Advanced Fabrication of Phosphor-in-Silica Glass for Stable and High-Power LEDs

作者：Moushira. A. Mohamed, M.A. Ali, Xiaofeng Liu, Jianrong Qiu · 发表于：Accounts of Materials Research · 年份：2025 · DOI：10.1021/accountsmr.5c00229 · 被引用次数：3 · 研究领域：Luminescence Properties of Advanced Materials、Microwave Dielectric Ceramics Synthesis、Additive Manufacturing and 3D Printing Technologies

High Resolution Image Download MS PowerPoint Slide Conspectus Phosphor-converted light-emitting diodes (pc-LEDs) have become critically important for various optoelectronic applications, particularly in solid-state lighting systems, backlight displays, night-vision, and bioimaging. Their significance stems from their ability to provide energy-efficient, tunable, and stable light emission across multiple spectral ranges. High-power pc-LEDs are typically fabricated by integrating spectral converters incorporating inorganic phosphors (IPs) onto blue LED chips. This conventional architecture enables efficient wavelength conversion through photoluminescence, where the phosphor layer absorbs a portion of the blue emission and re-emits light at longer wavelengths. The most economically viable and effective approach for synthesizing transparent and chemically durable spectral converters is to encapsulate efficient IP particles within silica glass matrices. The encapsulation by silica glass preserves the phosphors’ luminescence properties while providing superior chemical and thermal stability compared to other inorganic and organic alternatives. However, the fabrication of phosphor-in-silica glass (PiSG) requires applying high-pressure or high-vacuum sintering to densify the composite into a translucent spectral converter with limited sizes and shapes, making the high-throughput fabrication of PiSG challenging. In this Account, we first detail the fabrication of silica glass using bo...