Li2SrSiO4:Ce3+, Pr3+ Phosphor with Blue, Red, and Near-Infrared Emissions Used for Plant Growth LED

Jiayu Chen, Chongfeng Guo*, Zheng Yang, Ting Li, Jin Zhao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

73 Citations (Scopus)

Abstract

Ce3+/Pr3+ codoped Li2SrSiO4 (LSS) phosphors with blue, red, and near-infrared (NIR) tri-emission have been prepared via a high-temperature solid-state reaction method. Under the excitation of 200 to 400 nm near-ultraviolet (n-UV), the photoluminescence (PL) spectra of phosphors are composed of visible and NIR two parts. The former exhibits blue and red emission bands centered at around 428 nm from 5d-4f transition of Ce3+ and 611 nm from 1D23H4 transition of Pr3+, those overlap with photosynthesis action spectra of plants and absorption spectra of chlorophylls and carotenoids. While the later presents a broad NIR emission band peaking near 1039 nm caused by the 1G43H4 of Pr3+, matching with the absorption of bacteriochlorophyll. Their emission intensity ratios (B: R: NIR) could be tuned by altering the relative ratios of Ce3+ and Pr3+ concentration in the phosphors to meet the requirements of multifarious plants and bacteria. The efficient energy transfer from Ce3+ to Pr3+ takes place in the LSS host, which ascribed to an exchange interaction according to PL spectra and decay curves of phosphors. Results suggest that the present LSS: Ce3+, Pr3+ phosphors have great potential applications in plant growth n-UV LED.

Original languageEnglish
Pages (from-to)218-225
Number of pages8
JournalJournal of the American Ceramic Society
Volume99
Issue number1
DOIs
Publication statusPublished - 1 Jan 2016
Externally publishedYes

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