Surface modification of CuS counter electrodes by hydrohalic acid treatment for improving interfacial charge transfer in quantum-dot-sensitized solar cells

Muthalif, Mohammed Panthakkal Abdul; Choe, Youngson

doi:10.1016/j.jcis.2021.03.113

Cited by 16 publications

(4 citation statements)

References 48 publications

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“…The effect of using different acids during the synthesis of CuS CE was investigated by Muthalif et al [146] It was noted that the acid influences the morphology and roughness of the CuS CE, consequently affecting the catalytic activity. The study showed that HF acid generates a film with a smaller gap between particles and greater roughness, thus producing CuS CE with greater efficiency compared to other fatty acids.…”

Section: Metallic Sulfidesmentioning

confidence: 99%

Recent Progresses in Quantum‐Dot‐Sensitized Solar Cells: The Role of Counter Electrodes

Carvalho Junior,

Nunes,

Machado

et al. 2024

Energy Tech

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Energy demand, global warming, environmental impacts, sustainability, and energy sources are some of the concerns faced by humanity. Quantum‐dot‐sensitized solar cells (QDSSC) are an alternative solution to addressing some of these issues, in addition to reducing the costs of producing electrical energy. However, QDSSCs present stability problems and low efficiency, less than 16%. In light of this challenge, this review aims to present the main strategies adopted to reduce energy losses that occur in each component of the solar cell, with a focus on one key component: the counter electrode (CE). The CE plays a crucial role in collecting electrons and regenerating the electrolyte, thus impacting the lifespan and efficiency of QDSSCs. As such, this review discusses the main advancements in CEs based on key materials such as metal sulfides, carbonaceous materials, and composites. The efforts related to the synthesis and application of different counter electrodes for QDSSCs are explored.

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Section: Metallic Sulfidesmentioning

confidence: 99%

Recent Progresses in Quantum‐Dot‐Sensitized Solar Cells: The Role of Counter Electrodes

Carvalho Junior,

Nunes,

Machado

et al. 2024

Energy Tech

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“…The second semicircle is related to the Nernst diffusion impedance (Z N ) in the electrolyte. 14,41 The EIS parameters fitted according to the equivalent circuit diagram (Fig. 7b) are shown in Fig.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

“…9 Therefore, the exploration and design of alternative CE catalysts with lower prices and higher catalytic performance have become a longterm research topic in the development of QDSSCs. To date, carbonaceous catalysts, 10,11 metallic compounds, [12][13][14] conductive polymers, 15 and composites consisting of the above other catalyst combinations 9,16,17 have been successfully used as CEs of QDSSCs and exhibit excellent catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Structurally optimized intrinsic defect carbon driven polysulfide reduction reaction for quantum dot sensitized solar cells

Zhang

Peng

et al. 2022

Catal. Sci. Technol.

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“…[5][6][7][8] But still the conversion efficiency of QDSSCs is limited, and is highly challenging to improve the PCE of QDSSCs. Recently several strategies have been followed to improve the PCE of QDSSC by modifying the sensitizers, 9 photoanodes, 10 CEs, 11 and electrolytes. 12 Moreover, recent research focusing on enhancing the efficacy of non-toxic materials in QDSSCs to develop cells with eco-friendly components.…”

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confidence: 99%

The effect of graphene quantum dots/ ZnS co‐passivation on enhancing the photovoltaic performance of CdS quantum dot sensitized solar cells

et al. 2021

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The effect of graphene quantum dots (GQDs) as a passivating layer for cadmium sulfide (CdS) quantum dot-sensitized solar cell (QDSSC) has been investigated. GQDs were prepared by the liquid exfoliation method. The optical properties of GQDs were studied by UV-Vis and photoluminescence spectroscopies. The morphology of GQDs was studied by transmission emission morphology (TEM) analysis. Further, the photoexcitation behavior of GQDs has been studied in detail using emission spectroscopy and its effect on the photovoltaic performance of CdS QDSSC has been explored using J-V analysis. The efficacy of GQDs as passivation layer over the CdS loaded titanium dioxide (TiO 2 ) photoanode in QDSSC is high and thereby improved the open-circuit voltage (V oc ) (555 mV) compared to zinc sulfide (ZnS) passivated QDSSC (509 mV). As a result, the photoconversion efficiency (PCE) of GQD-passivated QDSSC is relatively enhanced up to 25% higher than that of ZnS-passivated QDSSC under similar conditions. A high PCE of 4.26% has been achieved for GQD/ZnS co-passivated QDSSC, which is 31% higher than ZnS-passivated QDSSC. Besides, the impedance analysis revealed low internal resistance and high charge recombination resistance in the GQD-passivated QDSSC when compared to other cells. The presence of GQD layer suppressed the recombination with high electron transport and thereby improved the PCE of QDSSC. The present study shows the possibility of using GQDs as an interfacial passivation layer between the sensitizer and electrolytes for enhancing the photovoltaic performance of CdS-based QDSSCs.

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Surface modification of CuS counter electrodes by hydrohalic acid treatment for improving interfacial charge transfer in quantum-dot-sensitized solar cells

Cited by 16 publications

References 48 publications

Recent Progresses in Quantum‐Dot‐Sensitized Solar Cells: The Role of Counter Electrodes

Recent Progresses in Quantum‐Dot‐Sensitized Solar Cells: The Role of Counter Electrodes

Structurally optimized intrinsic defect carbon driven polysulfide reduction reaction for quantum dot sensitized solar cells

The effect of graphene quantum dots/ ZnS co‐passivation on enhancing the photovoltaic performance of CdS quantum dot sensitized solar cells

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