Luminescence of CsPbsr(3)-like quantum dots in CsBr single crystals

Nikl, M.; Nitsch, K.; Mihóková, E.; Polak, K.; Fabeni, P.; Pazzi, G. P.; Gurioli, Massimo; Santucci, S.; Phani, R.; Scacco, A.; Somma, F.

doi:10.1016/S1386-9477(99)00016-8

Luminescence and decay kinetics of the Pb2+ aggregates in CsBr host crystals were measured in the 4-300 K temperature interval and in 10(-10)-10(-3) time scale. Their emission properties are similar to those of CsPbBr3 bulk crystal showing a subnanosecond free exciton emission in the 520-540 nm spectral region and slower trapped exciton emission in the 530-580 mo spectral region. An efficient energy exchange between the free and trapped exciton states is shown by the temperature dependencies of emission spectra. The quantum size effect is demonstrated in the high energy shift and broadening of the absorption and emission spectra and an estimate of the size of the CsPbBr3-like aggregates is provided. Independent evidence of the presence of the CsPbBr3 and Cs4PbBr6 aggregated phases in the CsBr host was obtained by X-ray structural studies

Luminescence of CsPbsr(3)-like quantum dots in CsBr single crystals / M. Nikl; K. Nitsch; E. Mihóková; K. Polak; P. Fabeni; G. P. Pazzi;M. Gurioli; S. Santucci;R. Phani; A. Scacco; F. Somma. - In: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES. - ISSN 1386-9477. - STAMPA. - 4:(1999), pp. 323-331. [10.1016/S1386-9477(99)00016-8]