FULLERENE PHOTOELECTROCHEMICAL SOLAR-CELLS

The photoelectrochemistry of single crystal C-60 and fullerene photoel ectrochemical solar cells is studied. Illuminated and immersed, C-60 i s shown to drive oxidation of several solution-phase redox couples. Ut ilization of a photoelectrochemical solid/liquid junction, rather than solid-state photovoltaic junction, improves the observed photocurrent . Utilization of a single crystal, rather than a polycrystalline him, of C-60 decreases dark current to the extent that light-driven charge transfer dominates. The spectral response and current-voltage behaviou r in several electrolytes is studied. A low-power fullerene photoelect rochemical solar cell, utilizing a regenerative polyiodide and ferri/f errocyanide redox couple, is demonstrated.