Rapid fabrication and photovoltaic performance of Pt-free carbon nanotube counter electrodes of dye-sensitized solar cells

Luo, Xiuting; Ahn, Ji Young; Park, Young Su; Kim, Jong Man; Lee, Hyung Woo; Kim, Sung Hyun

doi:10.1016/j.solener.2017.04.029

Cited by 22 publications

(6 citation statements)

References 34 publications

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“…Carbon nanotubes (CNT) are the subject of intense scientific research because of their exceptional set of physical properties, including ultrahigh stiffness, excellent carrier mobility, and structural control of their electronic band structure. CNT combine unique nanostructure with excellent mechanical and electronic properties, and have shown promising applications in several fields, as transistors [1,2], photovoltaic devices [3,4], supercapacitors [5,6].…”

Section: Introductionmentioning

confidence: 99%

Electronic properties of carbon nanotubes as detected by photoemission and inverse photoemission

Soncini

Bondino²,

Magnano³

et al. 2020

Nanotechnology

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The relation between morphology and energy level alignment in carbon nanotubes (CNT) is a crucial information for the optimization of applications in nanoelectronics, optics, mechanics and (bio)chemistry. Here we present a study of the relation between the electronic properties and the morphology of single wall CNT (SWCNT), aligned multi wall CNT (MWCNT) and unaligned MWCNT. The CNT were synthesized via catalytic chemical vapor deposition in ultra-high vacuum conditions. Combined ultraviolet photoemission and inverse photoemission (IPES) spectra reveal a high sensitivity to the nanotube morphology. In the case of unaligned SWCNT the distinctive unoccupied Van Hove singularities (vHs) features are observed in the high resolution IPES spectra. Those features are assigned to semiconducting and metallic SWCNT states, according to calculated vHs DOS. The two MWCNT samples are similar in the diameter of the tube (about 15 nm) and present similar filled and empty electronic states, although the measured features in the aligned MWCNT are more defined. Noteworthy, interlayer states are also revealed. Their intensities are directly related to the MWCNT alignment. Focussing and geometrical effects associated to the MWCNT alignment are discussed to account the spectral differences.

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Section: Introductionmentioning

confidence: 99%

Electronic properties of carbon nanotubes as detected by photoemission and inverse photoemission

Soncini

Bondino²,

Magnano³

et al. 2020

Nanotechnology

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“…The Kim group prepared MWCNTs via a spin‐coating method for use as the CE in a DSC . The authors found that the MWCNT film thickness affected the catalytic activity strongly.…”

Section: Carbon Counter Electrode In the Dye‐sensitized Solar Cellmentioning

confidence: 99%

Carbon Counter Electrodes in Dye‐Sensitized and Perovskite Solar Cells

Sun

Zhou

et al. 2019

Adv Funct Materials

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Developing highly effective and stable counter electrode (CE) materials to replace rare and expensive noble metals for dye‐sensitized and perovskite solar cells (DSC and PSC) is a research hotspot. Carbon materials are identified as the most qualified noble metal‐free CEs for the commercialization of the two photovoltaic devices due to their merits of low cost, excellent activity, and superior stability. Herein, carbonaceous CE materials are reviewed extensively with respect to the two devices. For DSC, a classified discussion according to the morphology is presented because electrode properties are closely related to the specific porosity or nanostructure of carbon materials. The pivotal factors influencing the catalytic behavior of carbon CEs are also discussed. For PSC, an overview of the new carbon CE materials is addressed comprehensively. Moreover, the modification techniques to improve the interfacial contact between the perovskite and carbon layers, aiming to enhance the photovoltaic performance, are also demonstrated. Finally, the development directions, main challenges, and coping approaches with respect to the carbon CE in DSC and PSC are stated.

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“…In recent years, researchers have tried their best to screen Pt-free counter electrode for DSSCs by developing new materials or compositing different materials together, such as conducting polymers, [11][12][13] carbon materials, [14][15][16][17] transition metal carbides, [18,19] sulfides, [20,21] nitrides, [22,23] and oxides. [24,25] Among them, carbonaceous materials are promising candidate for DSSCs thanks to their high conductivity, superior resistance to oxidation and corrosion of electrolytes, and excellent electrochemical stability, all of which largely satisfy the actual needs of DSSCs.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Heteromorphic Ni Decorated Fe‐Containing Carbon Nanofibers as Efficient and Low‐Cost Counter Electrodes for Dye‐Sensitized Solar Cells

et al. 2022

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In the field of dye‐sensitized solar cells (DSSCs), although Pt is commonly used as counter electrode materials owing to its great electrocatalytic activity and conductivity, the high price and small reserves of Pt limit its large‐scale application. In this paper, heteromorphic Ni decorated Fe‐containing carbon nanofibers (Ni/NiO@Fe‐CNFs) was prepared by a thermal synthesis method, and applied as composite counter electrode materials for DSSCs. It was found that the as‐synthesized Ni/NiO@Fe‐CNFs shows better electrocatalytic activity than that of Fe‐CNFs and CNFs for the reduction reaction of triiodide to iodide. The improved electrocatalytic activity is not only attributed to the introduction of Fe2O3 to form Fe‐CNFs, but also attributed to the heteromorphic Ni decoration and their synergistic effect. The photoelectric conversion efficiency of DSSCs with Ni/NiO@Fe‐CNFs counter electrode is 4.81 %, much higher than that of CNFs (0.62 %) and Fe‐CNFs counter electrode (3.65 %), and comparable to the value of Pt counter electrode (5.10 %). Accordingly, the Ni/NiO@Fe‐CNFs is expected to be a potential counter electrode material to replace Pt.

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Rapid fabrication and photovoltaic performance of Pt-free carbon nanotube counter electrodes of dye-sensitized solar cells

Cited by 22 publications

References 34 publications

Electronic properties of carbon nanotubes as detected by photoemission and inverse photoemission

Electronic properties of carbon nanotubes as detected by photoemission and inverse photoemission

Carbon Counter Electrodes in Dye‐Sensitized and Perovskite Solar Cells

Preparation of Heteromorphic Ni Decorated Fe‐Containing Carbon Nanofibers as Efficient and Low‐Cost Counter Electrodes for Dye‐Sensitized Solar Cells

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