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dc.contributor.authorZheng, Jianyun
dc.contributor.authorLyu, Yanhong
dc.contributor.authorWang, R.
dc.contributor.authorXie, C.
dc.contributor.authorZhou, H.
dc.contributor.authorJiang, San Ping
dc.contributor.authorWang, S.
dc.identifier.citationZheng, J. and Lyu, Y. and Wang, R. and Xie, C. and Zhou, H. and Jiang, S.P. and Wang, S. 2018. Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode. Nature Communications. 9: 3572.

© 2018, The Author(s). The trade-offs between photoelectrode efficiency and stability significantly hinder the practical application of silicon-based photoelectrochemical devices. Here, we report a facile approach to decouple the trade-offs of silicon-based photocathodes by employing crystalline TiO2 with graded oxygen defects as protection layer. The crystalline protection layer provides high-density structure and enhances stability, and at the same time oxygen defects allow the carrier transport with low resistance as required for high efficiency. The silicon-based photocathode with black TiO2 shows a limiting current density of ~35.3 mA cm-2 and durability of over 100 h at 10 mA cm-2 in 1.0 M NaOH electrolyte, while none of photoelectrochemical behavior is observed in crystalline TiO2 protection layer. These findings have significant suggestions for further development of silicon-based, III–V compounds and other photoelectrodes and offer the possibility for achieving highly efficient and durable photoelectrochemical devices.

dc.publisherMacmillan Publishers Limited
dc.titleCrystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode
dc.typeJournal Article
dcterms.source.titleNature Communications
curtin.departmentFuels and Energy Technology Institute
curtin.accessStatusOpen access

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