Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Effects of organic moieties on the photoluminescence spectra of perovskite-type tin bromide based compounds
Δημιουργός/Συγγραφέας:	[EL] Παπαβασιλείου Γεώργιος[EN] Papavassiliou, George C. Vidali M.-S. Pagona G. [EL] Μούσδης, Γεώργιος Α.[EN] Mousdis, George A. Karousis N. Koutselas I.
Εκδότης:	Elsevier Ltd
Ημερομηνία:	2015
Γλώσσα:	Αγγλικά
ISSN:	0022-3697
DOI:	10.1016/j.jpcs.2014.11.018
Περίληψη:	The photoluminescence (PL) and optical absorption (OA) spectra of some compounds of the type (SC)SnBr3, (BC)2SnBr4, and (SC)(BC)2Sn2Br7 (where SC is CH3NH3+ or Cs+; BC is C4H9NH3+,CH3C6H4CH2NH3+,C12H25NH3+,C18H37NH3+ and 1-naphthylmethyl ammonium group), in the forms of thin deposits on several substrates, are investigated. Generally, using the 350 nm as excitation line, the obtained PL spectra of compounds of the type (BC)2SnBr4 with short alkyl chain-length in the alkyl ammonium moiety, show broad and strong bands. For example, the PL spectra of compound (C4H9NH3)2SnBr4 exhibit a weak band at ca 475 nm, attributed to free-excitons and a broad and strong band at ca 570 nm, attributed to radiative decay of self-trapped excitons in the inorganic moiety. This is a bright yellow-orange emission, which can be seen by naked eye, even at room temperature. In the case of the compounds with long alkyl chain-length in the alkyl ammonium moiety, the PL spectra are dominated by an excitonic band, which occurs close to the corresponding fundamental OA edge. The PL spectrum of (1-naphthylmethyl ammonium)2SnBr4 shows the strong red band with main maxima at ca 603 and 642 nm, arising from tetramers of naphthyl moieties. Also, the PL spectra of the compounds of the type (SC)SnBr3 and (SC)(BC)2Sn2Br7, after grinding, show strong bands at 600-620 nm.
Τίτλος πηγής δημοσίευσης:	Journal of Physics and Chemistry of Solids
Τόμος/Κεφάλαιο:	79
Σελίδες:	1-6
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	Defects Luminescence Optical properties Perovskites Semiconductors
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2014 Elsevier Ltd. All rights reserved.
Σημειώσεις:	Polynano-Kripis 447963 Financial support of this work by the General Secretariat for Research and Technology, Greece (Project Polynano-Kripis 447963 ) is gratefully acknowledged.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο