Improved Energy Conversion Efficiency of Dye-sensitized Solar Cells Fabricated using Open-ended TiO<sub>2</sub>Nanotube Arrays with Scattering Layer

Rho, Won‐Yeop; Chun, Myeoung-Hwan; Kim, Ho-Sub; Hahn, Yoon‐Bong; Suh, Jin Soo; Jun, Bong‐Hyun

doi:10.5012/bkcs.2014.35.4.1165

Cited by 11 publications

(7 citation statements)

References 25 publications

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“…However, when the levels of thickness were compared, the bottom wall (~35 nm) was much thicker than the top wall of the freestanding TiO 2 nanotube arrays. In previous works [ 18 , 25 , 26 , 27 , 28 , 29 , 30 ], we reported that the shape of TiO 2 nanotube arrays prepared by anodization were likely to be a corn shape type and that the thicker bottom layer disturbed the electron transport and electrolyte diffusion. Therefore, we suggested that the removal of the bottom layer would facilitate better energy conversion efficiency in DSSCs.…”

Section: Resultsmentioning

confidence: 96%

Enhanced Efficiency in Dye-Sensitized Solar Cells by Electron Transport and Light Scattering on Freestanding TiO2 Nanotube Arrays

et al. 2017

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Dye-sensitized solar cells (DSSCs) were fabricated with closed- or open-ended freestanding TiO2 nanotube arrays as photoelectrodes that were decorated with carbon materials and large TiO2 nanoparticles (NPs) to enhance energy conversion efficiency. The energy conversion efficiency of DSSCs based on open-ended freestanding TiO2 nanotube arrays increased from 4.47% to 5.39%, compared to the DSSCs based on closed-ended freestanding TiO2 nanotube arrays. In DSSCs based on the open-ended freestanding TiO2 nanotube arrays, the energy conversion efficiency with carbon materials increased from 5.39% to 6.19% due to better electron transport, and that with a scattering layer from 5.39% to 6.24% due to more light harvesting compared to the DSSCs without carbon materials or scattering layer. Moreover, the energy conversion efficiency of DSSCs based on the open-ended freestanding TiO2 nanotube arrays with both carbon materials and scattering layer increased from 5.39% to 6.98%, which is an enhancement of 29.50%. In DSSCs based on the TiO2 nanotube arrays, the carbon materials can improve electron transport by π-π conjugation, and the large TiO2 NPs can enhance the capacity to light-harvest by scattering.

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Section: Resultsmentioning

confidence: 96%

Enhanced Efficiency in Dye-Sensitized Solar Cells by Electron Transport and Light Scattering on Freestanding TiO2 Nanotube Arrays

et al. 2017

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“…However, by using a physical method such as ion milling, the barrier layer can be removed without any damage to the TNTAs. 27 To increase the ECE in the DSSCs, the barrier layer of the freestanding TNTAs was removed by an ion milling method. The resulting TNTAs are called “open-ended freestanding TNTAs” and are shown in Figure 1c.…”

Section: Resultsmentioning

confidence: 99%

Au-Nanoparticle-Embedded Open-Ended Freestanding TiO₂ Nanotube Arrays in Dye-Sensitized Solar Cells for Better Electron Generation and Electron Transport

2019

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Freestanding TiO2 nanotube arrays (TNTAs) were prepared by an electrochemical method, and dye-sensitized solar cells (DSSCs) were fabricated with the open-ended freestanding TNTAs incorporated with Au nanoparticles (NPs). Open-ended freestanding TNTAs were prepared by etching the barrier layer of closed-ended freestanding TNTAs using an ion milling method, and Au NPs were incorporated into the channel of the open-ended freestanding TNTAs by an electrodeposition method. The Au-NP-embedded open-ended freestanding TNTAs were applied to DSSCs to improve the energy conversion efficiency (ECE) by better electron generation and electron transport. The ECE of DSSCs based on the closed-ended freestanding TNTAs with Au NPs increased to 6.116% from 5.502% for DSSCs based on the closed-ended freestanding TNTAs without Au NPs, an enhancement of 11.16% because of better electron generation by the plasmonic and charging effects of the Au NPs. However, the ECE of DSSCs based on the closed-ended freestanding TNTAs incorporated with Au NPs for 40 s decreased from 6.116 to 5.336% because aggregation of the Au NPs led to a decrease in the open-circuit voltage (Voc) and fill factor. For enhanced ECE of DSSCs, the barrier layer of closed-ended freestanding TNTAs was etched by an ion milling method for 0, 30, 60, or 90 min to provide “open-ended freestanding TNTAs”. Then, Au NPs were incorporated into the open-ended freestanding TNTAs. After the barrier layer was completely removed by the ion milling method for 90 min, the ECE of the DSSCs reached 7.120% because the electron transport and electrolyte diffusion were improved by the elimination of the barrier layer of the freestanding TNTAs.

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“…The sintered layers were then immersed in 40 mM of TiCl 4 aqueous solution at 70 °C for 30 min and sintered again at 500° C for 40 min to obtain the TiO 2 reflector layer and to increase the surface area of the TiO 2 layer. So it will be able to improve the absorption of the dye and implies the optimization of the light harvesting [13].…”

Section: A Materialsmentioning

confidence: 99%

Analysis of Thermal Treatment Zirconia as Spacer Layer on Dye-Sensitized Solar Cell (DSSC) Performance with Monolithic Structure

Anwar

Rosa

Shobih

et al. 2018

indones.j.electron.telecommun.

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Monolithic dye-sensitized solar cells (DSSC) offer the prospect of lower material cost and require a simpler manufacturing process compared with conventional DSSC. Fabricated on a single fluorine tin oxide (FTO) glass substrate consists of a nanoporous TiO2 photoanode layer, a ZrO2 spacer layer, a carbon counter electrode layer, a dye, and an electrolyte. The spacer layer on the monolithic DSSC serves as electrolyte storage and insulating layer to separate between photoanode and counter electrode. Zirconia is often used as a spacer because it has high temperature resistant properties, high dielectric constant and adhesive as an insulator that has band gap between 5-6 eV. The effects of the thermal treatment of zirconia layer as a spacer electrolyte on the performance of monolithic DSSC have been investigated. The cell’s performance increases with the sintering temperature as well as indicated by the decreased in particle size and increased in quantum efficiency in the absorption region of the titania layer. Co-sintering treatment tends to drastically reduce cell’s performance. The highest performance was obtained at a temperature sintering of 500o C with an PCE of 0.22%, Isc = 0.16 mA and Voc = 0.71 V.

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Improved Energy Conversion Efficiency of Dye-sensitized Solar Cells Fabricated using Open-ended TiO₂Nanotube Arrays with Scattering Layer

Cited by 11 publications

References 25 publications

Enhanced Efficiency in Dye-Sensitized Solar Cells by Electron Transport and Light Scattering on Freestanding TiO2 Nanotube Arrays

Enhanced Efficiency in Dye-Sensitized Solar Cells by Electron Transport and Light Scattering on Freestanding TiO2 Nanotube Arrays

Au-Nanoparticle-Embedded Open-Ended Freestanding TiO₂ Nanotube Arrays in Dye-Sensitized Solar Cells for Better Electron Generation and Electron Transport

Analysis of Thermal Treatment Zirconia as Spacer Layer on Dye-Sensitized Solar Cell (DSSC) Performance with Monolithic Structure

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Improved Energy Conversion Efficiency of Dye-sensitized Solar Cells Fabricated using Open-ended TiO2Nanotube Arrays with Scattering Layer

Cited by 11 publications

References 25 publications

Enhanced Efficiency in Dye-Sensitized Solar Cells by Electron Transport and Light Scattering on Freestanding TiO2 Nanotube Arrays

Enhanced Efficiency in Dye-Sensitized Solar Cells by Electron Transport and Light Scattering on Freestanding TiO2 Nanotube Arrays

Au-Nanoparticle-Embedded Open-Ended Freestanding TiO2 Nanotube Arrays in Dye-Sensitized Solar Cells for Better Electron Generation and Electron Transport

Analysis of Thermal Treatment Zirconia as Spacer Layer on Dye-Sensitized Solar Cell (DSSC) Performance with Monolithic Structure

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Improved Energy Conversion Efficiency of Dye-sensitized Solar Cells Fabricated using Open-ended TiO₂Nanotube Arrays with Scattering Layer

Au-Nanoparticle-Embedded Open-Ended Freestanding TiO₂ Nanotube Arrays in Dye-Sensitized Solar Cells for Better Electron Generation and Electron Transport