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Shape‐Induced Enhanced Luminescent Properties of Red Phosphors: Sr 2 MgSi 2 O 7 :Eu 3+ Nanotubes
Author(s) -
Wan Junxi,
Wang Zhenghua,
Chen Xiangying,
Mu Li,
Qian Yitai
Publication year - 2005
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200500502
Subject(s) - phosphor , luminescence , chemistry , hydrothermal circulation , fluorescence , ion , red color , excitation , nanotechnology , chemical engineering , optoelectronics , optics , materials science , organic chemistry , physics , engineering , electrical engineering
Sr 2 MgSi 2 O 7 :Eu 3+ nanotubes with red phosphor luminescent properties were successfully synthesized via a low‐temperature hydrothermal route in order to understand the underlying relationship between shape and luminescent properties. The one‐dimensional shape results in an obvious improvement of color purity. From emission spectra, the relative intensity of 5 D 0 → 7 F 2 to 5 D 0 → 7 F 1 transitions in tubular phosphors is higher than that of bulk material. The better color purity results from the more distorted lattices and relatively lower crystal symmetry around Eu 3+ ions, which ascribes to the large surface area due to synthesize it in the form of nanotubes. Furthermore, the as‐synthesized tubular red phosphor has shorter fluorescent lifetime and blue‐shiftphenomenon in excitation spectra than that of the bulk counterpart. Based on these results, shape‐induced luminescent properties improvement is proposed as an efficient way to obtain red phosphors with high color purity. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)