In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 11, No. 3 ( 2023), p. 1095-1102
Abstract:
Rare earth ion doping in metal halides has been a promising method for imparting and tailoring their optical and optoelectronic performances towards versatile optical applications. In this work, the relationships among intrinsic self-trapped excitons (STEs), sub-band gap defects and rare earth ions Tb 3+ in Cs 2 ZrCl 6 :Tb 3+ perovskite variants were established. Cs 2 ZrCl 6 exhibits dual emission, deriving from the intrinsic STEs and sub-band gap defects owing to the Zr 4+ or Cl − vacancies, respectively. Doping Tb 3+ facilitated the characteristic emission ( 5 D 4 – 7 F J =6,5,4,3 ) of Tb 3+ ions and the energy transfer from STEs to Tb 3+ ions. Moreover, the participation of defect states and thermally activated delayed fluorescence (TADF) might lead to a high concentration of STEs, which in turn causes the abnormal thermal quenching effect. These findings not only provide a more in-depth understanding of the luminescence properties of Cs 2 ZrCl 6 , but also provide a new direction towards achieving tunable emission colors based on the energy transfer from STEs to rare earth ions.
Type of Medium:
Online Resource
ISSN:
2050-7526
,
2050-7534
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2702245-6
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