PEDOT:PSS,

Figure 15-24. Spectral response or devices nude wilh different PEOPT polymer thicknesses Al/C ) (35 nm)/PEOPT (30 nin)/PEDOT-PSS (110 unU/lTO (120 ninj/glass (solid circles) and AI/Cm (35 nm)/PEOPT (40 iini)/Pl DOT-PS.S (110 mn)/lTO (120 ninj/glass (open circles). The absorption spectrum of the PEOPT polymer is plollcd for comparison (solid line) (reproduced by permission of Wiley-VCH from Ref. (92]).

Figure 15-23. Calculalcil value ol ihc square of (lie normalized electrical field i 2 at the Cw/PEOPT interface lor PEOPT thickness of 30 nm (solid line) and 40 nm (dashed line) versus thickness of the CM layer at a wavelength of 460 nin. The inset shows the calculated distribution of the square of Ihc normalized opiical field E ] inside an 1TO (120 mn)/PEDOT-PSS (110 iini)/PEOPT(30 nm)/CW) (32 nm) device at the same wavelength (reproduced by permission of Wilcy-VCH from Ref. 92 ).

PEDOT PSS Poly(3,4-ethylenedioxythiophene) poly(4-styrenesulphonic acid) PPV Poly[(m-phenylenevinylene)-c >-(2,5-dioctoxy-p-... 

LAJs incorporating polymer films on top of the organic SAMs showed that these junctions allow for studying the correlation between electrical properties and chemical structure. Both de Boer et al. [80] (Fig. 7) and Rampi et al. [79], by spin-coating respectively PEDOT PSS and PPV on top of alkane SAMs, extracted from the electrical measurement [i = 0.57 A-1 and [j = 0.90 A-1. Rampi et al. also showed that it is possible to measure electrical properties of polyphenyl chains with a [1 0.61 A, and that the PPV polymer layer is much more conductive that... 

Fig. 12 In situ optical switching of the current flowing through a DAE monolayer assembled in a PEDOT PSS interlayer-based LAJ. (a) Comparison of the current densities flowing through as assembled open and closed isomer and upon in-situ photoisomerization.

FIGURE 1.4 Optical transmission spectra of (a) PEDOT-PSS and (b) PANI-CSA. 

Conducting polymers such as PEDOT PSS, doped polyaniline or polypyrrole, and... 

Conducting Polymers, PEDOT-PSS, Doped Polyaniline and Polypyrrole... 

HOMO energy level of the polymer is 5.32 eV. It was demonstrated that the EL performance of super yellow PPV and blue polyfluorene derivatives using this hole transport polymer is comparable to or better than that using PEDOT PSS as a HTL [102],... 

Same as arylamine DSA derivatives used as guest materials in blue OLEDs, Geise et al. synthesized a series of alkyloxy-substituted biphenyl vinyl compounds as dopant materials [236]. These authors studied OLEDs fabricated using PVK as a host polymer and holetransporting PBD as a codopant with a PLED structure of ITO/PEDOT-PSS/PVK 230VBP PBD/LiF/Al, which gave an optimized QE of 0.7% and brightness of 1600 cd/m2 at 100 mA/cm2 with emission peak at 450 nm. 

The impedance of PLEDs can be viewed in many different formats G-B, R-X, or as a function of frequency (see Figure 10.6). The diode in this example was ITO/PEDOT PSS/Alkoxy-PPV/Ca/Al, measured from 102 to 107Hz, with forward bias from 0 to 5 V. 

Fig. 4.14 (a) Optical transmittance of graphene on a polyethylene terephthalate (PET) flexible substrate [19]. Optical and electrical data for PEDOT PSS-based composites with SWCNT (b) transmittance at 550 nm, (c) sheet resistance, (d) DC conductivity and (e) ratio of DC to optical conductivity. 

Figure 2.31 Effect of film thickness on the absorbance response of a PXV/PEDOT PSS films bearing (a) 20 (b) 30 (c) 40 (d) 50 and (e) 60 bilayers. Square-wave potential between 0.5 V and —0.9 V and a period of 20s was employed. Taken from [196].

In the context of this chapter, we focus on the undoped or lightly doped 7i-conjugated systems that are commonly referred to as organic semiconductors. Conducting polymers, such as PEDOT PSS, plexcore, polyaniline, polypyrrole, and others are not addressed here as their charge transfer mechanisms are rather different and would warrant an article in its own right. 

Lee HJ, Lee J, Park S-M (2010) Electrochemistry of conductive polymers. 45. Nanoscale conductivity of PEDOT and PEDOT PSS composite films studied by current-sensing AFM. J Phys Chem B 114 2660... 

Yin B, Liu Q, Yang L et al (2010) Buffer layer of PEDOT PSS/graphene composite for polymer solar cells. J Nanosci Nanotechnol 10 1934-1938... 

Wang G, Yoo H, Na SI, Kim TW, Cho B, Kim DY, Lee T (2009) Electrical conduction through self-assembled monolayers in molecular junctions Au/molecules/Au versus Au/ molecule/PEDOT PSS/Au. Thin Solid Films 518(2) 824-828... 

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