title: An efficient orange-red-emitting LiNa3P2O7:Sm3+pyrophosphate: Structural and optical analysis for solid-state lighting.
abstract: A trivalent rare-earth ion (Sm3+)-doped LiNa3P2O7(LNPO) phosphor was synthesized using a conventional high-temperature solid-state reaction route. A predominant orthorhombic phase of LNPO was observed in all X-ray diffraction patterns. The surface states of the LNPO:Sm phosphor were confirmed by X-ray photoelectron spectroscopy. Under 401 nm excitation, the Sm-doped LNPO phosphors showed sharp emission peaks at 563, 600 and 647 nm that are related to the f-f transition of Sm3+ions. The optimum concentration of Sm3+(9 mol%) produced Commission Internationale de l'Eclairage chromaticity coordinates, color rendering index and correlated color temperature of (0.564, 0.434), 42 and 1843 K, respectively.
authors.affiliation: School of Mechanical Engineering, Yeungnam University, Gyeongsan, South Korea.
authors.forename: G R
authors.initials: GR
authors.lastname: Dillip
authors.affiliation: Department of Physics, Sri Venkateswara University, Tirupati, India.|School of Physical Sciences, Reva University, Bangalore, India.
authors.forename: K
authors.initials: K
authors.lastname: Munirathnam
authors.affiliation: Department of Future Studies, Sri Venkateswara University, Tirupati, India.
authors.forename: B Deva Prasad
authors.initials: BDP
authors.lastname: Raju
authors.affiliation: Department of Biotechnology, Sri Padmavathi Women's University, Tirupati, India.
authors.forename: N John
authors.initials: NJ
authors.lastname: Sushma
authors.affiliation: School of Mechanical Engineering, Yeungnam University, Gyeongsan, South Korea.
authors.forename: S W
authors.initials: SW
authors.lastname: Joo
mesh_terms: D003116:Color; D011756:Diphosphates / Q000138:chemical synthesis / Q000737:chemistry*; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry*; D008163:Luminescent Measurements; D008855:Microscopy, Electron, Scanning; D056951:Photoelectron Spectroscopy; D012493:Samarium / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D011756:Diphosphates; D049408:Luminescent Agents; D012493:Samarium
keywords: LNPO phosphor; X-ray photoelectron spectroscopy; color rendering index; solid-state reaction