Optical properties of Pb2+-based aggregated phases in CsBr thin film and single crystal matrices

Authors
Nikl, M Nitsch, K Mihokova, E Polak, K Fabeni, P Pazzi, GP Gurioli, M Phani, R Santucci, S Scacco, A Somma, F
Citation
M. Nikl et al., Optical properties of Pb2+-based aggregated phases in CsBr thin film and single crystal matrices, RADIAT EFF, 150(1-4), 1999, pp. 341-345
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
RADIATION EFFECTS AND DEFECTS IN SOLIDS
ISSN journal
10420150 → ACNP
Volume
150
Issue
1-4
Year of publication
1999
Pages
341 - 345
Database
ISI
SICI code
1042-0150(1999)150:1-4<341:OPOPAP>2.0.ZU;2-A
Abstract
Emission characteristics of CsPbBr3 and Cs4PbBr6 aggregates in CsBr bulk an d thin film matrices are reported. The emission of the former aggregated ph ase is peaking abo ut 520 - 560 nm. It shows small Stokes shift (50 meV) re lated to narrow free exciton emission line of sub-nanosecond decay times. Q uantum size effect was evidenced for the aggregates of 6-7 nm in diameter. The Cs4PbBr6 aggregates show emission peak at 375 nm and overall emission c haracteristics are similar to those of KBr:Pb, which is explained by very d ose local arrangement of emission centres - (PbBr6)(4-) octahedra - in both structures.