Novel far-red-emitting SrGdAlO4:Mn4+ phosphors with excellent responsiveness to phytochrome PFR for plant growth lighting. Issue 69 (26th November 2018)

• Record Type: Journal Article
• Authors: Sun, Qi; Wang, Shaoying; Devakumar, Balaji; Li, Bin; Sun, Liangling; Liang, Jia; Chen, Daqin; Huang, Xiaoyong
• Is Part Of: RSC advances. Volume 8:Issue 69(2018)
• Page Start: 39307
• Page End: 39313
• Publication Date: 2018-11-26
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra08551j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : In this paper, we reported on novel Mn 4+ -activated SrGdAlO4 far-red-emitting phosphors with excellent responsiveness to phytochrome PFR for potential application in plant growth lighting. Abstract : In this work, we reported on novel far-red-emitting SrGdAlO4 :Mn 4+ (SGA:Mn 4+ ) phosphors towards application in plant growth lighting. The crystal structure and luminescence properties were investigated on the basis of X-ray diffraction, excitation and emission spectra, luminescence decay curves and temperature-dependent photoluminescence spectra. When excited by 353 nm, the SGA:Mn 4+ phosphors showed a far-red emission band in the 650–800 nm wavelength range with peaks at 709 and 725 nm, which was due to the 2 Eg → 4 A2g electron transition of Mn 4+ ion. The optimal Mn 4+ doping concentration was about 0.1 mol%. The CIE chromaticity coordinates of the SGA:0.1%Mn 4+ sample were (0.7064, 0.2934). The luminescence decay lifetimes decreased gradually from 1.263 to 0.868 ms with the increasing Mn 4+ concentrations. Notably, the emission band of SGA:0.1%Mn 4+ sample was well-matched with the absorption spectrum of phytochrome PFR, which indicated the SGA:Mn 4+ were potential far-red-emitting phosphors for plant growth applications.