Enhanced light extraction from organic light-emitting devices by using microcontact printed silica colloidal crystals

被引：58

作者：

Li, Feng ^{[1
]}

Li, Xiao ^{[1
]}

Zhang, Junhu ^{[1
]}

Yang, Bai ^{[1
]}

机构：

[1] Jilin Univ, Minist Educ, Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

来源：

ORGANIC ELECTRONICS | 2007年 / 8卷 / 05期

基金：

中国国家自然科学基金;

关键词：

organic light-emitting devices; light extraction; light outcoupling; silica microsphere arrays;

D O I：

10.1016/j.orgel.2007.06.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

One simple method to increase the light extraction from organic light-emitting devices by using microcontact printed silica colloidal crystals is demonstrated. A close-packed hexagonal silica microsphere arrays is pressed into poly(vinyl alcohol) layer that is spin-coated on the opposite side of the indium-tin-oxide-coated glass substrate. This structure has the similar characteristics of microlens arrays. By using the silica microspheres with the diameters of 400 and 1000 nm those were half pressed into poly(vinyl alcohol), the luminance efficiencies of the devices in the normal direction are increased by a factor of 1.6 and 1.3 at the current density of 7.0 mA/cm(2) compared to that of the device using flat glass substrate, respectively, and the shapes of emission spectra exhibit almost no angle dependence. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：635 / 639

页数：5

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