Journal Article

PUBDB-2026-02344

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of cadmium ion doping on luminescence of CsPbBr$_3$ single crystals

Shvets, V. ; Pushak, A.Extern* ; Antonyak, O. ; Gamernyk, R.Extern* ; Kotlov, A.DESY* ; Smortsova, Y.DESY* ; Salapak, V. ; Zelinskiy, A. ; Stakhura, V. ; Bovgyra, O. ; Demkiv, T. (Corresponding author)Extern* ; Voloshinovskii, A.Extern*EMBL*

2026
American Inst. of Physics Melville, NY

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Please use a persistent id in citations: doi:10.1063/5.0306690  doi:10.3204/PUBDB-2026-02344

Abstract: The effect of impurity doping with cadmium ions on the luminescent properties of CsPbBr$_3$ perovskite single crystals has been investigated. The luminescence spectra of pure and Cd-activated CsPbBr$_3$ crystals, obtained upon excitation with synchrotron radiation, reveal characteristic excitonic bands, which are interpreted as the emission of free and bound excitons in the vicinity of the crystal absorption edge, a broadband luminescence at 556.3 nm, and additional luminescence bands at 920 nm. The introduction of Cd is shown to result in an increase in the intensity of the excitonic luminescence, the emergence of supplementary emission bands due to the scattering of excitons on quasilocal lattice vibrations, and a shift of the near-edge luminescence bands toward the high-energy region. Cadmium doping is proposed to improve the tolerance factor of the perovskite structure, reduce the concentration of bromine vacancies, and increase the formation energy of anionic vacancies in Cd–Br pairs, thereby limiting halogen diffusion. These modifications lead to a reduction in non-radiative relaxation channels and enhance the efficiency of near-edge luminescence by a factor of 4. The luminescence band at 920 nm is attributed to the emission of radiation-induced defects. The results obtained highlight the potential of CsPbBr3–Cd single crystals for the development of fast scintillators with improved light output.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. Experimentebetreuung PETRA III (FS-PET-S)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20251133 EC (I-20251133-EC) (I-20251133-EC)
4. NEPHEWS - NEutrons and PHotons Elevating Worldwide Science (NEPHEWS) (101131414) (101131414)

Experiment(s):

1. PETRA Beamline P66 (PETRA III)

Appears in the scientific report 2026

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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