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Issue 14, 2019
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Near-infrared-laser-driven robust glass-ceramic-based upconverted solid-state-lighting

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Laser lighting, generally consisting of a blue laser and downconversion phosphors, is considered to be the next promising form of illumination to replace traditional LED lighting. However, irradiation with a high-powered blue laser will inevitably cause significant thermal attack, which places a high demand on phosphor converters as well as on device architecture. In this work, a proof-of-concept prototype of near-infrared laser-driven upconversion solid-state-lighting is proposed. Robust lanthanide doped α/β-NaYF4 embedded glass ceramics are developed as upconverted color converters and a routine 980 nm laser is used as the pumping source for its relatively low thermal effect and perfect resonance with Yb3+ sensitizers. Stable and bright upconversion white light is indeed produced by coupling a Yb/Tm/Er doped α-NaYF4 glass ceramic with a 980 nm laser, but the luminous efficiency and energy efficiency are only 0.3 lm W−1 and 0.12%, respectively, owing to low Er doping concentration. As an alternative, a stacking structure of Yb/Tm doped and Yb/Er doped glass ceramics is designed as a color converter to improve the luminous efficiency up to 1.0 lm W−1 and energy efficiency up to 0.5% under a laser power density of 275 W cm−2. It is believed that this research will provide a new idea for laser lighting and open up the application field of glass ceramics.

Graphical abstract: Near-infrared-laser-driven robust glass-ceramic-based upconverted solid-state-lighting

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Publication details

The article was received on 31 Jan 2019, accepted on 06 Mar 2019 and first published on 06 Mar 2019

Article type: Paper
DOI: 10.1039/C9TC00606K
J. Mater. Chem. C, 2019,7, 4109-4117

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    Near-infrared-laser-driven robust glass-ceramic-based upconverted solid-state-lighting

    J. Chen, Y. Peng, X. Li, W. Chen, H. Huang, L. Lin and D. Chen, J. Mater. Chem. C, 2019, 7, 4109
    DOI: 10.1039/C9TC00606K

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