International Business Machines Corporation

Egypt Nanotechnology Center

Egypt Nanotechnology Center (Egnc)

Osama Tobail

Devendra K Sadana

Jeehwan Kim

George Stojan Tulevski

Ahmed Abou-Kandil

Mohamed Saad

Keith E Fogel

Mostafa M El-Ashry

Hisham S Mohamed

Paul Michael Kozlowski

A Schottky-barrier-reducing layer is provided between a p-doped semiconductor layer and a transparent conductive material layer of a photovoltaic device. The Schottky-barrier-reducing layer can be a conductive material layer having a work function that is greater than the work function of the transparent conductive material layer. The conductive material layer can be a carbon-material layer such as a carbon nanotube layer or a graphene layer. Alternately, the conductive material layer can be another transparent conductive material layer having a greater work function than the transparent conductive material layer. The reduction of the Schottky barrier reduces the contact resistance across the transparent material layer and the p-doped semiconductor layer, thereby reducing the series resistance and increasing the efficiency of the photovoltaic device.

Photovoltaic devices with an interfacial band-gap modifying structure and methods for forming the same

An electrode includes a conductive substrate and a plurality of conductive structures providing a compressible matrix of material. An active material is formed in contact with the plurality of conductive structures. The active material includes a volumetrically expanding material which expands during ion diffusion such that the plurality of conductive structures provides support for the active material and compensates for volumetric expansion of the active material to prevent damage to the active material.

Composite anode structure for high energy density lithium-ion batteries

A hydrogenated thin film is formed in a controlled vacuum on a substrate by evaporating one or more solid materials and passing the resulting vapor and a hydrogen-containing gas into a space between two electrodes. One of the electrodes includes openings for allowing the vapor to enter the space. Plasma is generated within the space to cause dissociation of the hydrogen-containing gas and promote a reaction between the material(s) and hydrogen-containing gas.

Deposition of hydrogenated thin film

Growing community of inventors

Elmsford, NY, United States of America

Osama Tobail