Five-Surface Phosphor-in-Glass for Enhanced Illumination and Superior Color Uniformity in Large-View Scale LEDs

被引：0

作者：

Huang, Hong-Wei ^{[1
]}

Huang, Chien-Wei ^{[2
]}

Chen, Yi-Chian ^{[3
]}

Shih, Hsing-Kun ^{[2
]}

Cheng, Wei-Chih ^{[2
]}

Liu, Chun-Nien ^{[2
,4
]}

Chiang, Chia-Chin ^{[1
]}

机构：

[1] Natl Kaohsiung Univ Sci & Technol, Dept Mech Engn, Kaohsiung 807, Taiwan

[2] Natl Chung Hsing Univ, Dept Elect Engn, Taichung 402, Taiwan

[3] Fooyin Univ, Dept Occupat Safety & Hyg, Kaohsiung 831, Taiwan

[4] Natl Chun Hsing Univ, Grad Inst Optoelect Engn, Taichung 402, Taiwan

来源：

MICROMACHINES | 2024年 / 15卷 / 08期

关键词：

five-surface phosphor layer; phosphor-in-glass; laser engraving process; chip scale package; white light-emitting diode; LIGHT EXTRACTION; REMOTE PHOSPHOR; EMITTING DIODE; CCT UNIFORMITY; LUMINOUS FLUX; WHITE;

D O I：

10.3390/mi15080946

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel five-surface phosphor-in-glass (FS-PiG) structure for high illumination and excellent color uniformity in large-view scale LEDs for sensor light source application is demonstrated. YAG phosphor (Y3Al5O12:Ce3+) was uniformly mixed with ceramic and sintered at 680 degrees C to form a phosphor wafer. Sophisticated laser engraving was employed on the phosphor wafer to form saddle-shaped large-view scale FS-PiG LEDs. The performance of the FS-PiG LEDs exhibited an illumination of 401 lm, average color temperature (CCT) of 5488 K +/- 110 K, and color coordinates (CIE) of (0.3179 +/- 0.003, 0.3352 +/- 0.003). In contrast to convention single-surface phosphor-in-glass (SS-PiG) LEDs, the performance exhibited an illumination of 380 lm, average CCT of 5830 K +/- 758 K, and CIE of (0.3083 +/- 0.07, 0.3172 +/- 0.07). These indicated that the performance of the FS-PiG LEDs was higher than the SS-PiG LEDs for illumination, CCT, and CIE by 1.7, 7, and 23 times, respectively. Furthermore, the FS-PiG LEDs demonstrate a lower lumen loss of 2% and a reduced chromaticity shift of 5.4 x 10-3 under accelerated aging at 350 degrees C for 1008 h, owing to the high ceramic melting temperature of up to 510 degrees C. In this study, the proposed FS-PiG large-view scale LEDs with excellent optical performance and high reliability may be promising candidates to replace the conventional phosphor-in-organic silicone material used in high-power LEDs for the next generation of sensor light sources, display, and headlight applications.

引用

页数：17