Efficiency enhancement of flexible dye-sensitized solar cell with sol–gel formed Nb2O5 blocking layer

Cho, Tae-Yeon; Ko, Kwan-Woo; Yoon, Soon‐Gil; Sekhon, S. S.; Kang, Man Gu; Hong, Young-Shick; Han, Chi‐Hwan

doi:10.1016/j.cap.2013.04.012

Cited by 34 publications

(12 citation statements)

References 18 publications

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“…Cho et al investigated the effect of Nb 2 O 5 BL prepared by sol–gel method in flexible DSSC . Significant efficiency improvement from 4.43 to 6.19% was observed after deposition of Nb 2 O 5 BL under optimum gel processing conditions.…”

Section: Photo‐anodementioning

confidence: 99%

Recent advances in photo-anode for dye-sensitized solar cells: a review

2017

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Summary Dye‐sensitized solar cell (DSSC) attracts immense interest in the last few decades due to its various attractive features such as low production cost, ease of fabrication and relatively high conversion efficiency, which make it a strong competitor to the conventional silicon‐based solar cell. In DSSC, photo‐anode performs two important functions, viz. governs the collection and transportation of photo‐excited electrons from dye to external circuit as well as acts as a scaffold layer for dye adsorption. The photo‐anode usually consists of wide band gap semiconducting metal oxides such as titanium dioxide (TiO2) and zinc oxide (ZnO) deposited on the transparent conducting oxide substrates. The morphology and composition of the semiconductor oxides have significant impact on the DSSC photovoltaic performance. Therefore, enormous research efforts have been undertaken to investigate the influences of photo‐anode modifications on DSSC performance. The modifications can be classified into three categories, namely interfacial modification through the introduction of blocking and scattering layer, doping with non‐metallic anions and metallic cations and replacing the conventional mesoporous semiconducting metal oxide films with one‐dimensional or two‐dimensional nanostructures. In the present review, the previously mentioned modifications on photo‐anode are summarized based on the recent findings, with particular emphasis given to published works for the past 5 years. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Photo‐anodementioning

confidence: 99%

Recent advances in photo-anode for dye-sensitized solar cells: a review

2017

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“…Niobium pentoxide (Nb 2 O 5 ) is a ceramic material of great interest in different research fields such as the production of alloys, capacitors, lithium niobate for optical waveguides and modulators, and optical glasses . Moreover, their chemical, physical, optical, and electronic properties make it a promising material in several technological applications, such as catalyst in various types of reactions, electronics, semiconductor element in solar cells, and photocatalytic systems . This oxide is characterized by having the n‐type semiconductor properties with a band gap of ~3.4 eV, low toxicity potential, good chemical and thermal stabilities, surface acidity and high selectivity .…”

Section: Introductionmentioning

confidence: 99%

“…Different methods of synthesis have been reported in the literature for the preparation of nanoparticulate Nb 2 O 5 including sol–gel and hydrolysis processes . However, the preparation of Nb 2 O 5 by colloidal sol–gel method has not received the due attention.…”

Section: Introductionmentioning

confidence: 99%

Colloidal Sol–Gel Synthesis and Photocatalytic Activity of Nanoparticulate Nb₂O₅ Sols

et al. 2016

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A detailed study of a novel synthesis via colloidal sol-gel route for obtaining nanoparticulate Nb 2 O 5 was performed. Parameters such as temperature and H + :Nb 5+ and Nb 5+ :H 2 O molar ratios were controlled in order to determine the best conditions of synthesis. Moreover, particle size distribution, zeta potential, structure by X-ray diffraction, and the photocatalytic activity of the particulate sols were also evaluated. The obtained results indicate that the colloidal sol-gel synthesis is a good alternative for obtaining Nb 2 O 5 either as stable nanoparticulate sol or as a nanosized powder. Nb 2 O 5 amorphous nanoparticles with an average size of 20 nm were obtained by controlling the synthesis variables. The heat-treatment process allowed the formation of Nb 2 O 5 with orthorhombic structure that transforms at higher temperatures to monoclinic phase. The highest photocatalytic activity was observed under k = 365 nm, the smallest UV energy used in the experimental tests.

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“…To date, such Nb 2 O 5 blocking layers have been prepared by spray pyrolysis [9], reactive sputtering [10,11] and the solgel method [12]. The sputtering method offers several advantages over the other methods, including source material diversity, uniform deposition, good reproducibility, compatibility with reactive gases and suitability for large-scale production.…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of a Nb2O5 blocking layer for dye-sensitized solar cells

et al. 2014

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The introduction of a niobium oxide layer between fluorine-doped tin oxide (FTO) and TiO 2 electrodes is known to enhance the power conversion efficiency (η) of dyesensitized solar cells (DSSCs). Nb thin films were deposited on FTO glass substrates using RF magnetron sputtering. TiO 2 pastes were then screen-printed onto the Nb thin films. The multilayered structures were annealed at 500°C in a muffle furnace and assembled with Pt counter electrodes for DSSC performance evaluation. The Nb thin films were oxidized during the calcination process, producing a post-oxidized layer that increased the solar-cell efficiency by about 15 % and the photocurrent density by approximately 25 %.

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Efficiency enhancement of flexible dye-sensitized solar cell with sol–gel formed Nb2O5 blocking layer

Cited by 34 publications

References 18 publications

Recent advances in photo-anode for dye-sensitized solar cells: a review

Recent advances in photo-anode for dye-sensitized solar cells: a review

Colloidal Sol–Gel Synthesis and Photocatalytic Activity of Nanoparticulate Nb₂O₅ Sols

Facile preparation of a Nb2O5 blocking layer for dye-sensitized solar cells

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Efficiency enhancement of flexible dye-sensitized solar cell with sol–gel formed Nb2O5 blocking layer

Cited by 34 publications

References 18 publications

Recent advances in photo-anode for dye-sensitized solar cells: a review

Recent advances in photo-anode for dye-sensitized solar cells: a review

Colloidal Sol–Gel Synthesis and Photocatalytic Activity of Nanoparticulate Nb2O5 Sols

Facile preparation of a Nb2O5 blocking layer for dye-sensitized solar cells

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Colloidal Sol–Gel Synthesis and Photocatalytic Activity of Nanoparticulate Nb₂O₅ Sols