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Αρχική    Organic solar cells fabrication and optimization through Hole Transport Layer (HTL) treatments  

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Τίτλος Organic solar cells fabrication and optimization through Hole Transport Layer (HTL) treatments
Συγγραφέας Αναγνώστου, Κατερίνα
Σύμβουλος διατριβής Κουτσολέλος, Αθανάσιος
Περίληψη The purpose of this diploma thesis is the fabrication Organic Solar Cells (OSCs) with optimized performance. More specifically, the conventional poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), which mainly acts in OSCs as the hole transport Layer (HTL) and electron blocking layer (EBL), will be treated in several ways, in order to tune its properties (optoelectronic, energy levels etc.) and therefore improve the device performance. The project consists of a two-step PEDOT:PSS treatment: a) the direct incorporation of tetrafluoroethylene-perfluoro-3,6-dioxa-4-methyl-7-octene-sulfonic acid copolymer (PFI) and b) the immersion in dimethyl sulfoxide (DMSO). In this context, the optimum fabrication process was investigated, while OSC device characteristics (Short-Circuit Current Density (JSC), Open-Circuit Voltage (VOC), Fill Factor (FF) and power convention efficiency (PCE) were determined using a solar simulator. Hole mobility (μh) of each HTL was also calculated. Τhe morphology and surface roughness (RMS) of each HTL was investigated using Atomic Force Spectroscopy (AFM). Results showed that the values of PCE, JSC, FF and μh were increased via treatment of PEDOT:PSS with PFI. This increase was further enhanced with the additional treatment with DMSO. The VOC value remained constant for all three fabricated devices, while the value of surface roughness (RMS) showed an increase for the PFI treated HTL and an even further increase for the PFI-DMSO treated HTL.
Γλώσσα Ελληνικά
Ημερομηνία έκδοσης 2017-11-23
Συλλογή   Σχολή/Τμήμα--Σχολή Θετικών και Τεχνολογικών Επιστημών--Τμήμα Χημείας--Πτυχιακές εργασίες
  Τύπος Εργασίας--Πτυχιακές εργασίες
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