Fabrication and performance of nanoporous TiO2/SnO2 electrodes with a half hollow sphere structure for dye sensitized solar cells

Bak, Yu-Rim; Kim, Gyeong-Ok; Hwang, Moon-Jin; Cho, Kwon-Koo; Kim, Ki-Won; Ryu, Kwang‐Sun

doi:10.1007/s10971-011-2421-z

Cited by 16 publications

(4 citation statements)

References 13 publications

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“…To solve these problems, SnO 2 -TiO 2 core-shell structures have been adopted to combine the advantageous features of the two materials. 7,14,15,17,18 The SnO 2 -TiO 2 core-shell structured DSSCs show higher short-circuit photocurrent density (J sc ) than that of TiO 2 nanoparticle (P25) DSSCs. The contribution of one mole of dye molecules to J sc for SnO 2 -TiO 2 core-shell DSSC is almost three times larger than that of P25 DSSC, indicating an extremely fast and efficient charge collection in SnO 2 -TiO 2 core-shell DSSCs.…”

Section: Introductionmentioning

confidence: 99%

A facile method to prepare SnO2 nanotubes for use in efficient SnO2–TiO2 core–shell dye-sensitized solar cells

et al. 2012

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A high-efficiency photoelectrode for dye-sensitized solar cells (DSSCs) should combine the advantageous features of fast electron transport, slow interfacial electron recombination and large specific surface area. However, these three requirements usually cannot be achieved simultaneously in the present state-of-the-art research. Here we report a simple procedure to combine the three conflicting requirements by using porous SnO(2) nanotube-TiO(2) (SnO(2) NT-TiO(2)) core-shell structured photoanodes for DSSCs. The SnO(2) nanotubes are prepared by electrospinning of polyvinyl pyrrolidone (PVP)/tin dichloride dihydrate (SnCl(2)·2H(2)O) solution followed by direct sintering of the as-spun nanofibers. A possible evolution mechanism is proposed. The power conversion efficiency (PCE) value of the SnO(2) NT-TiO(2) core-shell structured DSSCs (∼5.11%) is above five times higher than that of SnO(2) nanotube (SnO(2) NT) DSSCs (∼0.99%). This PCE value is also higher than that of TiO(2) nanoparticles (P25) DSSCs (∼4.82%), even though the amount of dye molecules adsorbed to the SnO(2) NT-TiO(2) photoanode is less than half of that in the P25 film. This simple procedure provides a new approach to achieve the three conflicting requirements simultaneously, which has been demonstrated as a promising strategy to obtain high-efficiency DSSCs.

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Section: Introductionmentioning

confidence: 99%

A facile method to prepare SnO2 nanotubes for use in efficient SnO2–TiO2 core–shell dye-sensitized solar cells

et al. 2012

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“…Compounds containing Pt and Sn have been used as electrocatalysts for the counter electrodes (CEs) of dyesensitized solar cells (DSSCs) [1][2][3][4][5][6][7][8][9] as well as for applications such as methanol or ethanol oxidation [10], dehydrogenation [11], gas sensing [12][13][14], 3D electrodes [15], supercapacitors [16], and batteries [17]. Pt is commonly used as a catalyst because of its superior stability and catalytic ability.…”

Section: Introductionmentioning

confidence: 99%

Investigation of ultrashort (< 1 min) calcination processes for conversion of Pt–SnOx from mixture of chloroplatinic acid and tin(II) chloride

et al. 2019

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We investigate the ultrashort (< 1 min) calcination process for Pt-SnO x catalysts converted from a mixture solution of chloroplatinic acid and tin(II) chloride in air. An electric furnace is used to test the ultrashort calcination of Pt-SnO x catalysts used as counter electrodes (CEs) of DSSCs. By using a conventional electric furnace instead of an atmospheric pressure plasma jet (Metals 8:690, 2018), the effect of reactive plasma species can be ruled out, and only the bare thermal effect is considered in this study. Scanning electron microscopy reveals that Pt-SnO x nanoparticles are well-distributed on the substrates. X-ray photoelectron spectroscopy indicates the conversion of a large amount of metallic Pt and oxidized Sn. No metallic Pt is observed with 5-s calcination; however, ~ 74% Pt is converted into metallic Pt with 15-s calcination. Further increasing the calcination time does not increase the conversion rate of metallic Pt. By contrast, metallic Sn shows its maximum conversion rate of ~ 18% with 30-s calcination. Further increasing the calcination time to 30 min reduces the metallic Sn content to ~ 6%, possibly owing to Sn re-oxidation. When applying Pt-SnO x catalysts to CEs of DSSCs, the efficiency greatly increases as the calcination time increases from 15 to 30 s. The efficiency remains relatively unchanged for calcination time of 60 s to 30 min. The efficiencies of DSSCs with a Pt-SnO x CE calcined at longer processing times (≥ 60 s) are comparable to those of DSSCs with conventional Pt CEs.

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“…Various synthesis and deposition techniques have been applied in preparing TiO 2 nanostructures, such as sputtering, chemical vapour deposition, spray pyrolysis [1], anodic oxidation [2, 3], hydrothermal synthesis [4], template synthesis, sol–gel fabrication [5] and many more. Each technique produces unique morphologies of the TiO 2 nanostructures, such as nanowire [6], nanofibre [7], nanorods and nanotube arrays [2] to overcome the shape limitation of TiO 2 nanoparticle morphology.…”

Section: Introductionmentioning

confidence: 99%

Morphology, structure, optical property and photoelectrochemical property of TiO ₂ nanoflower films synthesised via liquid phase deposition technique

Rahman

Umar

Roza

et al. 2014

Micro & Nano Letters

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This reported study was concerned with the synthesis of TiO 2 nanoflowers as a photovoltaic material of the photoelectrochemical cell (PEC) via the phase liquid deposition technique. It highlighted the effect of the growth time on the morphology of TiO 2 samples. Three growth times were chosen, namely 2, 4 and 6 h. The morphology was examined by scanning electron microscopy (SEM). The nanoflowers' morphology of the TiO 2 sample grown for 4 h was then chosen to be characterised by cross-sectional SEM, X-ray diffraction, ultraviolet-visible and photoelectrochemical measurement. The sample was crystalline with anatase phase. The sample showed the strongest absorption at 330 nm. The TiO 2 nanoflowers PEC demonstrated the J sc and V oc of 0.046 mAcm −2 and 0.26 V, respectively.

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Fabrication and performance of nanoporous TiO2/SnO2 electrodes with a half hollow sphere structure for dye sensitized solar cells

Cited by 16 publications

References 13 publications

A facile method to prepare SnO2 nanotubes for use in efficient SnO2–TiO2 core–shell dye-sensitized solar cells

A facile method to prepare SnO2 nanotubes for use in efficient SnO2–TiO2 core–shell dye-sensitized solar cells

Investigation of ultrashort (< 1 min) calcination processes for conversion of Pt–SnOx from mixture of chloroplatinic acid and tin(II) chloride

Morphology, structure, optical property and photoelectrochemical property of TiO ₂ nanoflower films synthesised via liquid phase deposition technique

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Fabrication and performance of nanoporous TiO2/SnO2 electrodes with a half hollow sphere structure for dye sensitized solar cells

Cited by 16 publications

References 13 publications

A facile method to prepare SnO2 nanotubes for use in efficient SnO2–TiO2 core–shell dye-sensitized solar cells

A facile method to prepare SnO2 nanotubes for use in efficient SnO2–TiO2 core–shell dye-sensitized solar cells

Investigation of ultrashort (< 1 min) calcination processes for conversion of Pt–SnOx from mixture of chloroplatinic acid and tin(II) chloride

Morphology, structure, optical property and photoelectrochemical property of TiO 2 nanoflower films synthesised via liquid phase deposition technique

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Morphology, structure, optical property and photoelectrochemical property of TiO ₂ nanoflower films synthesised via liquid phase deposition technique