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Photoelectric Conversion Based on Proton-Coupled Electron Transfer Reactions

Published in Journal of the American Chemical Society. 2014, vol. 136, no. 22, p. 7857-7860
Abstract Making efficient use of solar energy is one of the biggest challenges of our time. In nature, solar energy can be harvested by photosynthesis where proton-coupled electron transfer (PCET) plays a critical role. Here, PCET is utilized for the first time to directly convert light energy to electrical energy. Quinone/hydroquinone PCET redox couples were used to produce a photovoltage along with spiropyrans, photoswitchable compounds that undergo reversible transformation between a ring-closed (Sp) and ring-opened form (Mc). The Mc form is more basic than the Sp form, and the open-circuit voltage (Voc) is related to the proton concentration and that of the Sp/Mc ratio controlled by light. Voc values from 100 to 140 mV were produced. In addition to direct current (Jsc ca. 9 μA cm–2), alternating current in the range of 0.1 to 200 Hz was also produced by manipulating the input light.
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XIE, Xiaojiang, BAKKER, Eric. Photoelectric Conversion Based on Proton-Coupled Electron Transfer Reactions. In: Journal of the American Chemical Society, 2014, vol. 136, n° 22, p. 7857-7860. doi: 10.1021/ja503491k https://archive-ouverte.unige.ch/unige:40155

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Deposited on : 2014-09-10

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