Perovskites for Near-Infrared (NIR) Emitters and LEDs through understanding defects and charge carrier dynamics

• Applicant: Professor Dr. Vladimir Dyakonov
• Subject Area: Experimental Condensed Matter Physics ; Electronic Semiconductors, Components and Circuits, Integrated Systems, Sensor Technology, Theoretical Electrical Engineering ; Physical Chemistry of Solids and Surfaces, Material Characterisation
• Term: since 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 551362701

The scientific and technological objective of the project is to develop perovskite light-emitting diodes (PeLEDs) in the near infrared (NIR) for potential practical applications in the technologies, which require an emission wavelength of 850 nm. By understanding the fundamental photophysical properties of NIR-emitting perovskites and devices, we aim to achieve a level of efficiency and operational stability that was unattainable until now. Towards this goal, the development of NIR perovskite emitters by Pb-Sn composition engineering will be elaborated, while stability will be tackled by introducing a 2D perovskite surface passivation layer of NIR PeLEDs, to name two of the measures. All steps of material development are supported by the understanding of photophysical properties using time-resolved and steady-state spectroscopy, including microwave conductivity, photoluminescence of thin films and electroluminescence of NIR-PeLEDs. This synergetic combination of complementary and well-documented expertise will be made it possible as part of the international collaboration between the Gwangju Institute of Science and Technology (GIST) in South Korea and the University of Würzburg (UW) in Germany. In addition, we aim to build a long-term Korean-German international research network through lively academic exchange, the promotion of outstanding researchers and the sharing of the latest research trends.

• DFG Programme: Research Grants
• International Connection: South Korea
• Cooperation Partner: Professor Hobeom Kim, Ph.D.