limited by stringent material requirements, and the quantumefficiency and luminance are far lower than general OLEDs. This projectproposes few schemes for developing devices with high efficiency. One is toincorporate a weakly-coupled emitter (inorganic quantum dots) in an organicstrongly-coupled cavity based on an intracavity pumping architecture. Byoptimizing the weakly-coupled emitter, emission and population at polaritonstates can be increased, and high efficiency and luminance can be achieved.This device scheme also enables to explore polariton lasers under high powerexcitation. Second is to develop organic strongly-coupled emitters with highabsorption and electroluminescence, which can be employed to realize efficientultrastrong coupling OLEDs and study polariton physics under ultrastrongcoupling regime. Third is to integrate organic strongly-coupled emitter andinorganic transistor for developing innovative vertical light-emitting transistorsoperating in ultrastrong coupling regime, which can be applied for displaytechnology demanding pure color and high resolution. With different devices andmaterial properties, this project not only aims to boost the current low efficiency oforganic strong coupling devices, but also establishes multifunctional angleresolvedspectroscopy systems to explore polariton state from excitation, energytransition, and emission, and to understand the key parameters affecting deviceperformance and also the effects of excitation energy, excitation power, andtemperature on the coupling strength and polariton emission. The research of thisproject will be greatly beneficial for developing low-threshold polariton laser andadvanced organic ultrastrong coupling device.