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MICROWAVE ASSISTED SYNTHESIS OF TITANIUM DIOXIDE ELECTRODES FOR USE IN POLYMER DSSC
KTH, School of Information and Communication Technology (ICT).
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

It’s widely known that microwaves can be a useful tool when it comes to heating many different kinds of materials. It’s much less known however that compared to regular convective heating it can exhibit catalytic properties. This project focuses on the

difference between microwave heating and normal heating and its future in the field of

solar cell manufacturing. The main purpose was to determine whether efficient DSSC

could be manufactured by the use of microwaves. Focus was also put on the application

for flexible polymers. Polymer sintering requires lower temperatures compared with the

normally used substrates and they tend to have lower efficiencies. If the efficiencies can

be raised these types of cells can become a cheap viable option by means of the so called

roll-to-roll manufacturing.

A clear improvement was seen in both efficiency and deviation when sintering by

microwave heating compared to that of normal convective heating. Electrodes sintered

by microwaves tend to show about double the performance in these cases. Another

effect that was examined was the combined heating effect of TiO2 on conductive

substrates. The combined heating of FTO and TiO2 can be about 30% higher than the

additive heating. This is of course important from the perspective of manufacturing

performance.

Sintering a pure TiO2 paste by microwaves on a ITO:PEN substrate a DSSC efficiency of

5.5% was achieved which is a reasonably good result when compared with that of other

polymer cells. Especially considering that this was a basic test. The electrode was only

sintered for 2min and the paste was simple. This demonstrates that roll-to-roll printed

DSSC is not a farfetched concept. Following that further work on similar cells are

strongly encouraged.

Some work was also put into creating solvothermally grown nanosheets combined with

nanoparticles to create a hybrid cell in hopes of lowering electric resistivity and

subsequently increasing overall solar cell performance. No real conclusions can be

drawn in terms of increased performance. However there might be some indications of

decreased losses but more time is needed on experimental work. The current results

might however still prove valuable information for some readers.

 

Place, publisher, year, edition, pages
2014. , 79 p.
Series
TRITA-ICT-EX, 2014:11
National Category
Computer and Information Science
Identifiers
URN: urn:nbn:se:kth:diva-176935OAI: oai:DiVA.org:kth-176935DiVA: diva2:869133
Examiners
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-07-31Bibliographically approved

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