Nanocomposites of Multi-walled Carbon Nanotubes and Titanium dioxide (MWCNTs/TiO2) as affective counter electrode materials for Platinum-free Dye-Sensitized Solar Cells (DSSCs)

Mehmood, Umer; Ishfaq, Abdulrehman; Sufyan, Muhammad

doi:10.1016/j.solener.2021.04.018

Cited by 18 publications

(4 citation statements)

References 15 publications

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“…The introduction of MWCNTs is observed to considerably enhance power conversion efficiency (Figure 8a, Table 3), peaking at 4.044% for an optimal loading of 6 wt.%-nearly 6 times higher than pure BaTiO 3 (0.693%). This stems from simultaneous improvements in the opencircuit voltage (V OC ) and short-circuit current (J SC ) enabled by favorable band structure alterations and accelerated charge kinetics, respectively [76,77]. However, further increasing MWCNT content to 10 wt.% reverses output metrics due to concentration-dependent limitations.…”

Section: Solar Cell Evaluationmentioning

confidence: 99%

Enhancing Photovoltaic Performance with BaTiO3/MWCNTs Composite Photoelectrodes in Dye-Sensitized Solar Cells

Polo Bravo,

Caceres Osnayo,

Chacaltana García

et al. 2024

Crystals

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Dye-sensitized solar cells (DSSCs) have attracted renewed research interest as a potential low-cost substitute for conventional silicon photovoltaics. This work aims to improve the photovoltaic performance of the DSSCs by incorporating multi-walled carbon nanotubes (MWCNTs) into the BaTiO3 photoelectrode. The pure BaTiO3 and BaTiO3/MWCNT nanocomposites were sensitized with N719 dye and fabricated into solar cell devices for testing. The structural characterization confirmed the successful formation of the nanocomposite with an optimal dispersion at 6% of MWCNT incorporation, beyond which agglomeration effects manifested. The optical analysis verified the modulation of defect states and bandgap engineering induced by the MWCNT network. The morphological studies revealed irregular nanoparticle clusters with embedded nanotubes. Solar cell testing under AM1.5G-simulated sunlight demonstrated a peak power conversion efficiency of 4.044% for 6% of MWCNT doping, constituting a 6-fold increment versus pure BaTiO3 (0.693%). It originated from the simultaneous enhancements in the open-circuit voltage and short-circuit current enabled by the favorable band structure alterations and percolation-assisted charge transport. However, further increasing MWCNT content deteriorated the device metrics, owing to emerging limitations like trapping. The rational integration of multi-walled carbon nanotubes with lead-free ferroelectric metal oxides can contribute to the development of emerging organic-inorganic hybrid solar platforms.

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Section: Solar Cell Evaluationmentioning

confidence: 99%

Enhancing Photovoltaic Performance with BaTiO3/MWCNTs Composite Photoelectrodes in Dye-Sensitized Solar Cells

Polo Bravo,

Caceres Osnayo,

Chacaltana García

et al. 2024

Crystals

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“…Currently, the goal of developing DSSCs is to achieve high efficiency and to reduce production costs, which are new challenges for researchers. Carbon black 5 , multi-walled carbon nanotubes 6 , conductive polymers 7 , active carbon 8 , and metal oxide materials 9 , 10 as well as sulfide materials 11 have been used to replace expensive catalytic Pt because of their high electrical conductivity, chemical resistance, electrocatalytic properties and low cost. Our research focuses on the development of novel Pt-free CE materials that are both low-cost and environmentally friendly, as well as consideration of waste recycling by including solid waste from power plants.…”

Section: Introductionmentioning

confidence: 99%

Fly ash boosted electrocatalytic properties of PEDOT:PSS counter electrodes for the triiodide reduction in dye-sensitized solar cells

Kanjana

Maiaugree

Laokul

et al. 2023

Sci Rep

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Fly ash solid waste from a power plant was applied in a solar cell application for the first time. A doctor blade was used to coat FTO-glass with a composite film of mixed fly ash and PEDOT:PSS (FP). XRD, FTIR, SEM, EDX, and BET analyses were used to elucidate the crystal structure, morphology, and functional groups of fly ash in the current research. A significantly high efficiency solar cell was fabricated utilizing fly ash. CV, Tafel, and EIS analyses indicated a decrease in charge transfer resistance and an increased catalytic activity in the counter electrodes. The performance of DSSCs made from FP counter electrodes varied depending on the percentage of fly ash particles present. Fly ash mixed with PEDOT:PSS in a concentration ratio of 2:5 g/mL showed a high efficiency of 4.23%, which is comparable to Pt DSSC's (4.84%). Moreover, FP-2:5 presented a more highly efficient electrode than counter electrodes made from PEDOT:PSS mixed with MoO (3.08%) and CoO (3.65%). This suitability of this low-cost CE material for use in DSSCs has been established.

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“…For instance, alternatives are transition metal sulfides, phosphides, selenides, nitrides and carbides for HER, [18][19][20][21][22] as well as nanocomposites, transition metal oxides and layered dihydroxygenates for OER. [23][24][25] Significantly, common electrocatalysts usually work well in acidic electrolytes for HER, while in alkaline electrolytes for OER. 26,27 The difference of pH value for electrocatalytic medium takes it a great challenge to combine HER with OER electrocatalysts for water electrolysis.…”

Section: Introductionmentioning

confidence: 99%

“…From this, the manufacture of low‐cost and abundant in crust catalysts to replace commercial Pt/C for HER and RuO 2 /IrO 2 for OER has become one of research hotspots. For instance, alternatives are transition metal sulfides, phosphides, selenides, nitrides and carbides for HER, 18‐22 as well as nanocomposites, transition metal oxides and layered dihydroxygenates for OER 23‐25 …”

Section: Introductionmentioning

confidence: 99%

Design of cobalt‐iron complex sulfides grown on nickel foam modified by reduced graphene oxide as a highly effect bifunctional electrocatalyst for overall water splitting

Zhang

Jiang

et al. 2022

Intl J of Energy Research

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Summary Development of high‐authority and rich‐in‐crust bifunctional electrocatalysts for overall water splitting has a great significance of clean energy storage and conversion with both of the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In this work, cobalt‐iron complex sulfides with the same metal molar ratio firmly grown on the surface of nickel foam modified by reduced graphene oxide (Co0.50Fe0.50S‐rGO@NF) was prepared and acted as a superior electrocatalyst for electrolyzing water. The same mole ratio of bimetallic‐cation doping can induce strong electron‐interaction between the complex sulfides and the surface of nickel foam carrier modified by reduced graphene oxide, which reduces the electronic adsorption energy required for HER and OER, as well as improves the electrocatalytic active area exposure. As a result, the optimal electrocatalyst of Co0.50Fe0.50S‐rGO@NF behaves excellent electrocatalytic performance with the overpotential of 189 mV @ η20 mA·cm−2 in 1.0 M KOH solution for OER and the overpotential of 155 mV @ η10 mA·cm−2 in 0.5 M H2SO4 solution for HER, respectively. A self‐built conventional two‐electrode electrolytic cell by using Co0.50Fe0.50S‐rGO@NF as the anode and cathode presents lower voltages of 1.39 and 1.66 V to deliver the current density of 10 mA·cm−2 in 1.0 M KOH and 1.0 M PBS electrolytes, respectively. This study underlines the synergism of the bimetallic‐cation doping complex sulfides loaded on nickel foam modified by rGO for boosting the electrocatalytic activity of overall water splitting.

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Nanocomposites of Multi-walled Carbon Nanotubes and Titanium dioxide (MWCNTs/TiO2) as affective counter electrode materials for Platinum-free Dye-Sensitized Solar Cells (DSSCs)

Cited by 18 publications

References 15 publications

Enhancing Photovoltaic Performance with BaTiO3/MWCNTs Composite Photoelectrodes in Dye-Sensitized Solar Cells

Enhancing Photovoltaic Performance with BaTiO3/MWCNTs Composite Photoelectrodes in Dye-Sensitized Solar Cells

Fly ash boosted electrocatalytic properties of PEDOT:PSS counter electrodes for the triiodide reduction in dye-sensitized solar cells

Design of cobalt‐iron complex sulfides grown on nickel foam modified by reduced graphene oxide as a highly effect bifunctional electrocatalyst for overall water splitting

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