Design Principles for Construction of Charge Transport Channels in Particle-Assembled Water-Splitting Photoelectrodes

Charge transport in a photoelectrode largely influences its solar-to-chemical energy conversion efficiency. Especially, particle-assembled photoanode films are always subject to poor interparticle electron transport. The electron transport channel between the particles is usually constructed by usin...

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Published inACS sustainable chemistry & engineering Vol. 7; no. 12; pp. 10509 - 10515
Main Authors Zhang, Ningsi, Zheng, Haoliang, Guo, Yongsheng, Feng, Jianyong, Li, Zhaosheng, Zou, Zhigang
Format Journal Article
LanguageEnglish
Published American Chemical Society 17.06.2019
Subjects
electron transfer
energy conversion
ferric oxide
semiconductors
tin dioxide
Charge transport
Photoanode
Solar energy conversion
Particle-assembled electrode
Necking
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Summary:Charge transport in a photoelectrode largely influences its solar-to-chemical energy conversion efficiency. Especially, particle-assembled photoanode films are always subject to poor interparticle electron transport. The electron transport channel between the particles is usually constructed by using a necking process, in order to overcome the poor interparticle electron transport. In this study, Sb-doped SnO2, as a transparent and degenerate semiconductor, has been found to act as a novel necking material for constructing electron transport channels in particle-assembled photoanode films. As a result, it greatly improves the water-splitting performances of particle-assembled α-Fe2O3 photoanodes. We have formulated design principles for construction of charge transport channels in particle-assembled water-splitting photoelectrodes.
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ISSN:2168-0485
2168-0485
DOI:10.1021/acssuschemeng.9b01067