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Photoluminescence and Energy Transfer Study of Sr 3 Y 0.96 (BO 3 ) 3 : 0.02 Ce 3+ 0.02 Mn 2+ Phosphor for WLED Application
Author(s) -
Hargunani Sanjay P.,
Sonekar Rajkumar P.,
Dhoble Sanjay J.,
Omanwar Shreeniwas K.
Publication year - 2020
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.202000011
Subject(s) - photoluminescence , phosphor , analytical chemistry (journal) , materials science , muffle furnace , chromaticity , luminescence , mineralogy , nuclear chemistry , chemistry , optics , physics , optoelectronics , catalysis , biochemistry , calcination , chromatography
Sr 3 Y(BO 3 ) 3 ;Sr 3 Y 0.98 (BO 3 ) 3 : 0.02 Ce 3+ ;Sr 3 Y 0.98 (BO 3 ) 3 : 0.02 Mn 2+ Sr 3 Y 0.96 (BO 3 ): 0.02 Ce 3+ 0.02 Mn 2+ phosphors are synthesized by solution combustion method at 650 °C in muffle furnace. Synthesized phosphors are annealed at 950 °C for 3 h under weak reducing atmosphere provided by activated charcoal/carbon to achieve desire oxidation state of dopants. Photoluminescence study shows that Sr 3 Y 0.98 (BO 3 ) 3 : 0.02 Mn 2+ phosphors converts blue light (462 nm) into red (614 nm) due to 4 T 1(4G) to 6 A 1(6s) transition of Mn 2+ in host crystal. Sr 3 Y 0.98 (BO 3 ) 3 : 0.02 Ce 3+ converts UV radiation (261 nm: 2 f 5/2 → 5 d 1 of Ce 3+ ) into blue light of wavelength 486 nm which is attributed to the inter‐configuration 5 d 1 → 4 f 1 transition of Ce 3+ . In Sr 3 Y 0.96 (BO 3 ) 3 : 0.02 Ce 3+ 0.02 Mn 2+ phosphors resonant energy transfer occurs from Ce 3+ to Mn 2+ in host matrix, resulting into intense red emission (614 nm) from UV light (263 nm). Using photoluminescence intensity comparison, the study confirms the resonant‐ET from sensitizer Ce 3+ to activator Mn 2+ in the crystal. So the report it as UV‐activated red emitting phosphor for UV‐PC‐WLED.