Use of organic materials in dye-sensitized solar cells

Lee, Chuan‐Pei; Li, Chun Ting; Ho, Keang-Po

doi:10.1016/j.mattod.2017.01.012

Cited by 254 publications

(110 citation statements)

References 137 publications

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“…In these cases, the low Rs of the TCO contributes in bringing the FF up to 70% and 77%, respectively, leading to PCE beyond 9%. Overall, our graphene-based CEs can be used in high-performance TCO/Pt-free DSSCs, which can compete with state-of-the-art DSSCs made with glass/FTO in combination with various kinds of carbonand polymer-based catalysts [245]. This indicates the potential of the CVD-graphene/graphene flakes dualfilms as CEs in DSSCs, providing a viable alternative to be experimented also in the context of flexible devices.…”

Section: Cementioning

confidence: 82%

CVD-graphene/graphene flakes dual-films as advanced DSSC counter electrodes

et al. 2019

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The use of graphene-based electrodes is burgeoning in a wide range of applications, including solar cells, light emitting diodes, touch screens, field-effect transistors, photodetectors, sensors and energy storage systems. The success of such electrodes strongly depends on the implementation of effective production and processing methods for graphene. In this work, we take advantage of two different graphene production methods to design an advanced, conductive oxide-and platinum-free, graphene-based counter electrode for dye-sensitized solar cells (DSSCs). In particular, we exploit the combination of a graphene film, produced by chemical vapor deposition (CVD) (CVD-graphene), with few-layer graphene (FLG) flakes, produced by liquid phase exfoliation. The CVD-graphene is used as charge collector, while the FLG flakes, deposited atop by spray coating, act as catalyst for the reduction of the electrolyte redox couple (i.e., I3 -/I --and Co +2/+3 ). The as-produced counter electrodes are tested in both I3 -/I --and Co +2/+3 -based semitransparent DSSCs, showing power conversion efficiencies of 2.1% and 5.09%, respectively, under 1 SUN illumination. At 0.1 SUN, Co +2/+3 -based DSSCs achieve a power conversion efficiency as high as 6.87%. Our results demonstrate that the electrical, optical, chemical and catalytic properties of graphene-based dual films, designed by combining CVD-graphene and FLG flakes, are effective alternatives to FTO/Pt counter electrodes for DSSCs for both outdoor and indoor applications.

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Section: Cementioning

confidence: 82%

CVD-graphene/graphene flakes dual-films as advanced DSSC counter electrodes

et al. 2019

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“…However, the traditional electrolytes are easy to leak because most of the electrolytes are liquid. Therefore, their safety and long-term stability are limited [91,92]. Replacing the LEs with solid-state hole transport conductors and ILs has been proposed to overcome this issue, but yet resulted in other problems.…”

Section: Low Molecule-mass Organic Gelator-based Gel Electrolytementioning

confidence: 99%

Safety regulation of gel electrolytes in electrochemical energy storage devices

2019

Sci. China Mater.

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Electrochemical energy storage devices, such as lithium ion batteries (LIBs), supercapacitors and fuel cells, have been vigorously developed and widely researched in past decades. However, their safety issues have appealed immense attention. Gel electrolytes (GEs), with a special state in-between liquid and solid electrolytes, are considered as the most promising candidates in electrochemical energy storage because of their high safety and stability. This review summarized the recent progresses made in the application of GEs in the safety regulation of the electrochemical energy storage devices. Special attention was paid to the gel polymer electrolytes, the organic low molecule-mass GEs, as well as the fumed silica-based and siloxane-based GEs. Finally, the current challenges and future directions were proposed in terms of the development of GEs.

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“…The ideal DSSC contains a combination of transparent conductive substrates that are sensitive to dyes, semiconductor films, dyes, electrolytes and electrodes (Husain et al, 2018) such as the DSSC scheme sketch shown in Figure 1. (Lee et al, 2017) In DSSC, dye as a sensitizer plays a key role in absorbing sunlight and converting solar energy into electrical energy (Oviri & Ekpunobi, 2013). Dye has several conditions to be apply to the DSSC, such as the absorption spectrum must cover the entire visible region including the near-infrared region (NIR), the dye must have a holding group to bind it to the semiconductor surface, an oxidation state that is more positive than the redox potential of the electrolyte, the potential of the Highest Occupied Molecular Orbital (HOMO) dye must be positive enough compared to the potential redox electrolyte for efficient dye regeneration, the potential of the lowest Unoccupied Molecular Orbital (LUMO) dye must be negative enough to match the potential edge of the semiconductor conduction band and its orbitals must be placed in the acceptor's lowest dyes to provide efficient electron injection (Hagberg et al, 2017;Husain et al, 2018;Latini, 2018).…”

Section: Introductionmentioning

confidence: 99%

Optical properties of dye DN-F01 as sensitizer

Ramadhani

Supriyanto

Ahmad

et al. 2019

J. Phys.: Theor. Appl.

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Dye-Sensitized Solar Cell (DSSC) is a solar cell made from organic material that works with an electrochemical photo system to convert solar energy into electrical energy. The components of DSSC consist of transparent conductive substrates, dyes, semiconductors, electrolytes and counter electrodes. Dye as a sensitizer is has an important role in DSSC performance improvement. This study aims to obtain optical characterization such as absorbance spectrum and transmittance from DSSC using dye DN-F01 with concentration 2x10 -3 M. Optical characterization has been tested using a UV-VIS Spectrophotometer Shimadzu UV-1800. The test results show that the absorbance spectrum of the dye is at a wavelength of 400-500 nm. Band gap energy of DN-F01 has obtained from its absorbance and transmittance value is about 2,46 eV.

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Use of organic materials in dye-sensitized solar cells

Cited by 254 publications

References 137 publications

CVD-graphene/graphene flakes dual-films as advanced DSSC counter electrodes

CVD-graphene/graphene flakes dual-films as advanced DSSC counter electrodes

Safety regulation of gel electrolytes in electrochemical energy storage devices

Optical properties of dye DN-F01 as sensitizer

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