Abstract |
Graphene is a material that has attracted great interest from modern researchers
since its discovery in 2004, thanks to its optical and electronic properties. It has
already established itself as an irreplaceable material in various areas of modern
technology, dethroning materials that are more expensive and dangerous, not only
for human health but for the environment as well.
One of the areas that graphene and its derivatives have already made their presence
felt are modern technology photovoltaic solar cells, especially the organic and
perovskite solar cell types. When it comes to the latter, they are considered a quite
efficient type, with a Power Conversion Efficiency (PCE) that has exceeded 22%.
It has been proven that larger grains of perovskite crystals in the active layer benefit
the movement of the negative and positive charges, thus increasing the efficiency of
the solar cells. Various derivatives of graphene have been used in effort to control the
size of the crystal grains of the perovskite active layer. In other words, a hybrid active
layer of perovskite crystal – graphene material is made, aiming for the better
performance of the solar cell.
The purpose of this diploma thesis is the oxidation of Graphene, making Graphene
Oxide (GO) and then, the doping of GO with Nitrogen atoms, resulting in N-doped
Reduced Graphene Oxide, for future use in a hybrid active layer of perovskite crystal –
graphene material.
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