Πλοήγηση ανά Συγγραφέας "Loizos, Michail"

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  • Μικρογραφία εικόνας
    Τεκμήριο
    Extending the operational stability of inverted Perovskite solar cells with a novel, low synthetic complexity humidity-tolerant Hole Transport Layer.
    (ΕΛ.ΜΕ.ΠΑ., Σχολή Μηχανικών (ΣΜΗΧ), ΔΠΜΣ Νανοτεχνολογία για Ενεργειακές Εφαρμογές, 2024-01-26) Loizos, Michail; Λοΐζος, Μιχαήλ
    Organic conjugated polymers are a family of materials that are widely used as Hole Transport Layers Hole Transport Layer (HTL) in Perovskite solar cells Perovskite solar cells (PSCs). Specifically, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS) is a widely used conjugated polymer in inverted PSCs, that suffers from poor stability. In this thesis, the operating lifetime of inverted PSCs is extended to almost 900h by employing for the first time the hydrophobic conjugated polymer Indacenodithiophene thiadiazolequinoxaline (PIDTTDQ). The performance of the optimized PIDTTDQ device reaches a maximum Power Conversion Efficiency (PCE) of 14.70%, while the corresponding one for the reference device with PEDOT: PSS is 12.16%. The enhanced PCE is due to better band alignment as well as improved HTL/Perovskite interface confirmed by Transient measurements. Time Resolved Photoluminescence (TRPL) measurements have also revealed the suppression of non-radiative recombination compared to PEDOT: PSS, which can be attributed to the reduced number of defects. The hydrophobic nature of PIDTTDQ improved the lifetime of inverted PSCs when compared to the reference device and to Polybis(4-phenyl)(2,4,6- trimethylphenyl)amine (PTAA), the most efficient HTL in inverted devices. The low cost of this material makes it a potential candidate for large area devices.