Solution-processed active layer for an organic light-emitting transistor
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Sähkötekniikan korkeakoulu |
Bachelor's thesis
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Author
Date
2024-09-20
Department
Major/Subject
Bioinformaatioteknologia
Mcode
ELEC3016
Degree programme
Sähkötekniikan kandidaattiohjelma
Language
en
Pages
38
Series
Abstract
As a device platform, organic light-emitting transistors have gained recent interest as a luminescent electrical component. Their ability to function as an electrical switch and an emissive device depending on the applied electrical biases make them flexible and prime candidates in both efficient lasers and display devices. Currently OLETs are expensive to fabricate and offer worse electroluminescent properties when compared to their OLED counterparts. This thesis examines solution processing as a more efficient method of OLET fabrication as well as the current materials of interest. The current solution processing methods such as dip-coating and spin-coating are simple to control and can be used to produce high-quality films. However, these methods utilise semiconductor solution inefficiently and are not suitable for large-area manufacturing. Instead, solution printing methods have been shown to produce high-quality films in OLEDs. Further research is needed to show how these efficient fabrication methods could be used to fabricate OLETs from solution. Solution-processable materials have also been developed alongside solution processing methods. In in case of active layers based on a single material, light-emitting organic crystals have gained interest as they possess both high-charge carrier mobilities as well as brightness and can be processed separately from the other OLET layers. Solvent interference that has especially impacted the design of multilayer devices is being remedied by the growing list of available organic materials and the development of solution-processable inorganic materials.Description
Supervisor
Turunen, MarkusThesis advisor
Soldano, CaterinaKeywords
organic light-emitting transistor, semiconductors, solution-based processes
