In:
International Journal of Materials Research, Walter de Gruyter GmbH, Vol. 114, No. 12 ( 2023-12-27), p. 1129-1137
Abstract:
This study examines the optical properties of Ca 2 La 8− x (SiO 4 ) 6 O 2 : x Ho 3+ phosphors derived using the sol–gel method. X-ray diffraction data and Rietveld analysis confirmed that the phosphors formed in hexagonal phase with an average estimated crystalline size of 27 nm. The prominent excitation peak observed at wavelength 463 nm corresponding to excitation energy 2.68 eV was due to the 5 I 8 → 5 G 6 + 5 F 1 transition. The photoluminescence emission spectra revealed that the synthesized phosphors emitted in the green color region with the 5 S 2 + 5 F 4 → 5 I 8 transition, releasing 2.27 eV energy. The emission and excitation analyses revealed the presence of concentration quenching as the Ho 3+ concentration exceeded 0.03 mol in the Ca 2 La 8− x (SiO 4 ) 6 O 2 : x Ho 3+ series. Further, photometry analysis demonstrated a color purity exceeding 94 %, which supports the candidacy of these phosphors for solid-state lighting applications.
Type of Medium:
Online Resource
ISSN:
1862-5282
,
2195-8556
DOI:
10.1515/ijmr-2022-0314
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2023
detail.hit.zdb_id:
2232675-3
detail.hit.zdb_id:
2128058-7
detail.hit.zdb_id:
203021-4
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