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Design and synthesis of low temperature printed metal oxide electronic devices
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Printed electronics have led to new possibilities in the development of low-cost and lowtemperature
methods for materials production and processing. Inorganic oxide devices that are
totally solution-processed offer an appealing approach, overcoming some limitations of organic
electronics, such as performance and stability. Solution processes are simple and versatile
however, there are still some drawbacks that need to be addressed. Currently, synthesis of these
materials usually needs higher temperatures and longer annealing time which limits their use on
flexible substrates being crucial for flexible and wearable device applications.
In this thesis, a general overview is made to solution combustion synthesis (SCS) method to
synthetize nanostructures, thin films and their application in thin film transistors (TFTs) with a
low thermalbudget.Also,newstrategiestowardsprocessing ofsolution-basedmetaloxide TFTs
such as, oxide synthesis, post deposition treatments, low temperature high emerging
printing techniques are discussed.
Relevantstepstoboost solution-basedmetaloxideTFTs are analysed,sincetheoptimizationof
metal oxide (MO) thin films processed at low temperature until their printability in Roll-to-Roll
(R2R) compatible techniques. To go even further some tests are performed to decrease the
processing time required for the formation of MO thin films.
To finalize, special attentionisgiven tosolution-basedmetaloxide resistiveswitchingdevices in
which the resistive states are quite important to represent different logic states (e.g. binary code)
being useful for many digital applications.