PHOTOCURRENT GENERATION FROM A SELF-ASSEMBLING GUEST-HOST LB FILM OF C-60(HOOC(C)UNDER-BARHNH(C)UNDER-BARHCOOH) AND OCTOPENTYLOXY PHTHALOCYANINE

The photoelectric properties of a guest-host system of C-60(HOOC (C) u nder bar HNH (C) under bar HCOOH) (C(60)AAD) and 2,3,11,12,20,21,29,30 -octopentyloxy phthalocyanine (Pc(OR)(8), R = C5H11) were studied. The evident change of pi-A isotherms and the blue-shift of UV-vis spectra showed that C(60)AAD molecules were incorporated into the cavities of Pc(OR)(8) to form a host-guest Langmuir film at air-water interface. The mixed film could be deposited onto solid substrates with transfer ratio of about 1.05 +/- 0.05 at 15 mN m(-1). The photoelectrochemical investigation of the mixed LB film on ITO electrodes was carried out. Results showed that electrons flow from the ITO through the mixed LB f ilm to the electrolyte. Positive bias voltage, electron acceptor and o xygen were the beneficial factors for energy conversion. The external quantum yield was up to 3.5-4.0% (e/photon) without any bias voltage. (C) 1998 Published by Elsevier Science Ltd.