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Battelle Memorial Institute

Battelle Institute E.v.

Gert Hewig

Jorg Worner

Bernd Schurich

Hans Huschka

Alan L Harmer

Daniel M Gross

Hans-Werner Schock

Dieter Bonnet

Erich Reinhardt

Fritz Pfisterer

Gerhard Bilger

Ralf Dornhaus

Gerhard Laub

Josef Ehrhardt

Werner H Bloss

Method of producing an absorber layer for solar cells with the aid of

An active flat-design video screen is described, having signal line means arranged in lines and columns, these signal line means, at their crossing points, defining picture elements of the video screen, in which case the lines that are arranged in columns are developed as electrodes and the signal line means that are arranged in lines are developed by means of optical waveguides into which, on the input side, a modulated light signal is coupled and which, at each crossing point, have a device for the coupling-out of the respective light signal. In comparison to conventional active flat-design video screens, the video screen according to the invention distinguishes itself particularly by a good picture resolution and a good contrast range, connected with a good regeneration rate.

Active flat-design video screen

In order to provide an uncomplicated and economical front surface contact for photovoltaic cells (10) with good current discharge capability and high radiation permeability, the front surface contact (20) is composed of several layer (22, 24, 26) which are essentially unaligned with respect each other. The layers (22, 24, 26) are composed of different materials, which guarantes good ohmic coupling to the light incident semiconductor layer, good collection of free charge carriers in the semiconductor layer, and good discharge of same to a load device.

Photovoltaic cell and method for its fabrication

A contact system for thin film solar cells, which guarantees that charge carrier transport without a barrier layer takes place from the semiconductor layer facing the light source to the front contact in such a manner that, among others, long term negative influences by the front contact on the semiconductor layer will not take place. To this end the front contact is rendered passive against the semiconductor layer by modifying its chemical potential, at least in the actual contact area, to be matched to the chemical potential of the semiconductor layer, or by forming a chemically inert system acting as a reaction barrier between the front contact and the semiconductor layer.

Contact system for thin film solar cells

A method to prevent short-circuits or shunts in a large area thin film solar cell comprises applying, to a substrate with a first conductive electrical contact, at least one first layer comprising a p-type or n-type conductive layer and a second layer comprising an n-type or p-type conductive layer or a Schottky barrier layer. The second layer, in turn, is provided with a second conductive electrical contact. Those areas of the first conductive electrical contact which are effectively uncovered by the first layer are passivated after forming the first layer and before application of the second layer.

Method for preventing short-circuits or shunts in a large area thin film

A solar cell arrangement with an associated optical collecting lens system. The lens system focuses a light impingement area onto the solar cell to intensify incident radiation. The collecting lens system includes an optically active layer provided between the light impingement area and the solar cells. The optically active layer images and disperses the incident light in a manner adapted to the surface and light absorption characteristics of the solar cells.

Solar cell arrangement

A method for the production of solar cells with a thin-layer PN heterojunction, having a cadmium sulfide layer vapor deposited on an electrically conductive support and a cuprous sulfide layer chemically produced on the cadmium sulfide layer, and having an electrically conductive grid in contact with the cuprous sulfide layer, wherein the two layers and the conductive support are formed into one structural part, and the conductive grid is formed into a second structural part including a covering glass member, and the two structural parts are adhesively joined to form a closed encapsulated cell.

Method for production of solar cells and solar cells produced thereby

Growing community of inventors

Alzenau, Germany

Gert Hewig