WANG Guilu 1, 2, ZHENG Xigui 1, 2, Cao Angang 1, 2, LI Xingcan 3, SHAO Chenyang 3, MA Yuelong 3
(1. School of Mechanical Engineering, Zhengzhou University of Science and Technology, Zhengzhou 450064, Henan, China; 2. Henan Digital Intelligent Equipment Engineering Research Center, Zhengzhou University of Science and Technology, Zhengzhou 450064, Henan, China; 3. School of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou 450001, Henan, China)
Abstract: Solid-state lighting devices (white LED and laser lighting) have the advantages of energy saving, environmental protection, high brightness and long service life, which have great application prospects in indoor and outdoor lighting and display fields. The requirements of high power and high quality bring severe challenges to optical conversion materials. Phosphor-in-glass (PIG) has been deeply studied in the field of solid-state lighting, due to its advantages of low sintering temperature, simple preparation process and flexible structural design. The latest research progress of PIG for solid-state lighting is reviewed, where the composition, structure and preparation method of single bulk PIG, composite bulk PIG and phosphor-in-glass films were systematically summarizes. Besides, the control strategies for the performance of PIG, such as color rendering index (CRI), correlated color temperature (CCT), luminous efficiency (LE), thermal conductivity, etc., are elaborated. The advantages and disadvantages of different types of PIG are compared and analyzed. Finally, the urgent issues of luminescence saturation, fluorescence quenching and device encapsulation of PIG are discussed and the development trend of PIG for solid-state lighting are prospected.
Key words: phosphor-in-glass; white LED/laser lighting; composite structure; light quality; glass sintering