All‐Inorganic Functional Phosphor–Glass Composites by Light Curing Induced 3D Printing for Next‐Generation Modular Lighting Devices

Abstract

AbstractDigital light processing 3D printing and pressureless sintering are combined to construct color‐tunable all‐inorganic functional composites by a simple and general strategy. The insertion of Y3Al5O12:Ce (YAG:Ce) into silica glass (YAG:Ce‐PiSG) is realized by pressureless sintering based on silica nanocomposites for 3D printing, which effectively controls the intense interface reaction between phosphor and substrate. The chromaticity of YAG:Ce‐PiSG‐based white light‐emitting diodes (WLEDs) shifts from blue‐white to white and yellow, and the 3D‐printed dome structure aids in the heat dissipation and pump blue light utilization. In addition, a series of red‐emitting color converters (CASN:Eu‐PiBSG) are synthesized by cofiring CaAlSiN3:Eu (CASN:Eu) with low softening‐point borosilicate glass powders, overcoming the fatal drawback of inherently low thermal performance. The chromaticity of integrated YAG:Ce‐PiSG/CASN:Eu‐PiBSG‐based WLEDs benefiting from 3D printing technology is adjusted in the color range from cold white to warm white. A warm WLED with high luminous efficiency (92.6 lm W−1) and excellent color rendering index (90.2) is successfully assembled. The 3D printed customizable phosphor–glass composites offer a great potential to develop high‐power and color‐tunable WLEDs, which are also of great significance for developing innovative glass composites with high‐temperature stability.