Li2SrSiO4:Ce3+, Pr3+ Phosphor with Blue, Red, and Near-Infrared Emissions Used for Plant Growth LED
作者： Jiayu Chen , Chongfeng Guo , Zheng Yang , Ting Li , Jin Zhao
DOI: 10.1111/JACE.13952
关键词:
摘要: 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), photoluminescence (PL) spectra are composed visible NIR two parts. The former exhibits blue red emission bands centered at around 428 from 5d–4f transition Ce3+ 611 1D2 → 3H4 Pr3+, those overlap photosynthesis action plants absorption chlorophylls carotenoids. While later presents broad band peaking near 1039 caused by 1G4 matching bacteriochlorophyll. Their intensity ratios (B: R: NIR) could be tuned altering relative Pr3+ concentration in meet requirements multifarious bacteria. efficient energy transfer takes place LSS host, which ascribed an exchange interaction according PL decay curves phosphors. Results suggest that present LSS: Ce3+, great potential applications plant growth n-UV LED.
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