Performance optimization of Ce:YAG sapphire films for high power density white laser-driven lighting applications

Zhao, Cong; Bao, Shuyang; Wen, Qianxiong; Xu, Li; Wang, Luhan; Wang, Xidong; Sun, Xiangjia; Liang, Xiaojuan; Zhang, Le; Xiang, Weidong

doi:10.1016/j.ceramint.2023.02.240

Cited by 7 publications

(3 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…islands, and remote areas, there are still problems related to electrification, so there are programs made by the Indonesian government, such as the LisDes program, the LTSHE program, the construction of PLTD (Diesel Power Plant) and PLTS (Solar Power Plant), etc., to electrify these areas. 4.…”

Section: Comparison With Other Asean Countriesmentioning

confidence: 99%

“…The invention of artificial lighting allowed humanity to free itself from the solar cycle and the length of the day. After the mastery of fire, the invention of the torch, the oil lamp, discharge lamps, and gas or incandescent lamps in particular, the latest revolution in the world of lighting obviously concerns the LED lamp, which continues to steadily increase its energy efficiency to reach today around 160 lm/W with lifespans of over 50,000 h (as a reminder: the incandescent lamp, 14 lm/W and 1500 h) [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Status of Lighting Technology Application in Indonesia

et al. 2023

View full text Add to dashboard Cite

In 2019, Indonesia’s electricity consumption exceeded 278 TWH, or about 1.08 MWh/capita. This value shows a considerable increase in electricity consumption which has doubled in just a decade. Previous studies have shown that the proportion of electricity consumption used for lighting needs is correlated to the country’s GDP. This is generally around 20 to 50% of electricity production but can go up to 86% in the case of Tanzania. Indonesia is the 4th country in the world in terms of population and its lighting market as well as its lighting-related energy consumption has a strong impact on several levels: societal, environmental but also economic and energy. Having a knowledge of the lamps used by the Indonesian people is therefore particularly interesting and important, in particular in the context which presents a great societal diversity but also in a context of energy saving. Indonesia is an archipelagic country made up of 5 large islands and over 17,000 small islands with widely varying levels of population density. This island geography leads Indonesia to face challenges in the distribution and production of electrical energy, which affects the use of lamps in various types of regions. The overview of this study was done by collecting data from various sources, especially BPS (Biro Pusat Statistik/Statistic Center Bureau of Indonesia), CLASP (an NGO for clean energy), the Ministry of Energy and Mineral Resources of Indonesia (ESDM), PLN (Indonesian Electrical Company), etc. The data obtained from these sources provides several descriptions of general lighting conditions in Indonesia viewed from several angles, such as growth of lamp market, use of lamp types, percentage of use of lamps with energy saving (ESL), etc. Considering that Indonesia has various regional characteristics, in this study, the survey of a total of 394 respondents was conducted on the use of lamps by creating regional categories based on electrical conditions, power consumption, and electricity per capita, among others. The categories of areas observed fall into 5 types based on their population and geography: large cities, small towns, rural/village areas, islands and remote areas. The results of compiling data from these various sources show that the types of lamps used by Indonesians follow the lighting trend in the world. The use of LED lamps has a utilization percentage of around 52%, much higher than other types of lamps such as CFL, fluorescent or incandescent. Based on the survey conducted, it is known that the widely used LED power is between 1 and 10 watts with a usage time of 8 to 12 h per day. In the next few years, it is estimated that the use of LEDs in Indonesia will increase as the government has prepared various regulations and policies related to energy saving, one of which relates to lighting.

show abstract

Section: Comparison With Other Asean Countriesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Status of Lighting Technology Application in Indonesia

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Besides, another area of improvement is in enhancing the luminescence saturation threshold (LST) of YAG:Ce based phosphors. The findings from various published studies indicate that both composite ceramic containing Al 2 O 3 and YAG:Ce and single-crystalline YAG:Ce exhibit superior LST compared to other types of YAG:Ce phosphors, such as YAG:Ce phosphor embedded in glass (phosphor-in-glass) or phosphor layers [6,7]. In the case of single crystal YAG:Ce phosphors, it is seen that they possess an exceptionally high LST, with no indication of a decline in luminescence intensity or luminous flux even when the laser pump power density reaches 360 Wmm −2 [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Comparative study of composite single crystal and polycrystalline YAG:Ce phosphors for laser-based lighting applications

Chakraborty,

Hasan,

Jadwisienczak

et al. 2024

J. Phys. Photonics

View full text Add to dashboard Cite

YAG:Ce, a widely employed phosphor for LED wavelength conversion applications, comes in different forms, including polycrystal (powder), single crystal, and composite single crystal varieties. We investigated Epoch NeoTM, a composite single crystal incorporating Al2O3 as a heat distribution and optical guiding material embedded within its luminescent core. The properties of Epoch Neo were analyzed and compared with those of its polycrystal counterparts in this paper. Cosine corrector was used to ensure accurate spectral measurements. Multiple characterization techniques like chromaticity points, color temperature, phosphor temperature, and speckle pattern were employed to study the effect of variable laser input power on both polycrystal powder and composite single crystal of YAG:Ce. It was found that under the influence of pumping blue laser high input optical power the composite single crystal phosphor’s performance was significantly better compared to that of the polycrystal.

show abstract

Advancing High‐Power Laser Lighting: Designing a Novel YAGG:Ce Color Converter in Li–Al–Si Glass Ceramic

Zheng,

Liu,

Liang

et al. 2024

Laser & Photonics Reviews

View full text Add to dashboard Cite

In laser illumination, there is considerable interest in phosphor‐converted laser diodes that boast high efficiency and exceptional thermal stability. Phosphor‐in‐glass (PiG) and phosphor‐in‐glass film (PiF) are highly favored for their efficiency, cost‐effectiveness, and ease of fabrication. To tackle the issue of low thermal conductivity of glass, a novel lithium–aluminum–silicate glass is innovatively developed. This glass induces the precipitation of spodumene crystalline phase, enhancing material stability. Utilizing solid‐state sintering techniques, Y3Al3.5Ga1.5O12:Ce3+ (YAGG:Ce) PiG is fabricated, which exhibited a luminous flux (LF) of 866.76 lm under 450 nm blue light with 3.88 W input power. Benefiting from the high thermal conductivity of sapphire substrate and the high‐intensity glass system, YAGG:Ce PiF demonstrated a saturation threshold of 10.20 W, yielding an impressive LF of 2178.1 lm, which is 2.5 times that of PiG samples. Notably, the thermal conductivity increased significantly from 2.2 W m−1K−1 (PiG) to 7.0 W m−1K−1 (PiF), surpassing traditional organic resin materials. To validate the practicality of the two‐color converters, it integrates them into both starlight lamp and laser flashlight modules for encapsulation, thereby generating attractive green light in various environments. This design holds the potential to become the ideal choice for the next generation of high‐power, high‐brightness laser illumination.

show abstract

Performance optimization of Ce:YAG sapphire films for high power density white laser-driven lighting applications

Cited by 7 publications

References 40 publications

Status of Lighting Technology Application in Indonesia

Status of Lighting Technology Application in Indonesia

Comparative study of composite single crystal and polycrystalline YAG:Ce phosphors for laser-based lighting applications

Advancing High‐Power Laser Lighting: Designing a Novel YAGG:Ce Color Converter in Li–Al–Si Glass Ceramic

Contact Info

Product

Resources

About