PEDOT based polyelectrolyte complexes are widely used as hole injection layers in OLEDs. They are available with high and low work functions. A new polystyrenesulfonic acid free water based complex has been developed that offers easy processing. Due to its high stability it gives rise to efficient and long living devices.Small molecule semiconductors can exhibit high charge carrier mobilities due to their high crystallinity. Oligomeric semiconductor materials with mobilities >3 cm 2 /Vs have been synthesized using the benzothienobenzothiophene (BTBT) core.
The concept of self-asssembling monolayer formation of organic semiconductors using highly reactive chlorosilane linker groups has been extended to the phosphonic acid linker which can be handled in air. A first proof of concept using an oxidized Al-gate electrode to form a hybrid thin dielectric resulted in a low voltage field effect transistor with hole mobilities of 10 -5 cm 2 /Vs.PEDOT based hole-transport and conductive materials have been improved for use in organic photovoltaics and wide area devices that require Ag busbars. A novel etchant can provide an invisible pattern for conductive transparent electrodes comprised of Clevios™ PEDOT:PSS.
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