Journal Article

PUBDB-2026-02211

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Enhanced exciton luminescence and fast scintillation potential in Sr$^{2+}$ -activated CsPbCl$_3$ single crystals

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

2026
RSC London

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Please use a persistent id in citations: doi:10.1039/D5TC03602J  doi:10.3204/PUBDB-2026-02211

Abstract: ingle crystals of pristine and Sr$^{2+}$-activated CsPbCl$_3$ were grown using the vertical Stockbarger technique, and their luminescence properties were investigated. Under excitation with synchrotron-radiation photons of 7.75 eV, which substantially exceeds the band gap energy, the pristine crystals exhibit a pronounced excitonic emission band with a maximum at ∼417 nm, whereas Sr$^{2+}$-activated crystals reveal the emergence of additional exciton-like bands in the near edge region, accompanied by a tendency of the edge emission to shift toward higher energies. The activated crystals also demonstrate a pronounced enhancement of luminescence intensity, reaching nearly a tenfold increase for CsPbCl$_3$:Sr (1 mol%). The additional exciton-like emission band Sr$^{2+}$-activated crystals may originate from excitons localized at defect-related sites. The average decay time constants of the excitonic emission bands in both the pristine and the activated crystals are approximately 500 ps at 10 K and 60 ps at 77 K. The temperature evolution of luminescence intensity is interpreted in terms of electron escape beyond the Onsager sphere, whose radius decreases with increasing temperature, whereas the temperature-induced changes in the decay time constants are attributed to thermally assisted exciton dissociation. The pronounced enhancement of near band edge luminescence intensity in Sr$^{2+}$-activated CsPbCl$_3$ crystals highlights their potential for application as fast scintillators.

Note: cc-by-nc

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-S (FS-PETRA-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-20230140 EC (I-20230140-EC) (I-20230140-EC)
4. NEPHEWS - NEutrons and PHotons Elevating Worldwide Science (NEPHEWS) (101131414) (101131414)
5. EURIZON - European network for developing new horizons for RIs (871072) (871072)

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 - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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