A new series of long wavelength red phosphors BaLaLiTe1-xO6:xMn4+ for plant cultivation LED. Issue 8 (15th April 2022)

• Record Type: Journal Article
• Authors: Liu, Wen; Zhao, Dan; Zhang, Rui-Juan; Jia, Lei; Zhang, Li-Na; Shi, Lin-Ying
• Is Part Of: Ceramics international. Volume 48:Issue 8(2022)
• Page Start: 10895
• Page End: 10901
• Publication Date: 2022-04-15
• Subjects: Mn4+ -- Photoluminescence -- Phosphor -- Plant growth LED; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.12.306
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Mn 4+ doped phosphors have been attracted more and more attention because their emitting spectra can be absorbed by chlorophyll or phytochrome (Pr and Pfr ) of plants. Herein, we prepared a new series of phosphors BaLaLiTe1- x O6 : x Mn 4+ (BLLT: x Mn 4+, x = 0.002–0.014) by solid state reaction method. Their structure and phase purity were verified by X-ray diffraction (XRD) analysis. Under 336 nm exciting, BLLT: x Mn 4+ can emit long wavelength red light at around 700 nm, which fits well with the Pfr spectra of plants. The Mn 4+ concentration was optimized to be x = 0.01, and when it was exceeded, concentration quenching would occur. The internal (IQE) and external quantum efficiency (EQE) of BLLT:0.01Mn 4+ were measured to be 32% and 23% by direct method. Besides, the BLLT:0.01Mn 4+ possesses good thermostability, remaining 76% of the integrated intensity at 423 K of that at 298 K. Hence, we think BLLT:0.01Mn 4+ have potentially applications for plant growth LED.