Porous Acetylene-black Spheres as the Cathode Materials of Dye-sensitized Solar Cells

Cai, Fengshi; Xu, Ruifeng

doi:10.1246/cl.2006.1266

Cited by 34 publications

(21 citation statements)

References 20 publications

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“…Likewise, Cai et al used porous acetylene-black (AB) spheres (Figure 3.53), prepared by the pyrolysis of acetylene, as the counter electrode material. [282] The BET specific surface area of the porous spheres was very high (280 m 2 g -1 ) and the R CT at the counter electrode/electrolyte interface was low (7.9 O cm -2 ). A thin AB film with a thickness of 20 mm gave a conversion efficiency of 5.76%.…”

Section: Counter Electrodesmentioning

confidence: 94%

“…Carbon nanotubes have a high longitudinal conductivity and are good triiodide reduction catalysts. [283] Suzuki et al used single-wall carbon nanotube counter electrodes, deposited on both FTO-glass and a Teflon membrane filter, [282] with permission from The Chemical Society of Japan achieving conversion efficiencies of 3.5% and 4.5%, respectively. [284] The sheet resistance of the nanotubes on the Teflon membrane (1.8 O sq -1 ) was four times lower than that of FTO-glass (ca 8-15 O sq -1 ) rendering them an attractive alternative.…”

Section: Counter Electrodesmentioning

confidence: 99%

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Solar Energy Materials

Gibson

Hagfeldt

2011

Energy Materials

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Section: Counter Electrodesmentioning

confidence: 94%

Section: Counter Electrodesmentioning

confidence: 99%

Solar Energy Materials

Gibson

Hagfeldt

2011

Energy Materials

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“…The first arc in the high frequency region of 10 3 -10 5 Hz is attributed to the impedance related to charge-transfer process occurring at the counter electrode/electrolyte interface, while the second arc in the low frequency region of 1-10 3 Hz is attributed to the charge transfer at the photoelectrode/electrolyte interface [13] . It can be seen that the second arc of cell A has a smaller size than that of cell B, reflecting the decrease of the charge transfer resistance at the electrode/electrolyte interface in the cell A [14] . As shown in Fig.5(b), the maximum frequency f max of the low frequency peak for the cell A is 10 Hz, much smaller than that for the cell B (14 Hz).…”

Section: Fig4 Optical Absorption Spectra Of Bare Fto and Fto/ Sno 2 mentioning

confidence: 99%

SnO2 nanosheet as a photoanode interfacial layer for dye-sensitized solar cells

Cai

Wang

Yuan

et al. 2011

Optoelectron. Lett.

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C SnO 2 nanosheet films about 200 nm in thickness are successfully fabricated on fluorine-doped tin oxide (FTO) glass by a facile solution-grown approach. The prepared SnO 2 nanosheet film is applied as an interfacial layer between the nanocrystalline TiO 2 film and the FTO substrate in dye-sensitized solar cells (DSCs). Experimental results show that the introduction of a SnO 2 nanosheet film not only suppresses the electron back-transport reaction at the electrolyte/FTO interface but also provides an efficient electron transition channel along the SnO 2 nanosheets, and as a result, increasing the open circuit voltage and short current density, and finally improving the conversion efficiency for the DSCs from 3.89% to 4.62%.Dye-sensitized solar cells (DSCs) [1] as high cost-effective photovoltaic solar cells have attracted more and more attention. Generally, DSCs consist of a porous TiO 2 film sensitized by dyes on a transparent conductive glass (TCO), an electrolyte, and a counter electrode. As a key part of DSCs, the porous TiO 2 film takes the function of dye absorption and electron transport from the point of generation to the collection electrode [2] . However, the charge recombination at the interface between the TCO and the electrolyte still remains one of the major energy-wasting pathways [3,4] . Therefore, controlling the interface is not only crucial for the formation of efficient DSCs but also a hot topic in other photovoltaic devices [5,6] . In order to improve the performance of DSCs, coating a compact TiO 2 buffer layer on the TCO has been adopted to prevent the electron transfer from the TCO to the I -/I 3 -redox couple [7] . Recently, SnO 2 has attracted considerable interest for DSC applications because of its distinct advantages over the traditional TiO 2 in terms of high electron mobility (~100-200 cm 2 V -1 s -1 ) [8] , suggesting a faster diffusion transport of photoinduced electrons in SnO 2 , and wide band gap (3.6 eV), which would facilitate the long-term stability of DSCs due to * creating fewer oxidative holes in the valence band [9] . Here, we report the preparation of a SnO 2 nanosheet film by a facile solution-grown method and the promising properties of SnO 2 nanosheet as the interfacial layer of DSCs.The structure of a dye-sensitized solar cell (DSC) is shown in Fig.1.SnO 2 nanosheet films are prepared by immersing the fluorine-doped tin oxide glass (FTO) (sheet resistance of 15 per square, Nippon sheet glass) or the glass substrate in solu- (a)

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“…The preparation of AB powder was described in Ref. [13]. The conductivity of the acetylene film is 0.6 S cm −1 .…”

Section: Preparation Of Ab Pt Pt/ab Pt/tio 2 Counter Electrodementioning

confidence: 99%

Low-Pt-loading acetylene-black cathode for high-efficient dye-sensitized solar cells

Cai

Liang

Tao

et al. 2008

Journal of Power Sources

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Porous Acetylene-black Spheres as the Cathode Materials of Dye-sensitized Solar Cells

Abstract: Porous acetylene-black (AB) spheres were used as the cathode materials of dye-sensitized solar cells (DSC), showing low-cost, high electrochemical activity and energy-conversion efficiency (5.76%), indicating the potential replacement of noble-metal Pt in the cathode of DSC.

Cited by 34 publications

References 20 publications

Solar Energy Materials

Solar Energy Materials

SnO2 nanosheet as a photoanode interfacial layer for dye-sensitized solar cells

Low-Pt-loading acetylene-black cathode for high-efficient dye-sensitized solar cells

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