Emission characteristics of CsPbBr3 and Cs4PbBr6 aggregates in CsBr bulk and thin film matrices are reported. The emission of the former aggregated phase is peaking abo ut 520 - 560 nm. It shows small Stokes shift (50 meV) related to narrow free exciton emission line of sub-nanosecond decay times. Quantum 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 characteristics are similar to those of KBr:Pb, which is explained by very dose local arrangement of emission centres - (PbBr6)(4-) octahedra - in both structures.
Optical properties of Pb2+-based aggregated phases in CsBr thin film and single crystal matrices / M. Nikl, K. Nitsch, E. Mihóková, K. Polak, P. Fabeni, G. P. Pazzi, M. Gurioli, R. Phani, S. Santucci, A. Scacco, F. Somma. - In: RADIATION EFFECTS AND DEFECTS IN SOLIDS. - ISSN 1042-0150. - STAMPA. - 150:(1999), pp. 341-345. [10.1080/10420159908226254]
Optical properties of Pb2+-based aggregated phases in CsBr thin film and single crystal matrices
GURIOLI, MASSIMO;
1999
Abstract
Emission characteristics of CsPbBr3 and Cs4PbBr6 aggregates in CsBr bulk and thin film matrices are reported. The emission of the former aggregated phase is peaking abo ut 520 - 560 nm. It shows small Stokes shift (50 meV) related to narrow free exciton emission line of sub-nanosecond decay times. Quantum 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 characteristics are similar to those of KBr:Pb, which is explained by very dose local arrangement of emission centres - (PbBr6)(4-) octahedra - in both structures.
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