Efficient and tunable Mn2+ sensitized luminescence via energy transfer of a novel red phosphor Ca19Mn2(PO4)14: Eu2+ for white LED |
| |
Affiliation: | 1. Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China;2. Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) and Key Laboratory of Sustainable Resources Processing and Advanced Materials of Hunan Province College, Hunan Normal University, Changsha, 410081, China;3. Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China;4. Department of Gastrodigest, Affiliated Xiaolan Hospital, Southern Medical University, No. 65 Jucheng Rd, Xiaolan Dist, Zhongshan, 528415, China |
| |
Abstract: | The exploration of efficient and high-purity red phosphors is an urgent need in LED development. Due to the compact and compositional-tunable structure of whitlockite compound, manganese-based Ca19Mn2(PO4)14 is chosen as phosphor host for Eu2+ sensitization. Rietveld refinement, steady-state spectra, decay lifetime analysis and temperature-dependent emission spectra were investigated and clearly discussed. Under 360 nm excitation, Ca19Mn2(PO4)14: Eu2+ shows a strong Mn2+ sensitized emission at 655 nm with FWHM of 82 nm, benefiting from the short-distance-induced high-efficient Eu2 -Mn2+ energy transfer. Emission engineering of Ca19Mn2(PO4)14: Eu2+ is achieved by Sr2+ co-doping, leading to both tunable peak wavelength (ranging from 650 to 610 nm) and improved intensity (130% of original value). Moreover, Ca19Mn2(PO4)14: Eu2+ exhibits a promising thermal stability where only 40% of emission intensity is lost at 200 °C. Finally, we explored the working performance of the fabricated RGB phosphor-converted white LED. The present work indicates that Ca19Mn2(PO4)14: Eu2+ phosphor is of great potential as a promising and efficient red phosphor in phosphor-converted white LED. |
| |
Keywords: | Whitlockite Phosphor Luminescence Energy transfer |
本文献已被 ScienceDirect 等数据库收录! |
|