Synthesis, structure, and luminescence characteristics of far-red emitting Mn4+-activated LaScO3 perovskite phosphors for plant growth. Issue 58 (25th September 2018)

• Record Type: Journal Article
• Authors: Sun, Liangling; Devakumar, Balaji; Guo, Heng; Liang, Jia; Li, Bin; Wang, Shaoying; Sun, Qi; Huang, Xiaoyong
• Is Part Of: RSC advances. Volume 8:Issue 58(2018)
• Page Start: 33035
• Page End: 33041
• Publication Date: 2018-09-25
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra06629a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Far-red emitting Mn 4+ -activated LaScO3 perovskite phosphors were investigated for indoor plant growth lighting. Abstract : Far-red emitting phosphors LaScO3 :Mn 4+ were successfully synthesized via a high-temperature solid-state reaction method. The X-ray powder diffraction confirmed that the pure-phase LaScO3 :Mn 4+ phosphors had formed. Under 398 nm excitation, the LaScO3 :Mn 4+ phosphors emitted far red light within the range of 650–800 nm peaking at 703 nm (14 225 cm −1 ) due to the 2 Eg → 4 A2g transition, which was close to the spectral absorption center of phytochrome PFR located at around 730 nm. The optimal doping concentration and luminescence concentration quenching mechanism of LaScO3 :Mn 4+ phosphors was found to be 0.001 and electric dipole–dipole interaction, respectively. And the CIE chromaticity coordinates of the LaScO3 :0.001Mn 4+ phosphor were (0.7324, 0.2676). The decay lifetimes of the LaScO3 :Mn 4+ phosphors gradually decreased from 0.149 to 0.126 ms when the Mn 4+ doping concentration increased from 0.05 to 0.9 mol%. Crystal field analysis showed that the Mn 4+ ions experienced a strong crystal field in the LaScO3 host. The research conducted on the LaScO3 :Mn 4+ phosphors illustrated their potential application in plant lighting to control or regulate plant growth.