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United States Patent 5,454,880
Sariciftci, et. al.Oct. 3, 1995

Conjugated polymer-acceptor heterojunctions; diodes, photodiodes, and photovoltaic cells

Inventors: Sariciftci; N. S. (Santa Barbara, CA); Heeger; Alan J. (Santa Barbara, CA).
Assignee: Regents of the University of California (Oakland, CA).
Appl. No.: 180,909
Filed: Jan. 12, 1994

Related U.S. Application Data
Continuation of (including streamline cont.) Ser. No.930,161, Aug. 17, 1992, Pat. No. 5,331,183.
Intl. Cl.:H01L 31/06; H01L 31/0256; H01L 31/0392
U.S. Cl.:136/263; 257/ 40; 257/184; 257/461
Field of Search:136/263; 257/40, 184, 461

References Cited

U.S. Patent Documents
5,009,958Apr., 1991Yamashita et al. 428/411.1
5,171,373Dec., 1992Hebard et al. 136/252
5,185,208Feb., 1993Yamashita et al. 428/411.1

Foreign Patent Documents
60-149177Aug., 1985JP 136/263

Other References

Primary Examiner: Weisstuch; Aaron
Attorney, Agent or Firm: Morrison & Foerster


This invention relates generally to the fabrication of heterojunction diodes from semiconducting (conjugated) polymers and acceptors such as, for example, fullerenes, particularly Buckminsterfullerenes, C(60), and more particularly to the use of such heterojunction structures as photodiodes and as photovoltaic cells.

14 Claims, 16 Drawing Figures


This invention was made in part with Government support under contract number N-00014-91-J-1235 awarded by the Office of Naval Research. The Government has certain rights in this invention.

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