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Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
A Mn4+-Doped Far-Red-Emitting Phosphor toward Full-Spectrum Lighting
Chunchun Chen1,2, Zeyu Lyu1, Zheng Lu1,2
1Key Laboratory of Rare Earths and Institute of Material and Chemistry, Ganjiang Innovation Academy and Jiangxi Institute of Rare Earths, Chinese Academy of Sciences, Ganzhou 341000, P. R. China.
None:
Mn4+-doped oxide red phosphors exhibit significant potential in full-spectrum lighting and plant growth lighting. Far-red emitting CaLuAlO4:Mn4+ phosphor was obtained by a high-temperature solid-phase method. In this structure, Mn4+ occupies the position of [AlO6], and exhibits two broad excitation bands in the 250-600 nm range. Upon 365 nm near-ultraviolet excitation, this phosphor exhibits far-red emission near 707 nm. Its internal quantum efficiency and absorptivity were measured to be 55.04% and 81.48%, respectively. CaLuAlO4:Mn4+ can compensate for the far-red emission deficiency of WLEDs, attaining a low correlated color temperature (CCT = 3548 K) and a high color rendering index (Ra = 96.5). Plant growth experiments using packaged far-red LED verified its positive effects on plant growth. These results demonstrate the potential of CaLuAlO4:Mn4+ red phosphors for applications in full-spectrum lighting and plant growth lighting.
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