Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Synthesis, characterization and optoelectronic properties of 2D hybrid RPbX4 semiconductors based on an isomer mixture of hexanediamine-based dications
Δημιουργός/Συγγραφέας:	Ioannou, Anna Vareli, Ioanna [EL] Καλτζόγλου, Ανδρέας[EN] Kaltzoglou, Andreas Koutselas, Ioannis
Εκδότης:	De Gruyter
Ημερομηνία:	2021-09-27
Γλώσσα:	Αγγλικά
ISSN:	0932-0776 1865-7117
DOI:	10.1515/znb-2021-0090
Περίληψη:	Three new hybrid two-dimensional (2D) organic–inorganic semiconductors are presented, which contain lead halides and a mixture of hexanediamine-based isomers in the stoichiometry [2,2,4(2,4,4)-trimethyl-1,6-hexanediamine]PbX4 (X = I, Br, Cl). These hexanediamine derivatives, with attached methyl groups at the carbon backbone of both isomers, determine the packing of the organic layers between the inorganic 2D sheets, while the optical absorption and photoluminescence spectra reveal excitonic peaks at T = 77 K and room temperature. The as-synthesized semiconductors were stored for three years in the dark and under low humidity and were examined again and the results were compared to those of the fresh materials. The chloride analogue, after the three year storage, displays white-like luminescence. The use of non-equivalent isomer and racemic mixtures in the organic component to form hybrid organic–inorganic semiconductors is an efficient method to alter the properties of 2D perovskites by tuning the isomers’ chemical functionalities. Finally, a comparison of the observed excitonic absorption and photoluminescence signals to that of analogous 2D compounds is discussed.
Τίτλος πηγής δημοσίευσης:	Zeitschrift für Naturforschung B
Τόμος/Κεφάλαιο:	76
Τεύχος:	9
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	Chirality Exciton Luminescence Low dimensional hybrid organic–inorganic perovskites
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://www.degruyter.com/document/doi/10.1515/znb-2021-0090/html?lang=en
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο