Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Structural Stability, Vibrational Properties, and Photoluminescence in CsSnI3 Perovskite upon the Addition of SnF2
Δημιουργός/Συγγραφέας:	Kontos A.G. [EL] Καλτζόγλου, Ανδρέας[EN] Kaltzoglou, Andreas Siranidi E. [EL] Παλλές, Δημήτρης[EN] Palles, Dimitris Angeli G.K. Arfanis M.K. Psycharis V. Raptis Y.S. [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I. Trikalitis P.N. Stoumpos C.C. Kanatzidis M.G. Falaras P.
Εκδότης:	American Chemical Society
Ημερομηνία:	2017
Γλώσσα:	Αγγλικά
ISSN:	0020-1669
DOI:	10.1021/acs.inorgchem.6b02318
Άλλο:	PubMed ID: 28043139
Περίληψη:	The CsSnI3 perovskite and the corresponding SnF2-containing material with nominal composition CsSnI2.95F0.05 were synthesized by solid-state reactions and structurally characterized by powder X-ray diffraction. Both materials undergo rapid phase transformation upon exposure to air from the black orthorhombic phase (B-γ-CsSnI3) to the yellow orthorhombic phase (Y-CsSnI3), followed by irreversible oxidation into Cs2SnI6 within several hours. The phase transition occurs at a significantly lower rate in the SnF2-containing material rather than in the pure perovskite. The high hole-carrier concentration of the materials prohibits the detection of Raman signals for B-γ-CsSnI3 and induces a very strong plasmonic reflectance in the far-IR. In contrast, far-IR phonon bands and a rich Raman spectrum are observed for the Y-CsSnI3 modification below 140 cm-1 with weak frequency shift gradients versus temperatures between -95 and +170 °C. Above 170 °C, the signal is lost due to B-α-CsSnI3 re-formation. The photoluminescence spectra exhibit residual blue shifts and broadening as a sign of structural transformation initiation.
Τίτλος πηγής δημοσίευσης:	Inorganic Chemistry
Τόμος/Κεφάλαιο:	56
Τεύχος:	1
Σελίδες:	84-91
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2016 American Chemical Society.
Σημειώσεις:	DESTINY/316494; European Commission, EC; European Regional Development Fund, FEDER This work is financially supported by the FP7 European Union (Marie Curie Initial Training Network DESTINY/316494), the Greek government, the European Regional Development Fund of the European Union under the National Strategic Reference Framework NSRF 2007-2013, the Regional Operational Program of Attica (Projects: Advanced Materials and Devices for Energy Harvesting and Management within KRIPIS action and Thales-Investing in knowledge society through the European Social Fund/NANOMESO- MIS 377064 within the Operational Program Education and Lifelong Learning).
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο