Investigation of electrodeposited cobalt sulphide counter electrodes and their application in next-generation dye sensitized solar cells featuring organic dyes and cobalt-based redox electrolytes

Swami, Sanjay Kumar; Chaturvedi, Neha; Kumar, Anuj; Kapoor, Ritika; Dutta, Viresh; Frey, Julien; Moehl, Thomas; Grätzel, Michaël; Mathew, Simon; Nazeeruddin, Mohammad Khaja

doi:10.1016/j.jpowsour.2014.11.003

Cited by 68 publications

(26 citation statements)

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“…X-ray photoelectron spectra (XPS) were recorded to check surface and interfacial structures of the materials.T he main peak at 532.1 eV on the O1s XPS spectrum of hi-Mn 3 O 4 ( Figure 2a)isassigned to the lattice oxygen of Mn-O-Mn, and the weak peak might originate from other oxygen species such as Mn-O-H. [15] After coupling with CoO to form CoO/hiMn 3 O 4 ,e xcept the peaks from Mn-O-Mn and Co-O-Co (529.8 eV), [16] another peak centered at 530.9 eV is observed, which is not found on the spectrum of apure CoO and should be associated with interfacial Mn-O-Co species.M oreover, the binding energy of Mn-O-Co species in CoO/hi-Mn 3 O 4 is higher than that in CoO/Mn 3 O 4 ,s uggesting the formation of ah igh-energy interfacial structure.T he binding energy of Co2p 3/2 is 780.3 eV as can be seen on the Co2p spectrum of CoO ( Figure S9), and the spin orbit splitting values between the main peak and its corresponding satellite peak for Co2p 3/2 and Co2p 1/2 are 5.9 and 6.7 eV,respectively,which agrees with the data reported for CoO. [17] After coupling CoO with hi- positively Synchrotron-based near edge X-ray absorption fine structure (NEXAFS) technique was further used to explore the origin of the high-energy structure of CoO/hi-Mn 3 O 4 .The NEXAFS spectra of Mn L-edge that is sensitive to the oxidation state are shown in Figure 2b.B efore deposition of CoO,h i-Mn 3 O 4 presents two groups of peaks,t he peak at 640.2 eV corresponding to Mn II ,a nd the peaks (a 1 and a 2 ) from 641.0 to 643.0 eV for Mn III .…”

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Engineering High‐Energy Interfacial Structures for High‐Performance Oxygen‐Involving Electrocatalysis

et al. 2017

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Engineering high-energy interfacial structures for high-performance electrocatalysis is achieved by chemical coupling of active CoO nanoclusters and high-index facet Mn 3 O 4 nano-octahedrons (hi-Mn 3 O 4 ). At horough characterization, including synchrotron-based near edge X-raya bsorption fine structure,reveals that strong interactions between both components promote the formation of high-energy interfacial Mn-O-Co species and high oxidation state CoO,f rom which electrons are drawn by Mn III -O present in hi-Mn 3 O 4 .The CoO/ hi-Mn 3 O 4 demonstrates an excellent catalytic performance over the conventional metal oxide-based electrocatalysts,which is reflected by 1.2 times higher oxygen evolution reaction (OER) activity than that of Ru/C and ac omparable oxygen reduction reaction (ORR) activity to that of Pt/C as well as ab etter stability than that of Ru/C (95 %v s. 81 %r etained OER activity) and Pt/C (92 %vs. 78 %retained ORR activity after 10 hrunning) in alkaline electrolyte.A proper interfacial structure of heterogeneous catalysts is of great importance because it can promote the catalytic reactions occurring on the surface.[1] High-energy interfacial structures can facilitate adsorption of reactants on the surface of the catalyst, and charge transport, which result in enhancing catalytic performance.[2] Fori nstance,h eterogeneous catalysts composed of Cu and ZnO nanoparticles on Al 2 O 3 supports are effectively used for industrial production of methanol because ahigh-energy interface between Cu, ZnO, and Al 2 O 3 support can enable astrong binding of the reaction intermediates that improves catalytic activity.[3] Thec oordinatively unsaturated ferrous sites are active centers in awide range of catalytic reactions,and their catalytic activity can be significantly enhanced through high-energy interfacial confinement with metal substrates,e .g., Pt, exhibiting efficient carbon monoxide oxidation.[4] Thereby,the rational design of active materials on proper supports to generate high-energy interfacial structures is critical in fabricating high-performance heterogeneous catalysts.Oxygen-involving electrocatalytic reactions such as oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are important energy-relevant conversion processes, [5] which play important roles in metal-air batteries, fuel cells,and water electrolysis.Both OER and ORR involve am ultistep proton-coupled electron transfer, and thus suffer from ak inetically sluggish process.[6] Moreover,s ome technologies such as rechargeable metal-air batteries reversibly involve OER and ORR during the operation, and the use of two different electrocatalysts for OER (e.g.,R u) and ORR (e.g.,Pt) makes these devices much more complex because of combining two different electrodes;a lso,t heir volumetric energy density is unfavorable.[7] Thus,h igh-performance bifunctional oxygen-involving electrocatalysts are highly desirable.Recently,t here is ag reat interest in fabricating nanostructured composite materials by depositing abundan...

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Engineering High‐Energy Interfacial Structures for High‐Performance Oxygen‐Involving Electrocatalysis

et al. 2017

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“…5a gives R CT values of about 0.3 U cm 2 and 427.1 U cm 2 for CTSe and Pt, respectively, confirming a significant improvement in catalytic performance with CTSe. It is important to note that as required in a DSSC device, an ideal R ct value of the QDSC CE toward polysulfide electrolyte is expected to be lower than 1 U cm 2 for high performance solar cells [62,63]. This suggests that the proposed CTSe is a very suitable catalytic material and can be an excellent candidate to serve as an efficient CE in QDSCs.…”

Section: Resultsmentioning

confidence: 99%

Earth-abundant Cu2SnSe3 thin film counter electrode for high-efficiency quantum dot-sensitized solar cells

Liu

Zhu

et al. 2015

Journal of Power Sources

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“…Applications of Dye Sensitized Solar Cell (DSSC) using dye as catcher sunlight is potential to be developed because DSSC produces electricity and its applications easily be applied to life. 2 Dye or pigment of plants which is often used as photosensitizer in previous research is chlorophyll powder of Classic Mulberry Powder (CMP). Researchers have proven that chlorophyll and xanthophyll can be excited by the exposure of the dye.…”

Section: Introductionmentioning

confidence: 99%

THE STUDY OF EFFECT OF METAL ION Fe(III) ON THE CHLOROPHYLL AS POTENTIAL PHOTOSENSITIZER ON DYE SENSITIZED SOLAR CELL

2017

Rasayan J Chem

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The energy crisis is major problem facing the world today, so it takes renewable energy source that are environmentally friendly and can be renewed, one of which is Dye Sensitized Solar Cell (DSSC). DSSC is one of the photochemical electric cells that can convert solar energy into electrical energy. This research aims to study the characteristics of chlorophyll compounds with the addition of metal ions

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Investigation of electrodeposited cobalt sulphide counter electrodes and their application in next-generation dye sensitized solar cells featuring organic dyes and cobalt-based redox electrolytes

Cited by 68 publications

References 50 publications

Engineering High‐Energy Interfacial Structures for High‐Performance Oxygen‐Involving Electrocatalysis

Engineering High‐Energy Interfacial Structures for High‐Performance Oxygen‐Involving Electrocatalysis

Earth-abundant Cu2SnSe3 thin film counter electrode for high-efficiency quantum dot-sensitized solar cells

THE STUDY OF EFFECT OF METAL ION Fe(III) ON THE CHLOROPHYLL AS POTENTIAL PHOTOSENSITIZER ON DYE SENSITIZED SOLAR CELL

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