PEDT/PSS for efficient hole-injection in hybrid organic light-emitting diodes

Elschner, Andreas; Bruder, Friedrich‐Karl; Heuer, H.-W; Jonas, Friedrich; Karbach, A.; Kirchmeyer, Stephan; Thurm, S; Wehrmann, Rolf

doi:10.1016/s0379-6779(99)00328-8

Cited by 215 publications

(123 citation statements)

References 10 publications

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“…The homogeneous polymer complex of poly-ethylenedioxythiophene (PEDOT), oxidized with polystyrene sulphonate (PSS), has extensively been used as buffer layer in organic optoelectronic applications due to its high electrical conductivity and transparency in the visible region [1][2][3][4][5]. However, degradation related issues of PEDOT: PSS can be a parameter that might influence the lifetime performance of organic optoelectronic devices and other applications in which it participates [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Conductivity Degradation Study of PEDOT: PSS Films under Heat Treatment in Helium and Atmospheric Air

Vitoratos¹,

Sakkopoulos²,

Paliatsas³

et al. 2012

OJOPM

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PEDOT:PSS buffer layers have been processed with the standard annealing step used for organic solar cells device applications. The d.c. conductivity σ as a function of temperature for two heating rates under He and atmospheric air was studied. Moreover, the stability of the conductivity was investigated at different temperatures and environments vs time.The main results can be summarized in the following: the increase of σ due to the thermal activation of the carriers and the improvement of the crystallinity compete with the decrease of σ resulting from the irreversible structural degradation of the polymer chains promoted by the oxygen and moisture of the atmospheric air. The heat treatment time and the temperature at which the two competing mechanisms result in a maximum of the electrical conductivity have been determined and results are discussed relevant to organic optoelectronic devices containing PEDOT: PSS buffer layers.

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Section: Introductionmentioning

confidence: 99%

Conductivity Degradation Study of PEDOT: PSS Films under Heat Treatment in Helium and Atmospheric Air

Vitoratos¹,

Sakkopoulos²,

Paliatsas³

et al. 2012

OJOPM

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“…The cathode used consists of a thin LiF layer (0.5 nm) as the electron injection layer and a thick Al layer as the metal electrode. [25] The stack of organic layers on ITO in sequence consists of a thin layer (~30 nm) of conducting polymer poly(ethylene dioxythiophene)/poly(styrene sulphonate) (PEDT:PSS, Bayer Corp.) as the hole injection layer [26] and other functional layers of low molecular weight. Considering the ambipolar nature of the present terfluorenes, we first explored the device architecture comprising only a single layer of TDAF sandwiched between the hole-injection contact and the electron-injection contact (i.e., devices S-1 and S-2).…”

mentioning

confidence: 99%

Efficient Organic Blue‐Light‐Emitting Devices with Double Confinement on Terfluorenes with Ambipolar Carrier Transport Properties

Wu¹,

Lin

Wong³

et al. 2004

Advanced Materials

353

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Ter(9,9‐diarylfluorene)s (TDAFs) exhibit many intriguing properties promising for blue light‐emitting devices, such as high thin‐film photoluminescence quantum yields (∼ 90 %), high glass‐transition temperatures (> 200 °C), and an unusual ambipolar carrier‐transport capability. Successful implementation of a double‐ heterostructure device configuration that provides effective confinement of both carriers and excitons in TDAFs results in an electroluminescence performance (5.3 % external quantum efficiency) promising for application in blue‐emitting devices.

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“…Although these conductive polymers have been shown to increase hole injection fluence (they may also to some degree planarize the surface and prevent local shorts) [13] and hence PLED device performance, none is ideal because of their significant absorption in the visible region and the unstable interface they form with ITO, as exemplified by the ITO/PEDOT±PSS interface. [14,15] Contemporaneously, there have been several efforts to modify electrode±polymer interfaces with self-assembled monolayers (SAMs).…”

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confidence: 99%

High‐Brightness Blue Light‐Emitting Polymer Diodes via Anode Modification Using a Self‐Assembled Monolayer

et al. 2003

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Device perfomance of a blue‐emitting polyfluorene‐based single‐layer light‐emitting diode are considerably enhanced by the inclusion of a self‐assembled monolayer (SAM) of a hole‐transporting material (see Figure). The SAM of silyl‐functionalized triarylamine (TPD‐Si2) is inserted between the ITO anode and the active layer, offering improved hole injection, low visible absorption, and high stability.

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PEDT/PSS for efficient hole-injection in hybrid organic light-emitting diodes

Cited by 215 publications

References 10 publications

Conductivity Degradation Study of PEDOT: PSS Films under Heat Treatment in Helium and Atmospheric Air

Conductivity Degradation Study of PEDOT: PSS Films under Heat Treatment in Helium and Atmospheric Air

Efficient Organic Blue‐Light‐Emitting Devices with Double Confinement on Terfluorenes with Ambipolar Carrier Transport Properties

High‐Brightness Blue Light‐Emitting Polymer Diodes via Anode Modification Using a Self‐Assembled Monolayer

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