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.
Nikl, M., Nitsch, K., Mihokova, E., Polak, K., Fabeni, P., Pazzi, G.p., et al. (1999). Optical properties of Pb2+-based aggregated phases in CsBr thin film and single crystal matrices. RADIATION EFFECTS AND DEFECTS IN SOLIDS, 150(1-4), 341-345 [10.1080/10420159908226254].
Optical properties of Pb2+-based aggregated phases in CsBr thin film and single crystal matrices
SOMMA, Fabrizia
1999-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
