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DOI	10.1039/d1ee01004b
	Probing fundamental losses in nanostructured Ta3N5photoanodes: Design principles for efficient water oxidation
	Nandal V.; Pihosh Y.; Higashi T.; Minegishi T.; Yamada T.; Seki K.; Sugiyama M.; Domen K.
发表日期	2021
ISSN	17545692
起始页码	4038
结束页码	4047
卷号	14 期号:7
英文摘要	Tantalum nitride (Ta3N5) is a visible-light-responsive semiconductor that may be capable of achieving the 10% solar-to-hydrogen (STH) efficiency required to allow the commercialization of water splitting systems. However, despite immense research efforts, the highest STH efficiency yet reported for photoanodes based on Ta3N5-nanorods (NRs) is only 2.7%. Therefore, it is imperative to build a theoretical foundation that explains the various loss mechanisms and their correlations with structural and material properties, so as to optimize the performance of this material. The present work devised a detailed numerical model based on an in-depth analysis of the performance characteristics of photoanodes made from either Ba-doped or undoped Ta3N5-NRs. This experimentally calibrated optoelectrical modelling enabled predictions of various factors related to performance loss, including optical effects, charge carrier recombination and resistive loss. Certain physical parameters, such as charge carrier lifetime, diffusion length, hole extraction rate from the NR surfaces to the electrolyte and the series resistance of the photoanode, could also be calculated. The results show that the enhanced performance obtained with Ba doping can be primarily attributed to increases in the carrier lifetime and diffusion length. The present model was recalibrated using experimental data from the literature to examine hidden effects of the NRs' dimensions on optical and recombination losses. On this basis, various design principles are presented herein that should allow the fabrication of efficient Ta3N5-NRs photoanodes for commercial STH production. © The Royal Society of Chemistry.
英文关键词	Carrier lifetime; Efficiency; Electric resistance; Electrolytes; Nanorods; Semiconductor doping; Charge carrier recombination; Performance characteristics; Physical parameters; Recombination loss; Series resistances; Theoretical foundations; Visible light responsive; Water splitting system; Tantalum compounds; design method; diffusion; electrolyte; energy efficiency; nanoparticle; oxidation; probe
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190630
作者单位	Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, 305-8565, Japan; University Professors Office, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan; Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan; Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo, 153-8904, Japan
推荐引用方式 GB/T 7714	Nandal V.,Pihosh Y.,Higashi T.,et al. Probing fundamental losses in nanostructured Ta3N5photoanodes: Design principles for efficient water oxidation[J],2021,14(7).
APA	Nandal V..,Pihosh Y..,Higashi T..,Minegishi T..,Yamada T..,...&Domen K..(2021).Probing fundamental losses in nanostructured Ta3N5photoanodes: Design principles for efficient water oxidation.Energy & Environmental Science,14(7).
MLA	Nandal V.,et al."Probing fundamental losses in nanostructured Ta3N5photoanodes: Design principles for efficient water oxidation".Energy & Environmental Science 14.7(2021).