Novel Red-Emitting Ba3Y(BO3)3:Bi3+, Eu3+ Phosphors for N-UV White Light-Emitting Diodes
Ba3Y(BO3)3:Eu3+, Bi3+ were successfully prepared via a solid-state reaction. The crystallinity, photoluminescence properties, energy transfer and thermal quenching properties were studied. Subjecting Ba3Y(BO3)3:Bi3+ samples to different excitation wavelengths (340–370 nm), obtained blue and green emission ascribed to Bi3+(II) and Bi3+(I) sites, respectively. The influence of these two sites were systematically investigated. Bi3+ efficiently transferred its absorbed energy to neighboring Eu3+ sites by enhancing its luminescence intensity. Moreover, Bi3+ greatly enhanced the excitation spectra of Eu3+ in the N-UV region by 2.26 times which indicates that Ba3Y(BO3)3:Eu3+, Bi3+ can be used as a phosphor for w-LEDs using N-UV LED chips.
Keywords: Energy Transfer; Light-Emitting Diodes; Phosphor
Document Type: Research Article
Affiliations: Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan City, 32023, Taiwan
Publication date: January 1, 2018
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