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Donald Lupo, Josef Salbeck, Hermann Schenk, Thomas Stehlin, Roland Stern, Arno Wolf: Spiro compounds and their use as electroluminescence materials. Hoechst Aktiengesellschaft, Frommer Lawrence & Haug, November 24, 1998: US05840217 (130 worldwide citation)

Use of spiro compounds of the formula (I) ##STR1## where K.sup.1 and K.sup.2 are, independently of one another, conjugated systems, in electroluminescence devices.


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Willi Kreuder, Donald Lupo, Josef Salbeck, Hermann Schenk, Thomas Stehlin: Conjugated polymers having spiro centers and their use as electroluminescence materials. Hoechst Aktiengesellschaft, Curtis Morris & Safford, April 15, 1997: US05621131 (126 worldwide citation)

Conjugated polymers comprising recurring units of the formula (I), ##STR1## A, B, C, D are identical or different and are each from one to fifteen identical or different arylene and/or heteroarylene and/or vinylene groups which, like the spirobifluorene skeleton itself, may be unsubstituted or subst ...


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Donald Lupo, Josef Salbeck: Photovoltaic cell. Hoechst Aktiengesellschaft, Frommer Lawrence & Haug, March 23, 1999: US05885368 (43 worldwide citation)

A photovoltaic cell having a charge transport layer comprising a hole conductor material is disclosed and claimed. The photovoltaic cell comprising a light absorbing layer having a semiconductor material with a bassed gap of at least 3.0 Ev, the surface of the semiconductor having a roughness of >20 ...


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Udo Bach, Michael Grätzel, Josef Salbeck, Frank Weissörtel, Donald Lupo: Photovoltaic cell. Aventis Research & Technologies & Co, Frommer Lawrence & Haug, January 1, 2002: US06335480 (32 worldwide citation)

A photovoltaic cell comprising an electrolyte which comprises a hole conductor compound as redox system.


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Donald Lupo, Akio Yasuda, Gabrielle Nelles: Electronic device comprising a columnar discotic phase. Sony International, William S Frommer, Mark W Russell, Frommer Lawrence & Haug, August 28, 2001: US06281430 (25 worldwide citation)

An electronic device comprising two adjacent regions of materials with different electric properties is characterized in that one of the regions is formed by a columnar structure of a discotic liquid crystal material, said structure having interspaces defined between columns of said discotic liquid ...


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Willi Kreuder, Donald Lupo, Josef Salbeck, Hermann Schenk, Thomas Stehlin: Conjugated polymers containing heterospiro atoms and their use as electroluminescence materials. Hoechst Aktiengesellschaft, Frommer Lawrence & Haug, January 12, 1999: US05859211 (11 worldwide citation)

A conjugated polymer comprising repeating units of the formula (I), ##STR1## where the symbols and indices have the following meanings: .PSI. is an element of the 4th main group of the Periodic Table with the exception of carbon;


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Andre Laschewsky, Helmut Ringsdorf, Werner Interthal, Donald Lupo, Werner Prass, Ude Sheunemann: Film comprising unimolecular layers. Hoechst Aktiengesellschaft, November 13, 1990: US04970120 (10 worldwide citation)

Film comprising at least one unimolecular layer. A film for use in nonlinear optics comprises at least one Langmuir-Blodgett layer, the layer containing or comprising a dye of the formula ##STR1## in which R.sup.1 denotes a long-chain alkoxy, acyloxy, alkylamino or acylamino group. In particular whe ...