ArticleProceedings of the National Academy of Sciences of the United States of America2019
Excitation energy-dependent photocurrent switching in a single-molecule photodiode.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Efficient hydrogen generation from NaBH₄ methanolysis using a lithium-enhanced Dawson-type polyoxometalate catalyst.Scientific reports · 2026Article
- Ultrafast Electron Dynamics of a Ferrocene-Based Butadiyne-Bridged Complex.The journal of physical chemistry. A · 2026Article
- Electronic structure and photophysics of a supermolecular iron complex having a long MLCT-state lifetime and panchromatic absorption.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
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11 authors.
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Abstract
The direction of electron flow in molecular optoelectronic devices is dictated by charge transfer between a molecular excited state and an underlying conductor or semiconductor. For those devices, controlling the direction and reversibility of electron flow is a major challenge. We describe here a single-molecule photodiode. It is based on an internally conjugated, bichromophoric dyad with chemically linked (porphyrinato)zinc(II) and bis(terpyridyl)ruthenium(II) groups. On nanocrystalline, degenerately doped indium tin oxide electrodes, the dyad exhibits distinct frequency-dependent, charge-transfer characters. Variations in the light source between red-light (∼1.9 eV) and blue-light (∼2.7 eV) excitation for the integrated photodiode result in switching of photocurrents between cathodic and anodic. The origin of the excitation frequency-dependent photocurrents lies in the electronic structure of the chromophore excited states, as shown by the results of theoretical calculations, laser flash photolysis, and steady-state spectrophotometric measurements.
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