Extremely Efficient Indium-Tin-Oxide-Free Green Phosphorescent Organic Light-Emitting Diodes

TitleExtremely Efficient Indium-Tin-Oxide-Free Green Phosphorescent Organic Light-Emitting Diodes
Publication TypeJournal Article
Year of Publication2012
AuthorsCai M, Ye Z, Xiao T, Liu R, Chen Y, Mayer RW, Biswas R, Ho KM, Shinar R, Shinar J
Journal TitleAdvanced Materials
Volume24
Pages4337-4342
Date Published08/16
Type of ArticleArticle
ISBN Number0935-9648
Accession NumberWOS:000307163000018
Keywordsdopants, electrodes, electroluminescent devices, EMISSION, ENHANCEMENT, high efficiency OLEDs, highly conductive polymer, ITO-free PHOLEDs, microcavities, PEDOT:PSS multilayered anode, phosphorescent OLEDs, quantum efficiency, simulation, solar-cells, weak microcavity effect
Abstract

This paper demonstrates extremely efficient (eta(P,max) = 118 lm W-1) ITO-free green phosphorescent OLEDs (PHOLEDs) with multilayered, highly conductive poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT: PSS) films as the anode. The efficiency is obtained without any outcoupling-enhancing structures and is 44% higher than the 82 lm W-1 of similar optimized ITO-anode PHOLEDs. Detailed simulations show that this improvement is due largely to the intrinsically enhanced outcoupling that results from a weak microcavity effect.

URL<Go to ISI>://WOS:000307163000018
DOI10.1002/adma.201202035
Alternate JournalAdv. Mater.