Metal‐free di‐branched organic sensitizers, containing different heteroaromatic (phenothiazine, phenoxazine and carbazole) donor moieties, have been investigated as photoactive anode sensitizers in the photoelectrochemical generation of oxygen and water splitting. Photoelectrochemical properties have been studied both in the presence of a sacrificial electron donor, to closely evaluate the charge‐transfer phenomena and the external quantum efficiency, and with a common water oxidation catalyst, to preliminarily assess the photoelectrochemical water‐splitting activity and oxygen production. The experimental performance trend, in terms of photogenerated charge and evolved gas, was phenothiazine>carbazole>phenoxazine, arising from superior light‐harvesting capability and more efficient electron injection to the semiconductor.

中文翻译：

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染料敏化光电化学电池中用于光阳极水分解的有机增敏剂

含有不同杂芳族（吩噻嗪，吩恶嗪和咔唑）供体部分的无金属双分支有机敏化剂已作为光敏阳极敏化剂在光电化学产生氧气和水分解中进行了研究。已经在牺牲电子供体的存在下研究了光电化学性质，以密切评估电荷转移现象和外部量子效率，并使用常见的水氧化催化剂来初步评估光电化学的水分解活性和产氧量。就光生电荷和逸出气体而言，实验性能的趋势是吩噻嗪>咔唑>吩恶嗪，这归因于优异的光收集能力和更有效的电子注入半导体。