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ISBN 9783843947152

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978-3-8439-4715-2, Reihe Organische Chemie

Piermaria Pinter
Synthesis and Photophysical Characterization of Efficient Phosphorescent Cyclometalated Organometallic Emitters for Application in OLEDs

297 Seiten, Dissertation Technische Universität Dresden (2020), Softcover, A5

Zusammenfassung / Abstract

From the beginning of our history, we have been continuously looking for more efficient methods of illumination. Today, we live in a time, characterised by an environmental and energy crisis. Both of these fundamental problems are closely related to the production of light. In 2015, the energy used for lighting amounted to more than 20% of energy consumption. Although forbidden in the EU, the most common light source is still the incandescent bulb, which is energy-inefficient. A normal incandescent bulb wastes up to 90% of its energy as heat. The combination of this inefficiency with our growing demand for energy for lighting explains how lighting is responsible for one-third of the world's entire production of greenhouse gases. A possible solution to this problem is offered by the more energy efficient OLED (organic light-emitting diode) technology. An OLED exploits the electronic excitation of molecules called emitters. Following the excitation, an emitter tends to relax to its ground state by emitting a photon with well-defined energy. We can accurately tune the electronic properties of the emitters by molecular design. In this work, we focused on the fundamental understanding of the electronic and photophysical properties of efficient emitters, mainly those based on platinum(II) NHC complexes. The principles investigated herein are general and can be used to create efficient triplet emitters that cover the entire visible spectrum.