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Title |
Σύνθεση και χαρακτηρισμός χημικά εμπλουτισμένο ανηγμένου οξειδίου του γραφενίου με κάλιο για βελτίωση απόδοσης φωτοβολταϊκών κελιών περοβσκίτη |
Alternative Title |
Synthesis and characterization of potassium doped reduced grapheme oxide for performance enhancement of perovskite solar cells |
Author
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Ζήνα, Ευαγγελία
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Thesis advisor
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Κουτσολέλος, Αθανάσιος
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Abstract |
The present bachelor thesis was carried out in the laboratory of Nanomaterials & Organic Electronics
of the Hellenic Mediterranean University of Crete. The present thesis was based on the synthesisis
and characterization of doped graphene-based materials for use in photovoltaic devices.
In the first part of this thesis, which covers the theoretical aspect of this work, the allotropic forms of
carbon, and in particular the structure of graphene, the ways of its synthesis and the properties are
described. Also, the method of preparing graphene oxide (GO) and reduced graphene oxide (RGO)
from graphite and the following potassium (K) doping method are analyzed. In addition, some of their
basic applications and the role of graphene derivatives in photovoltaic devices are analyzed.
In the second part of this work, the technical methods used to characterize the graphene-based
materials are analyzed. The third part consists of the experimental procedure followed, in the fourth
part, by the presentation of the results from the characterizations of the materials and photovoltaic
devices that were prepared and evaluated.
The experimental procedure consisted of the synthesis of graphene oxide (GO) from graphite powder
and the synthesis of reduced graphite oxide (RGO) by two different methods: 1) using hydrazine
(N2H4) as a reducing agent and 2) using hydroiodic acid (HI) as a stronger reducing agent. The
materials were then functionalised chemically with potassium hydroxide (KOH) to prepare graphene
derivatives doped with potassium atoms (KGO and KRGOs). The final products, after complete
characterization, were integrated in innovative perovskite photovoltaic devices (Perovskite Solar
Cells, PSCs) with the aim of increasing their photovoltaic efficiency.
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Language |
Greek |
Subject |
Grapheme |
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Grapheme oxide |
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Hummers method |
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Perovskite Solar Cells (PSCs) |
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Photovoltaic |
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Potassium doping |
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Reduce grapheme oxide |
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Ανηγμένο οξείδιο του γραφενίου |
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Γραφένιο |
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Εμπλουτισμός με κάλιο |
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Μέθοδος Hummers |
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Οξείδιο του γραφενίου |
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Φωτοβολταϊκά |
Issue date |
2021-11-24 |
Collection
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School/Department--School of Sciences and Engineering--Department of Chemistry--Graduate theses
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Type of Work--Graduate theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/4/b/8/metadata-dlib-1637826901-216420-6133.tkl
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Views |
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