Organic Dipole Layers for Ultralow Work Function Electrodes

Work function change of platinum electrodes induced by halide ad-

8 The properties of a halogen-covered platinum (111) surface have been studied using density func9 tional theory (DFT) as halides are often present at electrochemical electrode/electrolyte interfaces. 10 We focused in particular on the halogen-induced work function change as a function of coverage 11 of fluorine, chlorine, bromine and iodine. For electronegative adsorbates, an adsorption-induce...

Graphene as transparent conducting electrodes in organic photovoltaics: studies in graphene morphology, hole transporting layers, and counter electrodes.

In this work, organic photovoltaics (OPV) with graphene electrodes are constructed where the effect of graphene morphology, hole transporting layers (HTL), and counter electrodes are presented. Instead of the conventional poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) PEDOT:PSS HTL, an alternative transition metal oxide HTL (molybdenum oxide (MoO(3))) is investigated to address the iss...

Ultralow reflection from a-Si nanograss/Si nanofrustum double layers.

A double-layer nanostructure comprising amorphous Si nanograss on top of Si nanofrustums (NFs) with a total height of 680 nm exhibits ultralow reflection. Almost near-unity absorption and near-zero reflectance result in this layered nanostructure, over a broad range of wavelengths and a wide range of angles of incidence, due to the low packing density of a-Si and the smooth transition of the re...

Organic epitaxial layers on organic substrates

Work Function Adjustment by Using Dipole Engineering for TaN-Al2O3-Si3N4-HfSiOx-Silicon Nonvolatile Memory

This paper presents a novel TaN-Al₂O₃-HfSiOx-SiO₂-silicon (TAHOS) nonvolatile memory (NVM) design with dipole engineering at the HfSiOx/SiO₂ interface. The threshold voltage shift achieved by using dipole engineering could enable work function adjustment for NVM devices. The dipole layer at the tunnel oxide-charge storage layer interface increases the programming speed and provides satisfactory...