Synthesis and performance of La2O3@MWCNT composite materials as Pt-free counter electrodes for dye-sensitized solar cells

Wu, Kezhong; Jie, Zhao; Xiong, Yi; Ruan, Bei; Wu, Mingxing

doi:10.1007/s11581-018-2549-8

Cited by 11 publications

(6 citation statements)

References 33 publications

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“…In addition, the thicknesses of the various SCP/MWCNTs composite electrodes were around 20–25 μm, as shown in Figure S9, Supporting Information, which should have no obvious influence on the electrochemical performance of these electrodes. It was also found that DSSCs with pure MWCNTs cathode displayed a PCE of 3.71%, which was comparable with the results reported in the literature (2.69%, 2.87%, and 3.94%) . It indicates that the commercial MWCNTs without any special treatment should not be a high‐performance electrocatalyst for IRR.…”

Section: Resultssupporting

confidence: 87%

“…It was also found that DSSCs with pure MWCNTs cathode displayed a PCE of 3.71%, which was comparable with the results reported in the literature (2.69%, 2.87%, and 3.94%). [45][46][47][48] It indicates that the www.advancedsciencenews.com www.solar-rrl.com commercial MWCNTs without any special treatment should not be a high-performance electrocatalyst for IRR. The combination of perovskite and carbon material greatly enhanced the IRR activity as compared with the individual component, which can be assigned to the fact that perovskite oxide provided the active sites for IRR and the carbon material served as a highly conductive substrate as demonstrated in our previous study.…”

Section: Resultsmentioning

confidence: 99%

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An Intrinsically Conductive Phosphorus‐Doped Perovskite Oxide as a New Cathode for High‐Performance Dye‐Sensitized Solar Cells by Providing Internal Conducting Pathways

Wang

Liu

et al. 2019

Solar RRL

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State‐of‐the‐art dye‐sensitized solar cells (DSSCs) usually use the noble and scarce platinum (Pt) cathode, which strongly limits the practical applications of DSSCs. Accordingly, low‐cost, highly active, and stable alternatives to Pt are highly desired. Herein, an intrinsically conductive perovskite oxide is reported as a new cathode for DSSCs using a simple nonmetal element doping strategy. The phosphorus‐doped perovskite oxide (SrCo0.95P0.05O3−δ [SCP]) shows superior activity/durability for the triiodide (I3−) reduction reaction (IRR) and structural stability relative to the parent compound (SrCoO3−δ [SC]) due to the greatly enhanced electrical conductivity and the stabilization of the perovskite structure. The internal conducting pathways are demonstrated to be very important to obtain high IRR activity of the perovskite cathode, even when the cathode is incorporated with conductive multiwalled carbon nanotubes (MWCNTs). The DSSC with the N719 dye and SCP/MWCNTs cathode displays a superior power conversion efficiency (PCE) of 10.1% to those with Pt (8.11%) and SC/MWCNTs (6.80%) cathodes. In addition, the DSSC with the C101 dye and SCP/MWCNTs cathode shows an attractive PCE of 12.2% with an enhancement of 23%, as compared with the Pt cathode, suggesting that the SCP/MWCNTs composite can be one of the best substitutions to the Pt cathode, which can benefit the future industrialization of DSSCs.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

An Intrinsically Conductive Phosphorus‐Doped Perovskite Oxide as a New Cathode for High‐Performance Dye‐Sensitized Solar Cells by Providing Internal Conducting Pathways

Wang

Liu

et al. 2019

Solar RRL

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“…Comparing the five different V x A 1– x ( x = 0–1, A = C, O) catalysts, the VC/V 2 O 3 (900 °C) composite has shown the lowest Δ E p and the maximum I P in the CV profiles and the highest J 0 value in the Tafel polarization curves, and R ct from EIS is also lower than that of other composites, which indicates a higher catalytic activity. In theory, R ct is inversely proportional to J 0 . The most significant difference was observed in the largest J sc and V oc of VC/V 2 O 3 (900 °C) CEs from J – V curves.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of V_xA_1–x(x = 0–1, A= C, O) Multiphase Composites Derived from Polyoxovanadate Precursors by Pyrolysis along a Temperature Gradient as Pt-free Counter Electrodes for High-Efficient Dye-Sensitized Solar Cells

Liu

et al. 2021

J. Phys. Chem. C

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Replacing precious Pt-based counter electrodes (CEs) with a low-cost and high-performance Pt-free catalyst of CEs is still in urgent need to decrease the fabrication cost of dye-sensitized solar cells (DSSCs). Herein, the elements V and A (A = C, O) of the final state of the target materials are prefabricated in an organic complex precursor by bonding, and then, the precursor was directly processed to prepare V x A1–x (x = 0–1, A = C, O) multiphase CE catalysts by pyrolysis along the temperature gradient under N2 flow, which further served as catalytic materials of CEs for the encapsulation of DSSCs. The precursors were obtained utilizing polyoxovanadate (NH4)2V6O16 as a metal source and glucose as a carbon source via a facile hydrothermal method. Power conversion efficiencies of 5.38, 6.29, 6.60, 6.82, and 6.23% were obtained from the five different V x A1–x (x = 0–1, A = C, O) multiphase CE catalysts as CEs to reduce iodide/triiodide in DSSCs, which were prepared at pyrolysis temperatures of 600, 700, 800, 900, and 1000 °C, respectively. The enhanced performance of V x A1–x materials can be attributed to the more catalytic active site number and the high conductivity, which is due to the higher specific surface area provided by the pyrolysis and carbonization of glucose and the activation and modification of materials at high temperature and N-doping. The impressive finding in this work indicates that the V x A1–x composite can be considered as a promising candidate for low-cost and high-efficient CEs in the fabrication of DSSCs.

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“…was achieved when the La2O3-MWCNTs ratio was kept at 5:1. The PCE of all the prepared composites was higher than the one showed by the Pt based electrode (4.54%) [213]. The synthesis of a CE based on the composite of MWCNTs and NiO using a hydrothermal method was performed by Al-bahrani et al [214] (see Fig.…”

Section: Tai Et Al Fabricated Mwcnts-mos2mentioning

confidence: 98%

Counter electrode materials based on carbon nanotubes for dye-sensitized solar cells

Shahzad

Lutfullah

Perveen

et al. 2022

Renewable and Sustainable Energy Reviews

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Synthesis and performance of La2O3@MWCNT composite materials as Pt-free counter electrodes for dye-sensitized solar cells

Cited by 11 publications

References 33 publications

An Intrinsically Conductive Phosphorus‐Doped Perovskite Oxide as a New Cathode for High‐Performance Dye‐Sensitized Solar Cells by Providing Internal Conducting Pathways

An Intrinsically Conductive Phosphorus‐Doped Perovskite Oxide as a New Cathode for High‐Performance Dye‐Sensitized Solar Cells by Providing Internal Conducting Pathways

Facile Synthesis of V_xA_1–x(x = 0–1, A= C, O) Multiphase Composites Derived from Polyoxovanadate Precursors by Pyrolysis along a Temperature Gradient as Pt-free Counter Electrodes for High-Efficient Dye-Sensitized Solar Cells

Counter electrode materials based on carbon nanotubes for dye-sensitized solar cells

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Synthesis and performance of La2O3@MWCNT composite materials as Pt-free counter electrodes for dye-sensitized solar cells

Cited by 11 publications

References 33 publications

An Intrinsically Conductive Phosphorus‐Doped Perovskite Oxide as a New Cathode for High‐Performance Dye‐Sensitized Solar Cells by Providing Internal Conducting Pathways

An Intrinsically Conductive Phosphorus‐Doped Perovskite Oxide as a New Cathode for High‐Performance Dye‐Sensitized Solar Cells by Providing Internal Conducting Pathways

Facile Synthesis of VxA1–x(x = 0–1, A= C, O) Multiphase Composites Derived from Polyoxovanadate Precursors by Pyrolysis along a Temperature Gradient as Pt-free Counter Electrodes for High-Efficient Dye-Sensitized Solar Cells

Counter electrode materials based on carbon nanotubes for dye-sensitized solar cells

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Product

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About

Facile Synthesis of V_xA_1–x(x = 0–1, A= C, O) Multiphase Composites Derived from Polyoxovanadate Precursors by Pyrolysis along a Temperature Gradient as Pt-free Counter Electrodes for High-Efficient Dye-Sensitized Solar Cells