Organic light-emitting diodes (OLEDs) are currently one of the dominant technologies in the display industry and are promising for a variety of other applications in the fields of lighting, optical communication and healthcare. The most recent generations of OLEDs are based on the principle of thermally-activated delayed fluorescence (TADF). These materials have been successfully used in efficient devices emitting in the visible and near infrared spectral range.1,2 In addition, TADF emitters are metal-free molecules addressing the fabrication cost and environmental issues met by the previous generation of efficient OLED materials.3 Recent studies suggest that some sub-wavelength photonic nanostructures can be used to control the photophysical properties of TADF emitters and improve further their device performances.4,5
The PhD project will involve an investigation of the photophysical properties of organic TADF thin films using a broad range of analysis tools including steady-state and time-resolved optical spectroscopy. Different types of photonic nanostructures will be fabricated and their influence on the photophysical properties of TADF emitters will be examined. TADF OLEDs integrating these nanostructures will also be prepared and fully characterized to relate their electro-optical properties to the photophysics of the films. This project is challenging but represents a unique opportunity for a motivated PhD student to work at the forefront of an interdisciplinary and timely research topic, and to gain strong expertise in different areas of research, from the engineering and characterization of advanced OLED architectures to the photophysics of organic conjugated materials and the physics of photonic nanostructures.
To be eligible, applicants should hold or expect to receive a minimum 2:1 Honours degree (or the international equivalent) in physics, material science, physical chemistry or any related disciplines. The successful candidate should be highly motivated to undertake multidisciplinary research and demonstrate enthusiasm for research, the ability to think and work both independently and in team, excellent analytic and communication skills. Previous experiences in organic optoelectronics and photophysics of organic semiconductors will be considered advantageous. The student will work in a new laboratory at the School of Physics and Astronomy of the University of St Andrews, interacting with faculty members, postdoctoral researchers and other postgraduate students involved in the well-equipped Organic Semiconductor Center. A PhD scholarship of the University of St Andrews is available for Home/EU and international students. Note that non-UK applicants must imperatively meet English language entry requirement (IELTS with a minimum overall score of 6.5 or the equivalent). The scholarship will cover 3.5 years of stipend and fees, and the School with cover costs associated with any required visa. The position will remain open until a suitable candidate is found.
Informal enquiries are welcome and should be made by email to Dr Jean-Charles Ribierre ([Email Address Removed]).
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