Spectroscopic studies of (C10H21NH3)2PbI4, (CH3NH3)(C10H21NH3)2Pb2I7, (CH3NH3) PbI3, and similar compounds
1993; Elsevier BV; Volume: 57; Issue: 1 Linguagem: Inglês
10.1016/0379-6779(93)90530-a
ISSN1879-3290
AutoresG. C. Papavassiliou, A.P. Patsis, D. J. Lagouvardos, Ioannis Koutselas,
Tópico(s)Luminescence Properties of Advanced Materials
ResumoCompounds (CnH2n+1NH3)2PbI4 (n=4,8,10…) are of growing interest as materials for non-linear optical devices. In this paper the room temperature optical absorption and luminescence spectra of (CnH2n+1NH3)2PbI4 (n=4,8,10), (CH3NH3)(CnH2n+1NH3)2Pb2I7, (CH3NH3)PbI3 and similar compounds (with Br and/or Cl instead of I as well as with Sn instead of Pb) are reported. It was found that the low frequency excitonic (or edge luminescence) bands cover a wide spectral region, namely from ca 330 nm to ca 835 nm. Also, changes in the spectra of these compounds after exposure to several oxidizing reagents are discussed.
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