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Improved output coupling efficiency of a ZnS:Mn thin-film electroluminescent device with addition of a two-dimensional SiO2 corrugated substrate

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5 Author(s)
Do, Y.R. ; Corporate Research & Development Center, Samsung SDI Co., Ltd., Kyeonggi-Do 449-902, Korea ; Kim, Y.-C. ; Cho, S.-H. ; Ahn, J.-H.
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We present a study of the effects of adding a two-dimensional (2-D) SiO2 corrugated substrate onto a ZnS:Mn thin-film electroluminescence (EL) device on its EL properties. Two-step irradiated hologram lithography and reactive ion etching were used to fabricate a 2-D square-lattice-dotted pattern of SiO2 on the glass substrate. The addition of this corrugation leads to a 220% enhancement in the EL efficiency at 40 V above the threshold voltage under a 500-Hz sinusoidal excitation. This improvement in the output coupling efficiency is due to the diffraction scattering produced by the 2-D SiO2 periodic corrugations. © 2003 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:82 ,  Issue: 23 )

Date of Publication:

Jun 2003

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