Significant Broadband Photocurrent Enhancement by Au-CZTS Core-Shell Nanostructured Photocathodes

Zhang, Xuemei; Wu, Xu; Centeno, Anthony; Ryan, Mary P.; Alford, Neil McN.; Riley, David; Xie, Fang

doi:10.1038/srep23364

Cited by 27 publications

(35 citation statements)

References 32 publications

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“…In another recent report by Zhang et al . where comparative study is being done on bare wurtzite CZTS and core@shell Au@wurtzite CZTS as CE material in DSSC shows that Au@CZTS shows better photoconversion efficiency that bare CZTS which is even 15.8% higher than Pt CE as shown in Figure a, b . The higher absorption of energy due to the plasmon resonance energy transfer (PRET) from localized surface plasmon resonance (LSPR) to embedded Au and lesser scattering at Au@CZTS interface are the contributing factor for above enhancement in photo conversion efficiency as shown in Figure c, d. CoPt tipping on CZTS nanoparticles in different composition (Co/Pt ratios: Co/Pt=0.5; Co/Pt=1; Co/Pt=2) have shown to improve the H 2 evolution efficiency in comparison to bare CZTS and even Au‐CZTS hybrid nanomaterial .…”

Section: Photoelectrochemical and Photocatalytic Applicationsmentioning

confidence: 96%

Multifunctional Copper‐Based Quaternary Chalcogenide Semiconductors Toward State‐of‐the‐Art Energy Applications

Kush

Deka

2018

ChemNanoMat

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Cu-based quaternary chalcogenide semiconductors have been attractive materials in many aspects since the last decade. Most of the scientific literature about quaternary chalcogenides is dedicated to photovoltaic (PV) research with no astonishment as the material initially emerged as a costeffective replacement of expensive Si for PV applications. These materials possess all the important properties such as, abundant and non-toxic constituent elements, efficient charge transport, optimum band gap, and high absorption coefficient for being an efficient PV material in either thin film or nanoparticle form. However, in the recent few years, a new range of quaternary materials Cu 2 M I M II X 4 (where, M I =Zn, Ni, Co, Fe, Mn, Cd and Hg; M II =Si, Sn and Ge and X=S and/or Se) have evolved and found applications in thermoelectrics, photocatalysis and photoelectrocatalysis, sensors and bat-teries etc. The combination of properties exhibited by these quaternary chalcogenides such as optical and electric, optical and magnetic, electric and thermal makes them potential materials, which could be utilized in multiple applications. Although the PV properties of these quaternary chalcogenides has been discussed earlier in many reports, the other versatile applications of the material have not been reviewed yet. The present article sheds light on the multifunctional aspects of various new Cu-based quaternary chalcogenides, their synthesis, effect of doping on their properties, and then elaborating the discussion on their chemical and physical properties that are helpful in different applications along with photovoltaics. Here, we discuss synthetic methods bestowing enhanced features and also summarize their achieved efficiency in recent years. Scheme 1. Schematic representation for the derivation of quaternary chalcogenides. 2 3 4 5 6 7 8

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Section: Photoelectrochemical and Photocatalytic Applicationsmentioning

confidence: 96%

Multifunctional Copper‐Based Quaternary Chalcogenide Semiconductors Toward State‐of‐the‐Art Energy Applications

Kush

Deka

2018

ChemNanoMat

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“…135 Plasmonic Au Nanoparticle core is actually helps to CZTS nanocrystalline shell in a core-shell mechanism manner to develop Au@CZTS coreshell nanostructures which actually enhance the efficiency of the device as reported by . 136 Expect disk, plates and particles nanorods can be also prepared by a facile solvothermal method as reported by Miyauchi et al (2012). 137 Interestingly, CZTS in form of nanofibers has also been prepared by Mali et al (2014) by electrospinning process using the polyvinylpyrrolidone (PVP) and cellulose acetate solvent separately.…”

Section: Synthesis and Morphology Evaluation Of Cu 2 Snznsmentioning

confidence: 98%

A review on applications of Cu2ZnSnS4 as alternative counter electrodes in dye-sensitized solar cells

et al. 2018

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A contribution of counter electrode (CE) emphasis a great impact towards enhancement of a dye-sensitized solar cell's (DSSC) performance and Pt based CE sets a significant benchmark in this field. Owing to cost effective noble metal, less abundance and industrial large scale application purpose, an effective replacement for Pt is highly demanded. There are several approaches to improve the performance of a CE for enhancing the power conversion efficiency with a less costly and facile device. To address this issue, reasonable efforts execute to find out suitable replacement of Pt is becoming a challenge by keeping the same electrochemical properties of Pt in a cheaper and eco-friendlier manner. With this, cheaper element based quaternary chalcogenide, Cu2ZnSnS4 (CZTS) becomes a prominent alternative to Pt and used as a successful CE in DSSC also. This review presents brief discussion about the basic properties of CZTS including its synthesis strategy, physicochemical properties and morphology execution and ultimate application as an alternative Pt free CE for a low cost based enhanced DSSC device. It is therefore, imperative for engineering of CZTS material and optimization of the fabrication method for the improvement of DSSC performance.

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“…Among the available Pt-free electrocatalyst materials, transition metal oxides, sulphides, nitrides and carbides showed promising electrocatalytic performance in DSSCs. [10][11][12][13][14] In addition, the quaternary semiconductor CZTS geared notable attention in DSSCs owing to less toxic, earth abundance, [15][16][17][18] and high hole concentration [19] of ~1.2×10 15 to 3.1×10 20 cm -3 . Digraskar et al [20] demonstrated the feasibility of CZTS electrocatalyst in powder form toward water reduction into hydrogen fuel.…”

Section: Introductionmentioning

confidence: 99%

“…The CZTS films can be directly formed on substrates or deposited from the presynthesised nanocrystals. The pre-synthesised colloidal CZTS nanocrystals or inks were transformed onto conducting substrates by spin coating, [15,16] or spray coating [17]. The hydrothermal/solvothermaldeposition, [18,24]electrospun, [25,26] spray coating, [27] electrodeposition, [28,29] sputtering, [23] and pulsed laser deposition [24] methods have been used for direct deposition of CZTS onto substrates.…”

Section: Introductionmentioning

confidence: 99%

Jet nebulizer-spray coated CZTS film as Pt-free electrocatalyst in photoelectrocatalytic fuel cells

Kirubakaran¹,

Dhas²,

Jain

et al. 2019

Applied Surface Science

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The copper zinc tin sulphide (CZTS) is a promising p-type earth abundant alloy that received profound attention as an electron driven dark catalyst in electrocatalytic reduction reactions. In particular, the photoelectrocatalysis based solar fuel cell encompass with inexpensive electrocatalyst (hydrogen evolution reaction) is anticipated to support to reduce the overall system cost. However, demonstrating CZTS as Pt-free counter electrode in photoelectrocatalytic fuel cells is scarce. Because, achieving high electronic conductivity, favourable (112) crystalline structure towards high electrocatalytic property through low cost vacuum-free technique is remains challenge. In this report, we demonstrate p-type CZTS film fabrication at different processing temperature (250, 300, and 350 C) using jet nebulizer spray (JNS) coating technique. The processing temperature play a key role on crystalline property, composition, and catalytic activity of CZTS. The x-ray diffraction and energy dispersive analysis results reveals that the CZTS film prepared 250 C exhibit kesterite structure oriented in (112) direction. The electrocatalytic reduction property of assynthesised CZTS electrodes in water reduction process is tested in aqueous 1 M NaOH solution. Among the different temperature processed films, CZTS prepared at 250 C result high electrocatalytic reduction activity ~-2.1 mAcm-2 at-0.44 V vs Ag/AgCl. In addition, these film exhibits high electrical conductivity than that of other CZTS samples. Therefore, optimised CZTS 250 C film is further examined in hydrogen peroxide (H2O2) reduction which result enhanced electrical current generation after adding the 1 M of hydrogen peroxide in PBS electrolyte based electrochemical cell. This encouraged to apply as Pt-free counter electrode in H2O2 electrolyte based photoelectrocatalytic fuel cells. The PEC cells encompass with TiO2 nanowire photoelectrode, and CZTS-250˚C counter electrode showed feasible photocurrent generation compared to conventional Pt counter electrode. This proofof-concept type Pt-free PEC cells leads to open new paths in implementing wide-range of semiconductor based electrocatalyst to support in development of low-cost photoelectrocatalytic fuel cells.

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Significant Broadband Photocurrent Enhancement by Au-CZTS Core-Shell Nanostructured Photocathodes

Cited by 27 publications

References 32 publications

Multifunctional Copper‐Based Quaternary Chalcogenide Semiconductors Toward State‐of‐the‐Art Energy Applications

Multifunctional Copper‐Based Quaternary Chalcogenide Semiconductors Toward State‐of‐the‐Art Energy Applications

A review on applications of Cu2ZnSnS4 as alternative counter electrodes in dye-sensitized solar cells

Jet nebulizer-spray coated CZTS film as Pt-free electrocatalyst in photoelectrocatalytic fuel cells

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