Full-visible-spectrum lighting realized by a novel Eu2+-doped nitride-based cyan-emitting phosphor. Issue 30 (13th July 2021)

• Record Type: Journal Article
• Authors: Zhang, Weibin; Li, Yongwang; Ye, ShanShan; Zhou, Jiangcong; Wu, Dewu; Shi, Chen; Chen, Mengting; Ding, Jianyan; Wu, Quansheng
• Is Part Of: Dalton transactions. Volume 50:Issue 30(2021)
• Page Start: 10446
• Page End: 10454
• Publication Date: 2021-07-13
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1dt01698a
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Cyan phosphor of Ca2 BN2 Cl:Eu 2+ is used to realize full spectrum lighting. Abstract : Cyan phosphors have attracted considerable attention in recent years as an indispensable component for realizing full-spectrum lighting. In this study, a novel nitride-based cyan-emitting phosphor Ca2 BN2 Cl:Eu 2+ was successfully prepared. Its crystal structure refined by the Rietveld refinement reveals that Ca2 BN2 Cl is formed by a tight host lattice and the edge-sharing Ca(N, Cl)4 tetrahedrons along with multiple crystallographic Ca sites for Eu 2+ ions to occupy, which corresponds to its broad emission band. Under the near ultraviolet (NUV) light excitation, Ca2 BN2 Cl:Eu 2+ emits a broad-band cyan light and its full width at half-maximum (FWHM) can reach 121 nm, which effectively compensates the "cyan cavity". The time-resolved photoluminescence (TRPL) spectra of Ca2 BN2 Cl:Eu 2+ were investigated to expose the energy transfer between the multiple luminescent centers. Furthermore, the temperature-dependent spectra of Ca2 BN2 Cl:Eu 2+ were measured to evaluate its thermal stability. All of the discussion and results reveal that Ca2 BN2 Cl:Eu 2+ is a promising cyan phosphor for use in white light-emitting diodes to realize full-spectrum lighting.