Innovative Architecture for Phosphor‐in‐Glass Films Enabling Superior Luminance and Color Quality Laser‐Driven White Light

Wang, Guo‐Juan; Zhu, Qiang‐Qiang; Nie, Shan‐Jun; Zhai, Yue; Fang, Shuang‐Qiang; Kang, Juan; Wang, Le

doi:10.1002/lpor.202301263

Cited by 4 publications

References 40 publications

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A Novel Sapphire@PiGF@Sapphire Color Converter with High Luminescence Saturation Threshold for Laser Lighting

Zhang,

Zhao,

et al. 2024

Adv Funct Materials

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Next‐generation high‐brightness laser lighting confronts a key challenge in preparing static color‐converting materials with remarkable luminescence saturation. Herein, a novel architecture of transmissive Y3Al5O12: Ce3+ (YAG) phosphor‐in‐glass film (PiGF) with double‐sided sapphires, i.e., a sandwich structured sapphire@PiGF@sapphire (S@PiGF@S) composite, is designed and fabricated by a thermocompression sintering technology. This kind of material can tolerate high laser power density (LPD) for the efficient double‐sided thermal channels and the high‐energy laser spot away from the PiGF emitting layer. As a consequence, the optimized S@PiGF@S color converter yields white light with a high luminous flux (LF) of 7602 lm at a record luminescence saturation threshold of 46.47 W·mm−2 benefiting from its low working temperature of merely 284 °C, which is 6.3 times that of traditional PiGF@sapphire color converter (1205 lm@10.89 W·mm−2). These findings verify that the developed S@PiGF@S color converter enables preferably optical‐thermal performances for promising applications in high‐brightness laser lighting.

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A Novel Sapphire@PiGF@Sapphire Color Converter with High Luminescence Saturation Threshold for Laser Lighting

Zhang,

Zhao,

et al. 2024

Adv Funct Materials

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A Strong Red‐Emitting Phosphor‐in‐BASK‐Glass through Spark Plasma Sintering: Insights into the Role of Interfacial Reaction on PL Efficiencies

Zhang,

Meng,

Zhou

et al. 2024

Laser & Photonics Reviews

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Red‐emitting phosphor‐in‐glass (Red‐PiG) color converters are critical for high‐power light‐emitting diode or laser‐driven lighting applications, yet they remain challenging due to the degradation and interfacial reactions of red‐emitting phosphors within glass matrixes. This study investigates the efficacy of spark plasma sintering (SPS) in inhibiting these interfacial reactions across different phosphor and glass compositions. CaAlSiN3:Eu2+ and Sr2Si5N8:Eu2+ phosphors, along with fluoride and borosilicate glasses, are selected to explore their interfacial behavior during SPS. By optimizing the interfacial morphology, a borosilicate‐based PiG with a luminous flux of 248 lm and a luminous efficiency of 173 lm W−1 is achieved, setting new benchmarks for Red‐PiG performance. In addition, laser‐driven white lighting based on the high‐performance Red‐PiG has a color rendering index of up to 90. The findings elucidate the mechanisms by which SPS can enhance interfacial stability and optical performance in Red‐PiG materials, offering strategic insights for advancing the synthesis of high‐quality PiG materials for optoelectronic applications.

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Highly efficient large-area ultrathin phosphor-glass composites fabricated by tape-casting for super-bright LED lights

Tang,

Li,

Zhou

et al. 2024

Preprint

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Driven by the demand for super-bright LED lights for cars, buses, and trucks, highly efficient and large-area ultrathin phosphor-glass composites (PGC) with exceptional thermal dissipation capabilities were fabricated by a combined technique of tape-casting + low-temperature cofiring process. Two kinds of ultrathin (100 μm thick) PGC plates uniformly incorporated with YAG:Ce and CaAlSiN3:Eu2+ phosphor particles and with a large size of 1044×45 mm were successfully prepared. At room temperature, photoluminescence quantum yields (PLQY) of 98.6% and 80% were achieved for the former and latter kinds of PGC glasses, respectively. Moreover, color tunable emissions were yielded in the ultrathin PGC by varying the weight ratio of different phosphors. Finally, light-emitting diodes (LEDs) encapsulated with different ultrathin PGC were demonstrated to exhibit outstanding luminous performance. When exposed to blue laser irradiation, the prepared PGC glasses demonstrated a heightened resistance to laser radiation. These unparalleled ultrathin PGC glasses could offer an unprecedented solution for the commercial applications in preparation of super bright car LED lights.

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Innovative Architecture for Phosphor‐in‐Glass Films Enabling Superior Luminance and Color Quality Laser‐Driven White Light

Cited by 4 publications

References 40 publications

A Novel Sapphire@PiGF@Sapphire Color Converter with High Luminescence Saturation Threshold for Laser Lighting

A Novel Sapphire@PiGF@Sapphire Color Converter with High Luminescence Saturation Threshold for Laser Lighting

A Strong Red‐Emitting Phosphor‐in‐BASK‐Glass through Spark Plasma Sintering: Insights into the Role of Interfacial Reaction on PL Efficiencies

Highly efficient large-area ultrathin phosphor-glass composites fabricated by tape-casting for super-bright LED lights

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