Green and room-temperature synthesis of aqueous CuInS2 and Cu2SnS3 nanocrystals for efficient photoelectrochemical water splitting

Xu，Jun1; Sun，Weijun1; Hu，Zhengqiao1; You，Yu1; Lu，Yingchun1; Zhou，Ru2; Zhang，Junjun3

2018-12-01

10.1016/j.mtener.2018.09.010

Materials Today Energy   影响因子和分区

24686069

2468-6069

In this work, green synthesis of aqueous ternary CuInS (CIS) and CuSnS (CTS) nanocrystals has been realized by a simple one-pot mixing route. The synthesis is performed at room temperature without using long-chain capping agents, possessing ecofriendly, low-cost and low-energy-consuming merits. The chalcopyrite CIS nanocrystals with a size of 3–5 nm exhibit a prominent photoluminescence peak at 713 nm, revealing a bandgap of 1.74 eV. Sensitization of the nanocrystals on the surface of ZnO nanorod arrays is achieved through spin-coating followed by thermal treatment. Both the CIS and CTS nanocrystals-sensitized ZnO nanorod arrays grown on F-doped tin oxide (FTO) glass substrates are utilized as the photoanodes for efficient photoelectrochemical (PEC) water splitting. After sensitization, the photocurrent density at 1.23 V vs. NHE increases from 0.46 mA cm for the bare ZnO photoanode to 5.98 mA cm for the ZnO/CIS photoanode and 4.85 mA cm for the ZnO/CTS photoanode under one Sun illumination. The significant enhancement in PEC performance is attributed to the expanded optical absorption throughout the visible light region and the stepwise energy band alignment between ZnO and CIS/CTS facilitating for fast charge separation and transport. Our work demonstrates an appealing strategy to synthesize aqueous ternary nanocrystals by green chemistry for efficient solar energy conversion devices.

Cu2SnS3 CuInS2 Nanocrystals Photoelectrochemical performance

EI ; SCI

英语

其他

Natural Science Foundation of Guangdong Province[2018A030310225] ; National Natural Science Foundation of China[51602088] ; Fundamental Research Funds for the Central Universities[PA2018GDQT0009]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000480515400024

Elsevier Ltd

20184005908666

Electrochemistry ; Energy conversion ; II-VI semiconductors ; Light absorption ; Nanocrystals ; Nanorods ; Photoelectrochemical cells ; Semiconductor quantum wells ; Solar energy ; Substrates ; Tin oxides ; Zinc oxide

Energy Conversion Issues:525.5 ; Solar Energy and Phenomena:657.1 ; Electric Batteries:702.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Electrochemistry:801.4.1 ; Inorganic Compounds:804.2 ; Solid State Physics:933

2-s2.0-85054211754

Scopus

1.School of Electronic Science & Applied PhysicsMicro Electromechanical System Research Center of Engineering and Technology of Anhui ProvinceHefei University of Technology,Hefei,230009,China
2.School of Electrical Engineering and AutomationHefei University of Technology,Hefei,230009,China
3.Department of Materials Science and EngineeringSouthern University of Science and Technology,Shenzhen,518055,China

Xu，Jun,Sun，Weijun,Hu，Zhengqiao,et al. Green and room-temperature synthesis of aqueous CuInS2 and Cu2SnS3 nanocrystals for efficient photoelectrochemical water splitting[J]. Materials Today Energy,2018,10:200-207.

Xu，Jun.,Sun，Weijun.,Hu，Zhengqiao.,You，Yu.,Lu，Yingchun.,...&Zhang，Junjun.(2018).Green and room-temperature synthesis of aqueous CuInS2 and Cu2SnS3 nanocrystals for efficient photoelectrochemical water splitting.Materials Today Energy,10,200-207.

Xu，Jun,et al."Green and room-temperature synthesis of aqueous CuInS2 and Cu2SnS3 nanocrystals for efficient photoelectrochemical water splitting".Materials Today Energy 10(2018):200-207.