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Enhanced light extraction from SrGa2S4 : Eu2+ film phosphors coated with various sizes of polystyrene nanosphere monolayers

Ko, Ki Young and Lee, Keyong Nam and Lee, Young Kwang and Do, Young Rag (2008) Enhanced light extraction from SrGa2S4 : Eu2+ film phosphors coated with various sizes of polystyrene nanosphere monolayers. JOURNAL OF PHYSICAL CHEMISTRY C, 112 (20). pp. 7594-7598.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp800115r

Abstract

Hexagonally close-packed, two-dimensional (2D), polystyrene (PS) nanosphere photonic crystal (PC) monolayers were coated on sputtered SrGa2S4:Eu2+ films using a process involving the self-assembly of PS nanospheres and the simple transfer of the PS nanosphere monolayers to the phosphor surface. The overall aim of this study was to improve the efficiency of light extraction from the phosphor side of the SrGa2S4: Eu2+ films. The effects of using PS nanospheres of various diameters (330, 580, and 960 nm) on the extraction efficiency of the SrGa2S4:Eu2+ film phosphors were investigated. The integrated photoluminescence extraction was improved by a factor of 4.3 with respect to that of a conventional SrGa2S4:Eu2+ film phosphor through the addition of a 2D monolayer array of 580-nm PS nanospheres with highly crystalline PS monolayer domains.

Item Type:Article
Subjects:Material Science > Nanochemistry
Physical Science > Photonics
ID Code:1466
Deposited By:Farnush Anwar
Deposited On:12 Dec 2008 14:08
Last Modified:12 Dec 2008 14:08

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