Light trapping, a new approach to spectrum splitting (2008)
Goetzberger, A, Goldschmidt, J.C., Peters, M., Löper, P.
In this paper, a novel type of light trap is introduced. It enables photovoltaic conversion with separate solar cells optimized for different frequency bands, which are covered by spectrally...
STRUCTURAL IMPERFECTIONS IN SILICON P-N JUNCTIONS. (2006)
Investigations of imperfections in pn junctions continued. The avalanche effect and its rela tionship to imperfections was studied. Diffu sion technology suitable for the achievement of uniform...
RESEARCH AND INVESTIGATION OF INVERSE EPITAXIAL UHF POWER TRANSISTORS. (2005)
Goetzberger,A., Scarlett,R. M.
The report describes development work toward a 10 watt 500 Mc silicon npn epitaxial transistor. An extensive design theory permits calculation of important material and geometrical parameters to...
THIN COMPOSITIONAL LAYERS IN SILICON (2005)
Research is reported in three major sections. Part I deals with diffusion, with emphasis on the techniques of preparation and the properties of thin diffused layers. The multiple predeposit technique...
Goetzberger, A., Kuckelkorn, T.
EP 1201986 A UPAB: 20020725 NOVELTY - The light deflection and shading device has optical elements (C) arranged adjacent to each other in a row or in an array so that the light output sides (D) of...
Verfahren und Vorrichtung zur grossflaechigen Herstellung von Solarzellen (2004)
DE 10311893 B UPAB: 20041112 NOVELTY - Production of a silicon thin layer solar cell comprises treating the casing surface of a cylindrical silicon crystal (1) to form a boundary layer (4) and...
Müller, M., Goetzberger, A., Goller, M.
Üblicherweise sind optische Linsen so ausgelegt, daß sie Strahlung, die senkrecht zur Linsenebene einfällt, optimal konzentrieren. Die konzentrierende Wirkung nimmt für andere Einfallswinkel der...
Photovoltaic materials. History, status and outlook (2003)
Goetzberger, A., Hebling, C., Schock, H.W.
The paper reviews the history, the present status and possible future developments of photovoltaic (PV) materials for terrestrial applications. After a brief history and introduction of the...
Vorrichtung zur Lichtumlenkung zur Beleuchtung eines Innenraumes (2003)
Goetzberger, A., Kuckelkorn, T.
EP 1201872 A UPAB: 20020730 NOVELTY - The device has a translucent optical element(s) with a flat input side and an output side bounded by a first curved surface and at least a second surface. Light...
Müller, M., Goetzberger, A., Goller, M.
Üblicherweise sind optische Linsen so ausgelegt, daß sie Strahlung, die senkrecht zur Linsenebene einfällt, optimal konzentrieren. Die konzentrierende Wirkung nimmt für andere Einfallswinkel der...
Dynamic Properties of Interface States in MOS-Structures. (2002)
Goetzberger,A., Klausmann,E., Schulz,M. J.
The dynamic properties of impurities implanted into the interface of MOS structures are investigated. Interface state density, trapping time constants and capture cross sections are measured....
Dynamic Properties of Interface States in MOS-Structures. (2002)
Within this project details of the dynamic properties of impurities implanted into the interface of MOS structures are investigated. Interface state density, trapping time constants and capture cross...
Dynamic Properties of Interface States in MOS-Structures. (2002)
With the CC-DLTS (= constant capacitance deep level transient spectroscopy) method the energy distribution of the interface state density and the capture cross sections of MOS structures can be...
Goetzberger, A., Goller, M., Mueller, M.
DE 10125273 A UPAB: 20030214 NOVELTY - The device has a structured front (E) with optically active parts (A) for imaging with the light passing through the element, optically inactive parts (B) for...
Stationaere Einrichtung zur Abschattung des direkten Sonnenlichts bei Verglasungen (2002)
The apparatus includes a light concentrating structure with a transparent medium which deflects direct and diffuse light. The light emanates from a defined region of the sky, e.g. southern direction,...
The glass has a transparent panel with lens structures (3) on the surface which faces the sun. The focal plane of the lens structures lies as far as possible behind the panel. A flat layer of a...
Anordnung fuer Lichtleitsystem (2000)
The arrangement comprises several trough-shaped parabolic concentrators (3,4,8), filled with a light-refracting medium. The longitudinal axis of the trough is aligned parallel to the direction of the...
Goetzberger, A., Müller, M., Goller, M.
A static, non-mechanical, self-activating sun protection system affecting the direct sunlight but not the diffuse skylight is described. It is based on the selection of direct sunlight by...
STRUCTURAL IMPERFECTIONS IN SILICON P-N JUNCTIONS (1998)
Four areas of investigation were completed. A study was made of a technique for measurement of the depth of diffused layers in silicon by a grooving method reported here in detail for the first time....
The self-sufficient solar house in Freiburg - results of three years of operation (1996)
Voss, K., Goetzberger, A., Bopp, G., Häberle, A., Heinzel, A., Lehmberg, H.
Fassadenelement zur passiven Gebaeudeheizung, bestehend aus einer transparenten Abdichtung und einem transparenten Waermedaemmaterial und einer Schicht aus einem Material mit temperaturabhaengiger...
The self-sufficient solar house Freiburg. Results of three years of operation (1995)
Voss, K., Goetzberger, A., Bopp, G., Häberle, A., Heinzel, A., Lehmberg, H.
The Self-Sufficient Solar House Freiburg - Results of three Years of Operation. (1995)
Voss, K., Goetzberger, A., Bopp, G., Häberle, A., Heinzel, A., Lehmberg, H.
Zweistufige Konzentratoranordnung mit mehreren Solarzellen (1994)
The invention relates to a two-stage tracked concentrator arrangement comprising several solar cells for concentrating solar radiation onto the solar cells, whereby the arrangement is tracked along a...
Verwendung eines Solarmoduls (1994)
The invention relates to a solar module having a transparent cover under which is located a solar cell. To achieve better efficiency, the invention proposes to provide the outer surface of the cover...
The invention relates to a solar energy conversion appliance for the simultaneous recovery of electrical and thermal energy, said appliance consisting of a device for optically concentrating...
The self-sufficient solar house Freiburg: experience along the way to energy independance (1994)
Voss, K., Dohlen, K. Von, Lehmberg, H., Stahl, W., Wittwer, C., Goetzberger, A.
Das energieautarke Solarhaus Freiburg: Erfahrungen auf dem Weg zur Energieautarkie (1994)
Voss, K., Dohlen, K. Von, Lehmberg, H., Stahl, W., Wittwer, C., Goetzberger, A.
Anordnung zur Umwandlung von Sonnenenergie (1994)
The invention relates to an arrangement for converting solar energy into electrical and/or thermal energy whereby a surface-covering arrangement of flat solar collectors is provided, above which is a...
The self-sufficient solar house Freiburg - first results (1993)
Stahl, W., Voss, K., Goetzberger, A.
The construction of the Self-Sufficient Solar House (SSSH) in Freiburg was completed in October 1992. Since that time the building is occupied by a 3 person family. The results of the first heating...
Das energieautarke Solarhaus (1993)
Voss, K., Stahl, W., Goetzberger, A.
All the energy needed by a single family home in the Central European climatic zone can be provided by the solar energy incident on the building's exterior during a year. The pre-conditions are...
Das Energieautarke Solarhaus - erste Ergebnisse von Funktion und Betrieb (1993)
Stahl, W., Voss, K., Goetzberger, A.
The construction of the Self-Sufficient Solar House (SSSH) in Freiburg was completed in October 1992. Since that time the building is occupied by a 3 person family. The results of the first heating...
In diesem Beitrag gebe ich zunächst einen höchst subjektiven Eindruck von den Vorgängen in Rio, wo ich eine Woche als Beobachter war. Dann gehe ich auf die von der ISES erarbeiteten Empfehlungen...
Transparent insulation of building facades - steps from research to commercial applications (1992)
Braun, P.O., Schmid, J., Stahl, W., Goetzberger, A.
Transparent insulation materials (TIM) represent a class of new materials for application in solar thermal conversion systems. A U-value below 1 W/(qmK) and an energy transmittance greater than 70%...
Bei dem Solarzellenmodul sind mehrere beidseitig wirksame Solarzellen (2 bis 10) vorgesehen, die ueber einer Anordnung aus mehreren parallel zueinander verlaufenden rinnenfoermigen Spiegeln (13)...
A new transparently insulated, bifacially irradiated solar flat-plate collector (1992)
Dengler, J., Rommel, M., Göttsche, J., Wittwer, V., Goetzberger, A.
A new type of transparently insulated flat-plate collector was developed. It reaches higher efficiencies at low irradiation values or high operating temperatures than any other collector type known....
Low-cost TI curtain device (1992)
Within the framework of the passive solar energy research performed at the Fraunhofer Institute for Solar Energy Systems, a transparently insulated device, constructed with a double-sheet design, was...
Das energieautarke Solarhaus Freiburg (1992)
Stahl, W., Voss, K., Goetzberger, A.
Das Fraunhofer-Institut für Solare Energiesysteme (ISE) plant und baut ein vollständig energieautarkes Einfamilienwohnhaus in Freiburg. Der gesamte Energiebedarf für Heizung, Elektrizität und...
Einsatz hocheffizienter Flachkollektoren in Mitteleuropa für solare Kraft-Wärme-Kopplung (1992)
Using Transparent Insulation Material (TIM) in the construction of a bifacial flat collector resulted in a highly efficient collector with a better efficiency for low radiations and high temperatures...
Abrollbares, transparentes Isolationselement für Fassaden (1992)
Im Rahmen der Arbeiten zur passiven Solarenergienutzung entwickelt das Fraunhofer-Institut für Solare Energiesysteme (FhG-ISE) ein auf einer Doppelfolie basierendes transparentes Isolationselement...
The self-sufficient solar house Freiburg (1991)
The Fraunhofer-Institute for Solar Energy Systems is planning and building a completely selfsufficient solar one-family house in Freiburg, Germany. The entire energy demand for heating, electricity...
Reduction of reflection losses by structured surfaces of solar cells (1991)
Scheydecker, A., Goetzberger, A., Wittwer, V.
Structuring the transparent cover of solar cell modules reduces reflection losses particularly at large angles of incidence. Relevant aspects are good transmission efficiency independent of...
Ein Kollektor-Speicher (1) zum Einbau zwischen Dachsparren (19, 20) eines Daches verfuegt ueber einen zylindrischen Druckbehaelter (2), der zwischen den Dachsparren (19, 20) angeordnet ist, und...
Flat plate collector with bifacially irradiated absorber (1991)
Dengler, J., Goetzberger, A., Rommel, M., Wittwer, V.
A new flat plate collector has been developed which, especially during times of low radiation conditions, reaches higher efficiencies than any other collector known so far. The absorber plate is...
Das energieautarke Solarhaus (1991)
Bopp, G., Heinzel, A., Sick, F., Stahl, W., Goetzberger, A.
Das Fraunhofer-Institut für Solare Energiesysteme plant im Rahmen eines BMFT-Projektes zur Zeit den Bau eines energieautarken Solarhauses, das vollständig von Sonnenenergie versorgt wird. Die...
Eine solarbetriebene elektronische Uhr verfuegt ueber eine Anzeigeeinrichtung (4), eine Elektronik (1, 2), einen elektrischen Speicher (6) und eine Solarzellenanordnung (7). Der von der...
Einrichtung zum insbesondere nachtraeglichen Waermeschutz von Kellern in Gebaeuden (1991)
Einrichtung zum insbesondere nachtraeglichen Waermeschutz von Kellern in Gebaeuden, wobei auf das zu isolierende Bauteil eine Folie mit geringer Infrarotemissivitaet aufgebracht ist.
Efficiency of a combined solar concentrator cell and thermal power engine system (1991)
Bronner, W., Goetzberger, A., Wettling, W.
The combination of a concentrator solar cell and a thermal power engine is investigated theoretically. The excess heat of the PV concentrator cell can be used to drive a thermal power engine such...
The bifacial absorber collector - a new highly efficient flat plate collector (1991)
Goetzberger, A., Rommel, M., Wittwer, V.
A new flat plate collector has been developed which, especially during times of low radiation conditions, reaches higher efficiencies than any other collector known so far. The absorber plate is...
Vorrichtung zur Klimatisierung eines Gebaeudes (1990)
Goetzberger, A., Schmid, J., Stahl, W., Wittwer, V.
Die Erfindung betrifft einen Fassadenkollektor fuer die Klimatisierung der Gebaeudeaussenflaechen mit Hilfe der Solarstrahlung. Die Gebaeudeaussenflaeche wird als Kollektor ausgebildet, so dass...
Solar collector to convert solar radiation, whereby the collector can be irradiated on both sides and is configured via a setup of several groove-shaped mirrors running in parallel to each other and...
Integrated collector storage (ICS) systems, consisting of a pressure-resistant single tube absorber in front of an involute reflector and covered by highly transparent insulation material, have been...
Kombinierter Wirkungsgrad von PV-Konzentratorzelle und Wärmekraftmaschine (1990)
The excess heat of a photovoltaic concentrator cell can be used to drive a thermal power engine (as e.g. a Stirling motor) such that the thermal engine is an active cooling device for the solar cell....
Das energieautarke Solarhaus. Entwicklung des Fraunhofer-Instituts für Solare Energiesysteme (1990)
Durch den Bau dieses Solarhauses soll gezeigt werden, daß durch rationelle Energieverwendung und konsequente Nutzung der auf die Gebäudehülle auftreffenden Sonnenstrahlung es möglich ist, ohne...
Das energieautarke Solarhaus (1990)
Transparent insulation and Hydrogen/Oxygen technology will show new possibilities for solar energy utilization in the project "Self-Sufficient Solar House". Wthout recourse to conventional energy...
Development in silicon sheet technologies (1990)
With a growing market for solar cell materials high volume growth techniques may replace the current Czochralski and the casting technique for silicon which are limited by the cutting of ingots into...
Two stage stationary concentrator - numerical simulation of prototype concentrators (1989)
In a previous paper (1) the concept of a stationary concentrator with optimized concentration ratio was proposed. It consists of a first stage, linear CPC and a second two dimensional stage (Fig. 1)....
Transparent insulation - a new solar energy component (1989)
A survey of the recent history, present status and future outlook of Transparent Insulation Materials (TIM) is given. A number of different generic types of transparent insulation materials are...
Progress in non-czochralski growth of silicon for solar cells (1989)
With a growing market for solar cell materials cost effective non-Czochralski techniques for the crystallization of silicon may become more important. Casting techniques are now dominant but...
Physics and applications of transparent insulation materials (1989)
Transparent or translucent insulation materials (TIM's) represent a new class of materials with a high potential for increasing the efficiency of solar thermal conversion systems. A large number of...
Lichtdurchlässiges energiegewinnendes Isoliersystem (1989)
Bertsch, K., Boy, E., Gertis, K., Goetzberger, A., Schmid, J., Wittwer, V.
A concentrator configuration (10) consists of a panel (11) to which is coupled a large number of first steps arranged in parallel to each other having parabolic side walls (2, 3). The first steps...
Vorrichtung zum solaren Beheizen der Aussenwand eines Gebaeudes (1988)
Eine Vorrichtung zum solaren Beheizen der Aussenwand eines Gebaeudes verfuegt ueber ein Rollo (2) mit einer lichtabsorbierenden Folie (3) und einer transparenten Folie (4), zwischen denen ein...
Thermal energy collector and storage with radiatively heated walls (1988)
Goetzberger, A., Rommel, M., Wittwer, V.
Experimental results of a small storage cube with transparently insulated walls are given. In 1986 the storage was insulated with silica aerogel pellets, in 1987 with a honeycomb structure from...
Schmidt, C., Goetzberger, A., Schmid, J.
Transparent Insulation Material (TIM) has been used in integrated collector storage (ICS) prototypes developed at the Fraunhofer Institut für Solare Energiesysteme (ISE). Two prototypes (1st...
Schmidt, C., Goetzberger, A., Schmid, J.
Two integrated collector storage (ICS) prototypes with about 1 qm absorber surface each have been installed and investigated at the Institut für Solare Energiesysteme (ISE). Each consists of a water...
Static concentration systems with enhanced light concentration (1988)
Very high efficiencies have recently been achieved with Si solar cells in the laboratory. This paper presents new concepts for static concentration leading to significantly reduced solar cell area...
Self-sufficient solar house 2000 (1988)
The concept of a building totally independent of any other energy source than solar radiation is presently being developed at our institute. Thermal conversion of solar energy by means of...
Lichtdurchlässiges energiegewinnendes Isoliersystem zur Einsparung von Heizenergie (1988)
Bertsch, K., Boy, E., Goetzberger, A., Schmid, J., Wittwer, V.
Integrated collector storage systems with highly transparent, highly insulating cover (1988)
Schmidt, C., Goetzberger, A., Schmid, J.
Two integrated collector storage (ICS) prototypes with about 1 squaremeter absorber surface each have been installed and investigated at the Institut für Solare Energiesysteme (ISE). Each consists...
Development in silicon sheet technologies (1988)
The current status of the development of techniques for the production of sheets/ribbons/foils of silicon for solar cells is reviewed. Of the numerous early approaches only a few survived the last...
Demonstration of passive energy by the use of roller blinds (1987)
Bopp, G., Lottermoser, J., Luther, G., Quack, F., Goetzberger, A., Schmid, J.
Transparent insulation system for passive solar utilization in buildings (1984)
Schmid, J., Wittwer, V., Platzer, W., Stahl, W., Goetzberger, A.
Autonomer Heizkoerperthermostat (1984)
Die Erfindung betrifft einen Heizkoerperthermostat fuer Tagbetrieb und Nachtabsenkung, wobei eine Steuer- und Antriebseinheit zur Temperatursollwerteinstellung vorgesehen ist.
Improvement of efficiency and stability of fluorescent planar concentrators (FPCs) (1983)
Goetzberger, A., Heidler, K., Zastrow, A., Wittwer, V., Wilson, H.R.
Fraunhofer-Institut für Solare Energiesysteme. Tätigkeitsbericht 1982 (1982)
Das zum 1.7.1981 gegruendete Forschungsinstitut legt mit seinem 2. Taetigkeitsbericht die wissenschaftlich-technischen Ergebnisse und weiteren Aktivitaeten einem breiten Kreis von Interessenten vor....
Solarzelle aus polykristallinem Grundmaterial mit strukturierter Oberflaeche (1982)
Die Erfindung betrifft ein Halbleiterbauelement fuer Solarzellen aus polykristallinem Material. An den Korngrenzen sind scheibenfoermige Halbleiterkoerper eingekerbt oder abgerundet, damit die...
On the conversion of solar radiation with fluorescent planar concentrators (1980)
Sah, R.E., Goetzberger, A., Heidler, K., Zastrow, A., Wittwer, V.