The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 1999
Filed:
Sep. 11, 1996
Applicant:
Inventors:
Donald Lupo, Frankfurt, DE;
Josef Salbeck, Kelkheim, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
136263 ; 136255 ; 429111 ; 257 40 ; 257 43 ;
Abstract
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, optionally a sensitizer layer, a charge transport layer comprising one or more spiro compounds of the formula (I) as a hole conductor material ##STR1## where .PSI. is C, Si, Ge or Sn, and