Effect of sintering temperature on the emission-spectrum-shape-evolution of Sr2SiO4:Eu2+ phosphor

White‐light‐emitting diodes (WLEDs) are the main white light source for general lighting due to high‐luminous efficacy (>150 lm W−1), long lifespan (5 × 104 h), and environmentally friendly properties. Despite the current maturity and reliability of the solid state‐lighting field, the control of the correlated color temperature (CCT) tuning is still a challenge, arising from the lack of red emission color in the current design of commercial WLEDs. Moreover, as this aspect is often associated with dysregulations of the human circadian rhythm, the need for novel WLEDs is of enlarged societal relevance. In this scope, herein, warm WLED prototypes are fabricated by coating near‐UV‐emitting LEDs with a mixture of the yellow‐emitting polyphasic Sr2SiO4:Eu(II) (S2S) and the blue‐emitting BaMgAl10O17:Eu(II) (BAM) phosphors dispersed in poly(methyl methacrylate). As the amount of S2S increases in the phosphor mixture, the CCT values of the WLEDs decrease from 6500 K (ideal for daylight application) to 4000 K (ideal for night light application), with a luminous efficacy of radiation of 404 lm W−1, among the best figures of merit for WLEDs. Furthermore, all the WLED devices also display a desirable color rendering index (CRI > 75), comparable with the commercial WLED, independent on the operating voltage.

show abstract

Eu(II)‐Activated Silicates for UV Light‐Emitting Diodes Tuning into Warm White Light

Bispo‐Jr

Lima

Carlos

et al. 2020

Adv Eng Mater

View full text Add to dashboard Cite

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Effect of sintering temperature on the emission-spectrum-shape-evolution of Sr2SiO4:Eu2+ phosphor

Cited by 1 publication

References 25 publications

Eu(II)‐Activated Silicates for UV Light‐Emitting Diodes Tuning into Warm White Light

Eu(II)‐Activated Silicates for UV Light‐Emitting Diodes Tuning into Warm White Light

Contact Info

Product

Resources

About