Near-infrared-laser-driven robust glass-ceramic-based upconverted solid-state-lighting
Near-infrared-laser-driven robust glass-ceramic-based upconverted solid-state-lighting
复制标题
近红外激光驱动的基于玻璃陶瓷的稳健上转换固态照明
DOI：
10.1039/c9tc00606k
复制
发表时间：
2019-04-14
影响因子：
6.4
通讯作者：
Chen, Daqin
中科院分区：
文献类型：
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作者：
Chen, Jiangkun;Peng, Yongzhao;Chen, Daqin
激光照明通常由蓝色激光和下转换荧光粉组成，被认为是下一个有希望取代传统LED照明的照明形式。然而，高功率蓝色激光照射将不可避免地引起严重的热攻击，这对荧光粉转换器和器件结构提出了很高的要求。在这项工作中，提出了一个近红外激光驱动的上转换固态照明的概念验证原型。采用980 nm常规激光作为泵浦源，利用其较低的热效应和与Yb3+敏化剂的良好共振，研制了鲁棒镧系掺杂/-NaYF4嵌入式玻璃陶瓷作为上转换颜色转换器。Yb/Tm/Er掺杂的-NaYF4玻璃陶瓷与980 nm激光耦合确实产生了稳定明亮的上转换白光，但由于Er掺杂浓度低，发光效率和能量效率分别只有0.3 lm W-1和0.12%。作为替代方案，设计了Yb/Tm掺杂和Yb/Er掺杂玻璃陶瓷的堆叠结构作为颜色转换器，在275 W cm（-2）的激光功率密度下，发光效率可达1.0 lm W-1，能量效率可达0.5%。相信本研究将为激光照明提供新的思路，开辟玻璃陶瓷的应用领域。
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 /-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 -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.