Combinatorial approach to the development of a single mass YVO4: Bi3+,Eu3+ Phosphor with red and green dual colors for high color rendering white light-emitting diodes

Lei Chen, Kuo Ju Chen, Chun Che Lin, Cheng I. Chu, Shu Fen Hu, Min Hung Lee, Ru Shi Liu

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Abstract

Instead of developing a novel red phosphor individually, this work proposes the production of white light by combining a near-ultraviolet/ultraviolet diode chip with blue and special yellow phosphors: the yellow phosphor includes the red and green components with high color saturation. The availability of this scheme is demonstrated by preparing a white light-emitting diode (WLED) with color rendering index (Ra) up to 90.3. The desired single-mass yellow phosphor is successfully screened out from the YVO4:Bi3+,Eu 3+ system by using a combinatorial chemistry approach. When the emission color and luminous efficiency are both considered, the best composition for producing white light is (Y1-s-tBisEu t)VO4 with 0.040 ≤ s ≤ 0.050 and 0 < t ≤ 0.015. The red component that is required for a high-Ra WLED is obtained through sensitizing luminescence of Eu3+ by Bi3+ in a YVO 4 host; meanwhile, both Bi3+ and Eu3+ emission are improved by keeping the Bi3+ and Eu3+ contents close to the critical concentration.

Original languageEnglish
Pages (from-to)587-594
Number of pages8
JournalJournal of Combinatorial Chemistry
Volume12
Issue number4
DOIs
Publication statusPublished - 2010 Jul 12

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ASJC Scopus subject areas

  • Chemistry(all)

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