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Identifier 000447039
Title Probing the effect of glass network on the synthesis and luminescence properties of composite perovskite glasses
Alternative Title Διερεύνηση της επίδρασης του πλέγματος στην σύνθεση και φωτοφωταύγεια σύνθετων περοβσκιτικών υάλων
Author Καραγιαννάκη, Άννα Κ.
Thesis advisor Στρατάκης, Εμμανουήλ
Reviewer Κουτσολέλος, Αθανάσιος
Κιοσέογλου, Γεώργιος
Abstract All-inorganic cesium lead perovskite nanocrystals are highly promising candidates for various optoelectronic and photonic applications. Although, their poor stability upon exposure to moisture as well as the lead toxicity issues limits significantly their use. A modern and promising strategy on resolving these issues is the encapsulation of highly luminescent perovskite nanocrystals within transparent inorganic oxide glasses. While the encapsulation procedure effect on the development and properties of the so-formed PV-Glasses has been explored in detail, there is luck of understanding the influence of the selected glass composition and network type on the outcome of the perovskite-glass development. In this study, we report on the synthesis and photoluminescence properties of composite perovskite-glasses upon growing all-inorganic lead halide perovskites within three different types of inorganic oxide glasses. In particular, silver metaphosphate glass is selected as the first host. It is revealed that the low glass transition temperature of the phosphate glass limits significantly the temperature range of the required post-melting annealing treatment, while the lead salt precursors react with the phosphate entities of the network and destroying the stoichiometry of the PNCs. As a result, the formation of PNCs is hindered. Following this, a double network former borophosphate glass was employed. While annealing treatments at higher temperature were facilitated in this case, the high silver content becomes an obstacle for the perovskite formation. The last composite glass studied, is a borate system with lead bromide (CsPbBr3) and cesium lead iodide (CsPbI3) perovskites. The developed composite glasses exhibit interesting photoluminescence features, while the interactions with the borate network are thoroughly investigated.
Language English
Subject Glasser
Issue date 2022-03-31
Collection   School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses
  Type of Work--Post-graduate theses
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