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Proceedings Paper

Nonlinear absorption in charge-transfer films
Author(s): Myoungsik Cha; Niyazi Serdar Sariciftci; Alan J. Heeger; Jan C. Hummelen; Fred Wudl
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Paper Abstract

Nonlinear optical absorption in solid films of poly(3-octyl thiophene) (P3OT) sensitized with methanofullerene was investigated for wavelengths from 620 to 960 nm. The nonlinear absorption is enhanced over that in either of the component materials by more than two orders of magnitude at 760 nm. The large nonlinearity results from efficient photoinduced intermolecular charge transfer from P3OT to methanofullerene, followed by absorption in the charge separated excited state. P3OT/fullerene films are promising as optical limiters; the transmission clamps at an average fluence of approximately 0.1 J/cm2.

Paper Details

Date Published: 8 December 1995
PDF: 6 pages
Proc. SPIE 2530, Fullerenes and Photonics II, (8 December 1995); doi: 10.1117/12.228121
Show Author Affiliations
Myoungsik Cha, Univ. of California/Santa Barbara (United States)
Niyazi Serdar Sariciftci, Univ. of California/Santa Barbara (United States)
Alan J. Heeger, Univ. of California/Santa Barbara (United States)
Jan C. Hummelen, Univ. of California/Santa Barbara (United States)
Fred Wudl, Univ. of California/Santa Barbara (United States)


Published in SPIE Proceedings Vol. 2530:
Fullerenes and Photonics II
Zakya H. Kafafi, Editor(s)

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