Stable angular emission spectra in white organic light-emitting diodes using graphene/PEDOT:PSS composite electrode

Stable angular emission spectra in white organic light-emitting diodes using graphene/PEDOT:PSS composite electrode

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 g...

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Veröffentlicht in:Optics express 2017-05, Vol.25 (9), p.9734-9742
Hauptverfasser: Cho, Hyunsu, Lee, Hyunkoo, Lee, Jonghee, Sung, Woo Jin, Kwon, Byoung-Hwa, Joo, Chul-Woong, Shin, Jin-Wook, Han, Jun-Han, Moon, Jaehyun, Lee, Jeong-Ik, Cho, Seungmin, Cho, Nam Sung
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container_end_page 9742
container_issue 9
container_start_page 9734
container_title Optics express
container_volume 25
creator Cho, Hyunsu
Lee, Hyunkoo
Lee, Jonghee
Sung, Woo Jin
Kwon, Byoung-Hwa
Joo, Chul-Woong
Shin, Jin-Wook
Han, Jun-Han
Moon, Jaehyun
Lee, Jeong-Ik
Cho, Seungmin
Cho, Nam Sung
description 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 (Δxy) of OLEDs based on graphene/PEDOT:PSS composite electrodes is 0.018, less than that based on graphene-only electrode, i.e.,0.027.
doi_str_mv 10.1364/OE.25.009734
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title Stable angular emission spectra in white organic light-emitting diodes using graphene/PEDOT:PSS composite electrode
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