Luminescence of Pb²⁺-based aggregates in CsI matrix

V. Babin Institute of Physics, University of Tartu, Riia 142, EE 2400 Tartu, Estonia

P. Fabeni IROE-CNR, Via Panciatichi 64, 50127, Firenze, Italy

M. Nikl Institute of Physics, AS CR, Cukrovarnická 10, 16253, Prague, Czech Republic

K. Nitsch Institute of Physics, AS CR, Cukrovarnická 10, 16253, Prague, Czech Republic

G. P. Pazzi IROE-CNR, Via Panciatichi 64, 50127, Firenze, Italy

K. Polak Institute of Physics, AS CR, Cukrovarnická 10, 16253, Prague, Czech Republic

A. R. Phani Department of Physics, University of L'Aquila, Via Vetoio 1067010 L'Aquila, Italy

S. Santucci Department of Physics, University of L'Aquila, Via Vetoio 1067010 L'Aquila, Italy

S. Zazubovich Institute of Physics, University of Tartu, Riia 142, EE 2400 Tartu, Estonia

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Abstract

Emission bands at 355, 430, 465, 530, 590 and 730 nm are observed in CsI: Pb system, after annealing at 220–370°C for 20h. Their relative intensities depend strongly on annealing temperature. Absorption and excitation spectra of 465–590 nm emissions have maxima near 410 nm, i.e. in the region of exciton absorption band of bulk CsPbI₃. Thus the creation of CsPbI₃-like aggregates in CsI matrix is not excluded. The origin of the emission bands and creation mechanism of CsPbI₃ aggregates are discussed.

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Luminescence of Pb²⁺-based aggregates in CsI matrix

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Luminescence of Pb²⁺-based aggregates in CsI matrix