摘要The enhancement of the photoluminescence of micro-Sr2Si5N8:Eu2+ phosphors on the surface of Ag and Au nanoparticles is studied. Ag nanoparticles cause a considerable enhancement in the photoluminescence intensity of microsized Sr2Si5N8:Eu2+ phosphors. We further investigate the enhanced emission of self−assembled worm-like Au nanoparticles from Sr2Si5N8:Eu2+ phosphors. A brightness photoluminescence intensity enhanced by about six times is observed, and is due to the stronger scattering and higher numbers of hot spots in the Au worms. The luminescence efficiency of the microparticles is higher than the nanoparticles, and it is very difficult to enhance light emission. Therefore, the realization of microphosphor photoluminescence enhancement is a great breakthrough.
Abstract：The enhancement of the photoluminescence of micro-Sr2Si5N8:Eu2+ phosphors on the surface of Ag and Au nanoparticles is studied. Ag nanoparticles cause a considerable enhancement in the photoluminescence intensity of microsized Sr2Si5N8:Eu2+ phosphors. We further investigate the enhanced emission of self−assembled worm-like Au nanoparticles from Sr2Si5N8:Eu2+ phosphors. A brightness photoluminescence intensity enhanced by about six times is observed, and is due to the stronger scattering and higher numbers of hot spots in the Au worms. The luminescence efficiency of the microparticles is higher than the nanoparticles, and it is very difficult to enhance light emission. Therefore, the realization of microphosphor photoluminescence enhancement is a great breakthrough.
[1] Hutter E and fendler J H 2004 Adv. Mater. 16 1685
[2] Link S and El-Sayed M A 1999 J. Phys. Chem. B 103 8410
[3] Hao E C and Schatz G C 2004 J. Chem. Phys. 120 357
[4] Zhang Z Y and Zhao Y P 2007 J. Appl. Phys. 102 113308
[5] Wu Y, Yang X and Leung P T 1999 Opt. Lett. 24 345
[6] Wu Y 2000 Phys. Rev. A 61 033803
[7] Wu Y and P T Leung 1999 Phys. Rev. A 60 630
[8] Soganci I M, Nizamoglu S, Mutlugun E, Akin O and Demir H V 2007 Opt. Express 15 14289
[9] Kulakovich O, Strekal N, Yaroshevich A, Maskevich S, Gaponenko S, Nabiev I, Woggon U and Artemyev M 2002 Nano Lett. 2 1429
[10] Biteen J S, Pacifici D, Lewis N S and Atwater H A 2005 Nano Lett. 5 1768
[11] Pompa P P, Martiradonna L, Torre A D, Sala F D, Manna L, Vittorio M D, Calabi F, Cingolani R and Rinaldi R 2006 Nature Nanotechnol. 1 126
[12] Chen Y, Munechika K and Ginger D S 2007 Nano Lett. 7 690
[13] Aslan K, Wu M, Lakowicz J R and Geddes C D 2007 J. Am. Chem. Soc. 129 1524
[14] Cheng P, Li D S, Yuan Z Z, Chen P L and Yang D R 2008 Appl. Phys. Lett. 92 041119
[15] Liu K W, Tang Y D, Cong C X, Sum T C, Huan A C, Shen Z X, Wang L, Jiang F Y, Sun X W and Sun H D 2009 Appl. Phys. Lett. 94 151102
[16] Schietinger S, Aichele T, Wang H Q, Nann T and Benson O 2010 Nano Lett. 10 134
[17] Chao W H, Wu R J, Tsai C S and Wu T B 2010 J. Appl. Phys. 107 013101
[18] Liu L, Lei J M, Liu Y S, Yang Z and Xu X L 2011 J. Funct. Mater. 42 771
[19] Liu L, Xu X L, Lei J M, Liu Y S and Yang Z 2011 Thin Solid Films 519 5582
[20] Lukomska J, Malicka J, Gryczynski I and Lakowicz J R 2004 J. Fluoresc. 14 417
[21] Li Y Q, van Steen J E J, van Krevel J W H, Botty G, Delsing A C A, DiSalvo F J, de With G and Hintze H T 2006 J. Alloys Compd. 417 273
[22] Kelly K L, Coronado E, Zhao L L, and Schatz G 2003 J. Phys. Chem. B 107 668
[23] Xu G, Tazawa M, Jin P, NaKao S and Yoshimura K 2003 Appl. Phys. Lett. 82 3811
[24] Bohren C F and Huffman D R 1983 Absorption and Scattering of Light by Small Particles (New York: Wiley-Interscience)
[25] Aslan K, Leonenko Z, Lakowicz J R and Geddes C D 2005 J. Fluoresc. 15 643
[26] Atay T, Song J H and Nurmikko A V 2004 Nano Lett. 4 1627
[27] Tam F, Goodrich G P, Johnson B R and Halas N J 2007 Nano Lett. 7 496
[28] Fort E and Gr'esillon S 2008 J. Phys. D: Appl. Phys. 41 013001
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