Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode

doi:10.1038/s41467-018-05580-z

	Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode
	Zheng, Jianyun 1,2; Lyu, Yanhong 1,2; Wang, Ruilun ; Xie, Chao ; Zhou, Huaijuan 3; Jiang, San Ping 1,2; Wang, Shuangyin
刊名	NATURE COMMUNICATIONS
	2018
卷号	9
ISSN号	2041-1723
DOI	10.1038/s41467-018-05580-z
英文摘要	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 similar to 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 photo-electrodes and offer the possibility for achieving highly efficient and durable photoelectrochemical devices.
学科主题	Multidisciplinary Sciences
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000443466700012
资助机构	The authors are grateful to the National Natural Science Foundation of China (51402100 and 21573066), the Provincial Natural Science Foundation of Hunan (2016JJ1006 and 2016TP1009), the Shanghai Sailing Program (17YF1429800) and Australian Research Council (DP180100568). ; The authors are grateful to the National Natural Science Foundation of China (51402100 and 21573066), the Provincial Natural Science Foundation of Hunan (2016JJ1006 and 2016TP1009), the Shanghai Sailing Program (17YF1429800) and Australian Research Council (DP180100568).
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24684]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China 2.Curtin Univ, Western Australian Sch Mines Minerals Energy & Ch, Perth, WA 6102, Australia 3.Curtin Univ, Fuels & Energy Technol Inst, Perth, WA 6102, Australia 4.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Jianyun,Lyu, Yanhong,Wang, Ruilun,et al. Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode[J]. NATURE COMMUNICATIONS,2018,9.
APA	Zheng, Jianyun.,Lyu, Yanhong.,Wang, Ruilun.,Xie, Chao.,Zhou, Huaijuan.,...&Wang, Shuangyin.(2018).Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode.NATURE COMMUNICATIONS,9.
MLA	Zheng, Jianyun,et al."Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode".NATURE COMMUNICATIONS 9(2018).