Abstract
AbstractSr2MgSi2O7:Eu3+ 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 5D0→7F2 to 5D0→7F1 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 Eu3+ 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)
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