TiO2 sol–gel blocking layers for dye-sensitized solar cells

Hart, Judy N.; Menzies, David Brian; Cheng, Yi‐Bing; Simon, George P; Spiccia, Leone

doi:10.1016/j.crci.2005.02.052

Cited by 111 publications

(80 citation statements)

References 6 publications

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“…This compact layer is much denser than the TiO 2 layer; therefore, it can reduce the contact surface area for bare FTO sites and the redox electrolyte (so-called blocking effect). Semiconductors, such as TiO 2 [15][16][17], Nb 2 O 5 [18], ZnO [19] and some insulating materials, such as CaCO 3 [20] and BaCO 3 [21], have been used as a blocking layer for the fabrication of DSSCs. Among them, the compact TiO 2 layer is the most suitable candidate as the blocking layer and has been investigated most frequently.…”

Section: Introductionmentioning

confidence: 99%

An efficient and low-cost TiO2 compact layer for performance improvement of dye-sensitized solar cells

Zhang

Zhao

et al. 2009

Electrochimica Acta

339

163

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a b s t r a c tA TiO 2 organic sol was synthesised for the preparation of a compact TiO 2 layer on fluorine-doped tin oxide (FTO) glass by a dip-coating technique. The resultant thin film was used for the fabrication of dyesensitized solar cells (DSSCs). The compact layer typically has a thickness of ca. 110 nm as indicated by its SEM, and consists of anatase as confirmed by the XRD pattern. Compared with the traditional DSSCs without this compact layer, the solar energy-to-electricity conversion efficiency, short-circuit current and open-circuit potential of the DSSCs with the compact layer were improved by 33.3%, 20.3%, and 10.2%, respectively. This can be attributed to the merits brought by the compact layer. It can effectively improve adherence of TiO 2 to FTO surface, provide a larger TiO 2 /FTO contact area, and reduce the electron recombination by blocking the direct contact between the redox electrolyte and the conductive FTO surface.Crown

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Section: Introductionmentioning

confidence: 99%

An efficient and low-cost TiO2 compact layer for performance improvement of dye-sensitized solar cells

Zhang

Zhao

et al. 2009

Electrochimica Acta

339

163

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“…그러나 금속전극을 도입할 경 우, 전해질의 유입이 용이하도록 다공질 혹은 메쉬 형태의 전극 구조가 용이하며, 전극표면과 전해질 사이의 불필요한 화학반응이나 역 전자전달 반응(Back electron transfer reaction)과 같은 셀 성능을 저하시키는 요인에 대한 대책이 요구된다 [8]. 구체적인 해결방안으로써, 다공질 혹은 메쉬 구 조의 금속전극을 도입하거나 [9,10], 전극표면에 산화물 층을 형성시켜 주위의 전해질로부터 전자가 유입되는 것을 차단 하는 방안 등이 모색되고 있다 [11]. 하지만 금속과 산화물 Table 1 Metal mesh electrode and membrane material.…”

Section: 서 론unclassified

Efficiency Improvement of Metal-Mesh Electrode Type Photoelectrochemical Cells by Oxides Layer Coatings

한치환¹,

박선희²,

성열문³

2011

The Transactions of The Korean Institute of Electrical Engineer

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-In this work, the TiO2 and SnO2 thin films as blocking layers were coated directly onto the metal-mesh electrode surface to prevent unnecessary inflow of back-transfer electrons from the electrolyte (I -/I3 -) to the metal-mesh electrode. The DSCs were fabricated with working electrode of SUS mesh coated with blocking TiO2 and SnO2 layers, dye-attached mesoporous TiO2 film, gel electrolyte and counter electrode of Pt-deposited F:SnO2. From the experimental result, it was ascertained that the efficiency of metal electrode coated with TiO2 by Dip-coating was superior to that of metal electrode coated with SnO2 by Dip-coating and screen printing with the results of experiments. The photo-current conversion efficiency of the cell obtained from optimum fabrication condition was 3% (

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“…The glass plates with the ITO transparent electrode were dip-coated 3 times with the S0 and then heated at 500ºC for 30 min in order to prepare the anatase-type titania electrodes. This layer plays the role as a blocking layer in order to suppress the charge recombination at the interface between the upper layer and the ITO layer (Cameron and Peter, 2003;Hart et al, 2006;Patrocinio et al, 2009). These electrodes were dip-coated 5 times with the S0 containing 0%, 0.10%, 1.0%, and 10% allophane and then steam-treated at 100°C for 120 min.…”

Section: Sample Preparationmentioning

confidence: 99%

Photoelectrochemical properties of dye-dispersing allophane–titania composite electrodes

Nishikiori

Kanada

Setiawan

et al. 2015

Applied Clay Science

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Dye-dispersing allophane-titania composite electrodes were prepared from titanium alkoxide sols containing dye and allophane. The photoelectric conversion properties of the electrodes were investigated by photoelectrochemical measurements. The photocurrent values in the UV range decreased with an increase in the allophane content, whereas those in the visible range were increased by adding 1.0% (Al/Ti ratio) allophane. As a small amount of allophane nanoparticles were highly dispersed in the titania electrodes, the dye molecules were dispersed in the electrodes without decreasing the efficiency of the electron injection from the dye to the titania conduction band. The dye molecules dispersed on the titania nanoparticle surface were capped with allophane nanoparticles which prevented desorption. The dye molecules strongly interacted with the titania nanoparticle surface and efficiently injected the excited electrons into the titania conduction band.

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TiO2 sol–gel blocking layers for dye-sensitized solar cells

Cited by 111 publications

References 6 publications

An efficient and low-cost TiO2 compact layer for performance improvement of dye-sensitized solar cells

An efficient and low-cost TiO2 compact layer for performance improvement of dye-sensitized solar cells

Efficiency Improvement of Metal-Mesh Electrode Type Photoelectrochemical Cells by Oxides Layer Coatings

Photoelectrochemical properties of dye-dispersing allophane–titania composite electrodes

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