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Achieving high efficiency and improved stability in ITO-free transparent organic light-emitting diodes with conductive polymer electrodes

 
: Kim, Y.H.; Lee, J.; Hofmann, S.; Gather, M.C.; Müller-Meskamp, L.; Leo, K.

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Advanced Functional Materials 23 (2013), Nr.30, S.3763-3769
ISSN: 1616-301X
ISSN: 1616-3028
Englisch
Zeitschriftenaufsatz
Fraunhofer COMEDD; 2015 ()

Abstract
Efficient transparent organic light-emitting diodes (OLEDs) with improved stability based on conductive, transparent poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) electrodes are reported. Based on optical simulations, the device structures are carefully optimized by tuning the thickness of doped transport layers and electrodes. As a result, the performance of PEDOT:PSS-based OLEDs reaches that of indium tin oxide (ITO)-based reference devices. The efficiency and the long-term stability of PEDOT:PSS-based OLEDs are significantly improved. The structure engineering demonstrated in this study greatly enhances the overall performances of ITO-free transparent OLEDs in terms of efficiency, lifetime, and transmittance. These results indicate that PEDOT:PSS-based OLEDs have a promising future for practical applications in low-cost and flexible device manufacturing. Transparent organic light-emitting diodes (OLEDs) with conductive, transparent poly(3,4-eth ylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) electrodes are carefully optimized by tuning the device structure. The efficiency of PEDOT:PSS-based OLEDs is comparable to that of conventional indium tin oxide-based OLEDs. Long-term stability of OLEDs with PEDOT:PSS is significantly improved, showing a promising future for practical applications.

: http://publica.fraunhofer.de/dokumente/N-264455.html