气候变化领域集成服务门户(CCPortal): Spatial control of cocatalysts and elimination of interfacial defects towards efficient and robust CIGS photocathodes for solar water splitting

CCPortal

DOI	10.1039/c7ee03650g
	Spatial control of cocatalysts and elimination of interfacial defects towards efficient and robust CIGS photocathodes for solar water splitting
	Chen M.; Liu Y.; Li C.; Li A.; Chang X.; Liu W.; Sun Y.; Wang T.; Gong J.
发表日期	2018
ISSN	17545692
起始页码	2025
结束页码	2034
卷号	11 期号:8
英文摘要	Chalcopyrite thin film absorbers such as Cu(In,Ga)Se2 (CIGS) exhibit excellent solar energy conversion efficiency, particularly when coupled with CdS to form an excellent p-n junction. To advance CIGS towards an efficient photoelectrochemical (PEC) hydrogen evolution reaction (HER), a protective overlayer (typically TiO2) is needed to prevent the corrosion of CIGS and CdS in the electrolyte, and a HER catalyst (typically Pt) is required to promote the surface reaction. However, it is a great challenge to realize delicate spatial control of the HER catalyst on the surface of the protective overlayer using the traditional deposition method. The charge transport through the CdS/overlayer interface is also of vital importance but is rarely considered. Herein, through a new two-step platinization strategy, the dispersion and particle size of Pt nanoparticles are independently controlled to realize high HER catalytic activity. Moreover, defects at the CdS/TiO2 interface are passivated via an ultrathin Al2O3 insertion layer. Consequently, we have obtained a robust CIGS/CdS/Al2O3/TiO2/Pt photocathode for PEC hydrogen evolution, which yields an applied bias photon-to-current efficiency (ABPE) of 6.6% in neutral electrolyte with a long-term stability up to 8 h (4.5% drop), and an unprecedented ABPE of 9.3% in acidic electrolyte that is the highest among chalcopyrite-based photocathodes. When paired with a BiVO4 photoanode to form a PEC tandem cell, an unbiased solar-to-hydrogen conversion efficiency of 1.01% is achieved. © 2018 The Royal Society of Chemistry.
英文关键词	Alumina; Aluminum oxide; Bismuth compounds; Cadmium sulfide; Catalyst activity; Conversion efficiency; Copper compounds; Corrosion prevention; Corrosion protection; Electrolytes; Energy conversion; Field emission cathodes; Hydrogen; II-VI semiconductors; Particle size; Photocathodes; Photoelectrochemical cells; Semiconductor junctions; Solar absorbers; Solar energy; Surface reactions; Titanium dioxide; Chalcopyrite thin films; Hydrogen evolution reactions; Long term stability; Neutral electrolytes; Photoelectrochemicals; Photon-to-current efficiencies; Solar water splitting; Solar-to-hydrogen conversions; Solar power generation; catalyst; chemical compound; chemical reaction; efficiency measurement; electrode; electrolyte; energy efficiency; nanoparticle; particle size; platinum; solar power
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/190184
作者单位	Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, China; Institute of Photoelectronic Thin Film Devices and Technology, Tianjin Key Laboratory of Thin Film Devices and Technology, Nankai University, Tianjin, 300071, China
推荐引用方式 GB/T 7714	Chen M.,Liu Y.,Li C.,et al. Spatial control of cocatalysts and elimination of interfacial defects towards efficient and robust CIGS photocathodes for solar water splitting[J],2018,11(8).
APA	Chen M..,Liu Y..,Li C..,Li A..,Chang X..,...&Gong J..(2018).Spatial control of cocatalysts and elimination of interfacial defects towards efficient and robust CIGS photocathodes for solar water splitting.Energy & Environmental Science,11(8).
MLA	Chen M.,et al."Spatial control of cocatalysts and elimination of interfacial defects towards efficient and robust CIGS photocathodes for solar water splitting".Energy & Environmental Science 11.8(2018).