Suppression of charge recombination by application of Cu2ZnSnS4-graphene counter electrode to thin dye-sensitized solar cells

Li, Yan; Guo, Huafei; Wang, Xiuqin; Yuan, Ningyi; Ding, Jianning

doi:10.1007/s11434-016-1120-0

Cited by 7 publications

(4 citation statements)

References 37 publications

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“…However, currently, research has spilled into fabrication of quaternary metallic–sulphide composites. Li [54] undertook the fabrication of a CuZnSnS 4 –graphene counter electrode for use in DSSCs. The CuZnSnS 4 (CZTS) being a p-type semiconductor has a large optical absorption coefficient (>10 4 cm −1 ) as well as excellent electrocatalytic activity.…”

Section: Counter Electrodementioning

confidence: 99%

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Metal Sulphides and Their Carbon Supported Composites as Platinum-Free Counter Electrodes in Dye-Sensitized Solar Cells: A Review

et al. 2019

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Energy sufficiency is a critical requirement for the economic prosperity of modern countries. Efficient harnessing of solar energy using technologies such as the dye-sensitized solar cell could solve the energy problem which persistently plagues developing countries. Despite having a simple operational procedure and modest power conversion efficiency of 13.8%, the dye-sensitized solar cell consists of an expensive platinum counter electrode which makes commercial success futile. Thus, this review intends to establish the progress researchers have attained in the development of sulphide based counter electrodes as alternatives to platinum, thereby lowering cost of production. Metallic sulphides are good electrocatalysts and cheap, hence, they possess the necessary requirements for effective functional counter electrodes. Furthermore, ternary metallic sulphides are known to exhibit higher efficiencies stemming from the synergistic effect produced by the co-existence of two metal ions in a crystal structure, which is believed to induce greater catalytic capability. Incorporation of metallic sulphides with carbon materials, which are exceptional electrical conductors, could potentially produce more efficient counter electrodes. In that regard, this review seeks to establish the effect recently developed composite counter electrodes comprising metallic sulphides and carbon-based materials have induced on the functionality of the counter electrode (CE).

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Section: Counter Electrodementioning

confidence: 99%

“…( a ) SEM, ( b ) CV, and ( c ) EIS micrographs for Pt, Copper-zinc-tin-sulphide (CZTS), and CZTS–graphene. Reproduced with permission from Reference [54], Elsevier 2016.…”

Section: Figurementioning

confidence: 99%

Metal Sulphides and Their Carbon Supported Composites as Platinum-Free Counter Electrodes in Dye-Sensitized Solar Cells: A Review

et al. 2019

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“…However, the conductivity of CZTS is relatively small, which will not ideally meet the conductive requirements for counter electrode in DSSCs and block its practical application in DSSCs. To further enhance the performance of CZTS counter electrode, some carbon materials were introduced to construct CZTS-based composited materials [26][27][28]. It is found that carbon materials in these CZTSbased composited materials can really improve the conductivity of CZTS counter electrode.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, to what extent should the conductivity be improved and can the catalytic activity be weakened are the key points to construct an efficient CZTS/carbon material-composited counter electrode. However, the present reports on CZTS/carbon composite counter electrode materials are usually focused on the selection of the carbon materials or the synthesis of composited materials [26][27][28]. The balance of catalytic activity and conductivity of CZTS/ carbon materials counter electrode was rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Balance of catalytic activity and conductivity of Cu2ZnSnS4/graphene counter electrode for dye-sensitized solar cells: using hydrothermal-synthesized kesterite Cu2ZnSnS4 and graphene obtained by product line

Wei

Chen

et al. 2020

J Solid State Electrochem

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The catalytic activity and conductivity of Cu 2 ZnSnS 4 /graphene counter electrode for dye-sensitized solar cells (DSSCs) was balanced using hydrothermal-synthesized kesterite Cu 2 ZnSnS 4 and graphene obtained by product line. It was found that the electrocatalytic activity of Cu 2 ZnSnS 4 /graphene counter electrode was adjustable by balancing its catalytic activity and conductivity using varied weight ratio of graphene in the composited material of Cu 2 ZnSnS 4 /graphene. When the weight percent of graphene was 2% to Cu 2 ZnSnS 4 , the catalytic activity and conductivity of Cu 2 ZnSnS 4 /graphene counter electrode came to the balanced point, resulting in the best electrocatalytic activity. Under the balanced conditions, the dye-sensitized solar cell devices based on Cu 2 ZnSnS 4 /graphene counter electrode show a maximum solar-to-electrical power efficiency of 3.71% (with shortcircuit photocurrent density J sc of 13.24 mA cm −2 , open-circuit photovoltage V oc of 0.63 V, and fill factor FF of 0.44), which is higher than that of unbalanced counter electrode. Although the photovoltaic performance of DSSCs based on Cu 2 ZnSnS 4 / graphene counter electrode was a little lower than that of DSSCs based on platinum (Pt) counter electrode (4.95%), it is believed that Cu 2 ZnSnS 4 /graphene counter electrode would outperform Pt counter electrode by further balancing its catalytic activity and conductivity using higher-quality and more matched Cu 2 ZnSnS 4 and graphene. This strategy to improve the electrocatalytic activity of counter electrode will be helpful for exploring facile synthesis, low-cost, and efficient Cu 2 ZnSnS 4 -based composited counter electrode materials. Keywords Dye-sensitized solar cells . Cu 2 ZnSnS 4 /graphene composited materials . Counter electrode . Balance of catalytic activity and conductivity . Electrocatalytic activity Dedicated to the memory of Ivo Alexandre Hümmelgen

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One‐pot Synthesis of CZTS/RGO Composite Material and its Electro‐Catalytic Performance towards Triiodide Reduction in Dye‐Sensitized Solar Cells

Wei

Zhan

et al. 2019

ChemistrySelect

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The composite material of quaternary kesterite type Cu 2 ZnSnS 4 and reduced graphene oxide (CZTS/RGO) was successfully synthesized by a one-pot hydrothermal synthesis method. When applied as counter electrode materials for dye-sensitized solar cells, it shows better electro-catalytic performance towards reduction of triiodide. The DSSCs based on CZTS/RGO counter electrode shows a maximum solar-to-electrical power efficiency of 3.08%, which is much higher than that of pure CZTS counter electrode (1.41%) and pure RGO counter electrode (1.55%) prepared under the same conditions. The weight percent of GO to CZTS raw material used to synthesize CZTS/RGO is an important factors to affect the photovoltaic performance of DSSCs based on CZTS/RGO counter electrode. It is believed that as-synthesized CZTS/RGO can potentially be used as alternative counter electrode materials to replace the expensive Pt counter electrode, and this one-pot synthetic method will be helpful for exploring facile synthetic route of low-cost and efficient CZTS based composite counter electrode materials.[a] Dr.

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Suppression of charge recombination by application of Cu2ZnSnS4-graphene counter electrode to thin dye-sensitized solar cells

Cited by 7 publications

References 37 publications

Metal Sulphides and Their Carbon Supported Composites as Platinum-Free Counter Electrodes in Dye-Sensitized Solar Cells: A Review

Metal Sulphides and Their Carbon Supported Composites as Platinum-Free Counter Electrodes in Dye-Sensitized Solar Cells: A Review

Balance of catalytic activity and conductivity of Cu2ZnSnS4/graphene counter electrode for dye-sensitized solar cells: using hydrothermal-synthesized kesterite Cu2ZnSnS4 and graphene obtained by product line

One‐pot Synthesis of CZTS/RGO Composite Material and its Electro‐Catalytic Performance towards Triiodide Reduction in Dye‐Sensitized Solar Cells

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