University of California

N S Sariciftci

Alan J Heeger

Benjamin R Mattes

Victor I Klimov

Jan Cornelis Hummelen

Duncan W McBranch

Jeanne M Robinson

Aaron C Koskelo

Myoungsik Cha

Laura B Smilowitz

Optical limiting materials. Methanofullerenes, fulleroids and/or other fullerenes chemically altered for enhanced solubility, in liquid solution, and in solid blends with transparent glass (SiO.sub.2) gels or polymers, or semiconducting (conjugated) polymers, are shown to be useful as optical limiters (optical surge protectors). The nonlinear absorption is tunable such that the energy transmitted through such blends saturates at high input energy per pulse over a wide range of wavelengths from 400-1100 nm by selecting the host material for its absorption wavelength and ability to transfer the absorbed energy into the optical limiting composition dissolved therein. This phenomenon should be generalizable to other compositions than substituted fullerenes.

Optical limiting materials

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

Conjugated polymer-acceptor heterojunctions; diodes, photodiodes, and

Conjugated polymer - acceptor heterojunctions; diodes, photodiodes, and

Growing community of inventors

Santa Barbara, CA, United States of America

N S Sariciftci