A novel narrow band blue-emitting phosphor Rb2ZrSi3O9: Eu2+ with low thermal quenching and high quantum efficiency. Issue 16 (15th August 2021)

• Record Type: Journal Article
• Authors: Zhang, Weibin; Shi, Chen; Ye, ShanShan; Zhou, Jiangcong; Wu, Dewu; Li, Yongwang; Chen, Mengting; Ding, Jianyan; Wu, Quansheng
• Is Part Of: Ceramics international. Volume 47:Issue 16(2021)
• Page Start: 22786
• Page End: 22793
• Publication Date: 2021-08-15
• Subjects: LED -- Blue phosphor -- Narrow-band light-emitting -- Silicate; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.04.297
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Developing phosphors with narrow band emission and excellent performance is the main goal of current leading research. In this study, a novel narrow band blue-emitting phosphor Rb2 ZrSi3 O9 : Eu 2+ was prepared that can be fully excited by near ultraviolet (NUV) light, emits a bright blue light peak at 470 nm, and has a full width at half maximum (FWHM) of 60 nm. The synthesized Rb2 ZrSi3 O9 : Eu 2+ had excellent photoluminescence properties that were reflected in its good thermal stability (up to 82%) and high internal quantum efficiency (up to 75%). These remarkable luminescence properties were mainly ascribed to the highly symmetric and dense crystal structure composed of [Si3 O9 ] 6- ring pairs. Multiple emission centers in the Rb2 ZrSi3 O9 : Eu 2+ phosphor were confirmed through the photoluminescence (PL) spectra and time-resolved (PL) spectra. A bright warm WLED device with a low correlated color temperature (3386 K) and high color-rendering index (CRI~89.3) was produced by combining the blue phosphor with (Sr, Ba)2 SiO4 : Eu 2+ and CaAlSiN3 : Eu 2+ and NUV (380 nm). The results indicate that Rb2 ZrSi3 O9 : Eu 2+ could be a promising phosphor for use in WLEDs. Graphical abstract: Image 1