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The title of the thesis: Dielectric materials for organic (light-emitting) transistors

Thesis defender: Katherine Gallegos Rosas
Opponent: Prof. Maria Antonietta Loi, University of Groningen, The Netherlands
Custos: Prof. Caterina Soldano, Aalto University School of Electrical Engineering

The quest for next-generation electronics has made organic devices a popular subject of study. Among these advancements, organic light-emitting diode (OLED) technology currently leads the market, setting the benchmark for light-emitting devices. Organic light-emitting transistors (OLETs) have emerged as a promising device alternative, integrating light emission and switching functionalities into a single device. Despite their potential, fabricating high-performance light-emitting transistors comparable to highly efficient OLEDs presents significant challenges. A critical factor in optimizing these devices is the dielectric layer, which plays an essential role in charge accumulation and transport. This research delves into various dielectric materials and examines their impact on the performance of organic light-emitting transistors. Comprehensive analysis enabled the study of how each type of dielectric influences operating voltage, charge carrier mobility and balance, charge trapping, and recombination processes. Furthermore, this study successfully demonstrated a substantial reduction in the operating voltage of the devices while achieving comparable or even superior external quantum efficiency. The findings from this work are expected to contribute to the development of advanced, high-performance electronic devices, paving the way for innovative applications in organic electronics.

Thesis available for public display 10 days prior to the defence at .