Abstract

A kind of Sn2+/Mn2+ co-doped fluorphosphate (FP) glasses that served as single-component continuous tunable broadband emitting multi-chromatic phosphors are developed for the first time. Importantly, these FP glasses have high thermal conductivity (3.253.70  W/m·K) and good chemical stability in water (80°C). By combining with commercially available UV-LEDs directly, the emission colors can be tuned from blue/cold-white to warm-white/red through the energy transfer from Sn2+ to Mn2+, and the broadband spectra covering the whole visible region from 380 nm to 760 nm. Notably, the FP glass can also serve as a white light phosphor by controlling the content of SnO/MnO, which has excellent optical properties. The CIE chromaticity coordinate, color rendering index, and quantum efficiency are (0.33, 0.29), 84, and 0.952, respectively. These new phosphors, possessing good optical and chemical properties, are promising for applications in solid-state lighting devices.

© 2017 Optical Society of America

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