Department of Chemistry, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
J Am Chem Soc. 2011 Jun 29;133(25):9932-7. doi: 10.1021/ja203224d. Epub 2011 Jun 7.
We describe a photoswitch fabricated on indium tin oxide (ITO) as a self-assembled monolayer (SAM) of two fullerene molecules, a purely organic [60]fullerene that generates an anodic current and a [70]fullerene doped with a single iron atom. This device generates a bidirectional photocurrent upon irradiation at 340 and 490 nm. The new [70]fullerene iron complex bearing three rigid carboxylic acid legs, Fe[C(70)(C(6)H(4)C(6)H(4)COOH)(3)]Cp, generates only a cathodic current upon photoexcitation between 350 and 700 nm, whereas the organic [60]fullerene absorbs at wavelengths shorter than 500 nm. The quantum efficiency of the photocurrent generation by the mixed SAM is comparable to that of a single-component SAM, indicating that the individual diode molecules on ITO generate photocurrents independently with little cross talk.
我们描述了一个基于铟锡氧化物（ITO）的光开关，它由两个富勒烯分子的自组装单层（SAM）组成，一个是产生阳极电流的纯有机[60]富勒烯，另一个是掺杂了单个铁原子的[70]富勒烯。该器件在 340nm 和 490nm 照射下产生双向光电流。新的[70]富勒烯铁配合物带有三个刚性羧酸腿，Fe[C(70)(C(6)H(4)C(6)H(4)COOH)(3)]Cp，在 350nm 到 700nm 之间的光激发下只产生阴极电流，而有机[60]富勒烯在波长小于 500nm 的地方吸收。混合 SAM 产生光电流的量子效率与单一组分 SAM 的量子效率相当，表明 ITO 上的单个二极管分子独立地产生光电流，几乎没有串扰。
