Synthesis and luminescence properties of tetraphenylethene-based small molecules used in organic light emitting diodes

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2014

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Odabaş, Serhat

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Organic light emitting diodes (OLED) is an exciting new technology that attracted much attention to scientist for emissive technology. The basic OLED structure consists of a stack of fluorescent organic layers sandwiched between a transparent conducting anode and metallic cathode. The important problems in luminescence is that, molecules aggregate in solid state that leads formation of excimers which results in emission quenching so that most of the luminescent materials show weak emissions in their solid forms. In order to overcome these problem studies has been carried out to either suppress the quenching of organic luminophores or to produce significant enhancements in their light emission upon aggregation. Aggregation-induced emission (AIE) materials seem to be promising emitters in the fabrication of electroluminescent devices with high efficiency. In this study, various tetraphenylethylene (TPE) emitters were synthesized and characterized for using in OLED applications. The TPE has been functionalized with various heterocyclic aromatic side groups. Photophysical, electrochemical, thermal and AIE properties of the compounds were studied. In addition, the synthesized molecules were examined for their.

Subject Keywords

Light emitting diodes., Light-emitting electrochemical cells., Photoluminescence., Electroluminescent devices.

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http://etd.lib.metu.edu.tr/upload/12616793/index.pdf
https://hdl.handle.net/11511/23265

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

S. Odabaş, “Synthesis and luminescence properties of tetraphenylethene-based small molecules used in organic light emitting diodes,” Ph.D. - Doctoral Program, Middle East Technical University, 2014.