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Journal Article
Stable Angular Emission Spectra in White Organic Light-emitting Diodes using Graphene/PEDOT:PSS Composite Electrode
- Authors
- Hyunsu Cho, Hyunkoo Lee, Jonghee Lee, Woo Jin Sung, Byoung-Hwa Kwon, Chul-Woong Joo, Jin-Wook Shin, Jun-Han Han, Jaehyun Moon, Jeong-Ik Lee, Seungmin Cho, Nam Sung Cho
- Issue Date
- 2017-05
- Citation
- Optics Express, v.25, no.9, pp.9734-9742
- ISSN
- 1094-4087
- Publisher
- Optical Society of America(OSA)
- Language
- English
- Type
- Journal Article
- Abstract
- In this work, we suggest a graphene/poly (3, 4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) composite as a transparent electrode for stabilizing white emission of organic light-emitting diodes (OLEDs). Graphene/PEDOT:PSS composite electrodes have increased reflectance when compared to graphene itself, but their reflectance is still lower than that of ITO itself. Changes in the reflectance of the composite electrode have the advantage of suppressing the angular spectral distortion of white emission OLEDs and achieving an efficiency of 16.6% for white OLEDs, comparable to that achieved by graphene-only electrodes. By controlling the OLED structure to compensate for the two-beam interference effect, the CIE color coordinate change (?봷y) of OLEDs based on graphene/PEDOT:PSS composite electrodes is 0.018, less than that based on graphene-only electrode, i.e., 0.027.
- KSP Keywords
- 4-Ethylenedioxythiophene(EDOT), Composite Electrode, Interference effects, Organic light-emitting diodes(OLEDS), Polystyrene sulfonate, Spectral distortion, Two-beam interference, White organic light-emitting diodes, color coordinates, emission spectra, light-emitting diode(LED)
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
