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Ultrafast Fabrication of Flexible Dye-Sensitized Solar Cells by Ultrasonic Spray-Coating Technology.

Han HG, Weerasinghe HC, Min Kim K, Soo Kim J, Cheng YB, Jones DJ, Holmes AB, Kwon TH - Sci Rep (2015)

Bottom Line: This study investigates novel deposition techniques for the preparation of TiO2 electrodes for use in flexible dye-sensitized solar cells.These proposed new methods, namely pre-dye-coating and codeposition ultrasonic spraying, eliminate the conventional need for time-consuming processes such as dye soaking and high-temperature sintering.Power conversion efficiencies of over 4.0% were achieved with electrodes prepared on flexible polymer substrates using this new deposition technology and N719 dye as a sensitizer.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, School of Natural Science, Ulsan National Institute of Science and Technology, Ulsan, 689-798, Republic of Korea.

ABSTRACT
This study investigates novel deposition techniques for the preparation of TiO2 electrodes for use in flexible dye-sensitized solar cells. These proposed new methods, namely pre-dye-coating and codeposition ultrasonic spraying, eliminate the conventional need for time-consuming processes such as dye soaking and high-temperature sintering. Power conversion efficiencies of over 4.0% were achieved with electrodes prepared on flexible polymer substrates using this new deposition technology and N719 dye as a sensitizer.

No MeSH data available.


Related in: MedlinePlus

I–V characteristics of a flexible DSC prepared using pre-dye-coating spray technology with N719 dye on TiO2 and codeposition spray technology with N719 dye on TiO2 electrodes.Each inset shows the incident-photon-to-current conversion efficiency.
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f4: I–V characteristics of a flexible DSC prepared using pre-dye-coating spray technology with N719 dye on TiO2 and codeposition spray technology with N719 dye on TiO2 electrodes.Each inset shows the incident-photon-to-current conversion efficiency.

Mentions: To optimize and control the film thickness produced by ultrasonic spray coating deposition, electrodes of different thicknesses were prepared by changing the number of deposition layers. Following CIP compression, this resulted in values of 2, 4, 6, 8, 10, and 18 μm. The structure of these isostatically compressed electrodes was found, through scanning electron microscopy (SEM) to be highly compact, and much unlike the unpressed films (Figure S3). In addition, the images of the dye-coated electrodes before and after CIP shown in Fig. 2 reveal that the transparency of the TiO2 electrodes is enhanced by CIP, which is consistent with previously reported results4. This is also true in the case of the inter-particle connectivity between TiO2 nanoparticles, as evident in the electrodes prepared by codeposition (Figure S4). The PCE of the aforementioned DSC devices was found to increase from 2 to 3.4% when the TiO2 film thickness was increased from 3 to 10 μm, but decreased beyond this point, suggesting that the optimal film thickness lies somewhere within the range of 8–10 μm. Similar results are also observed with both conventional soaking and codeposition processes in Fig. 3. An optimized DSC device with pre-dye-coated TiO2 electrodes resulted in a PCE of 4.1% at an open-circuit voltage (Voc) of 620 mV, short-circuit current (Jsc) of 11.2 mA/cm2, and ff of 0.58. Figure 4 shows the corresponding I–V characteristics of this optimized device, with its incident photon-to-current conversion efficiency (IPCE) spectra shown in Fig. 4(a) inset. Note that its maximum IPCE reaches 48% at a wavelength of 525 nm.


Ultrafast Fabrication of Flexible Dye-Sensitized Solar Cells by Ultrasonic Spray-Coating Technology.

Han HG, Weerasinghe HC, Min Kim K, Soo Kim J, Cheng YB, Jones DJ, Holmes AB, Kwon TH - Sci Rep (2015)

I–V characteristics of a flexible DSC prepared using pre-dye-coating spray technology with N719 dye on TiO2 and codeposition spray technology with N719 dye on TiO2 electrodes.Each inset shows the incident-photon-to-current conversion efficiency.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4588502&req=5

f4: I–V characteristics of a flexible DSC prepared using pre-dye-coating spray technology with N719 dye on TiO2 and codeposition spray technology with N719 dye on TiO2 electrodes.Each inset shows the incident-photon-to-current conversion efficiency.
Mentions: To optimize and control the film thickness produced by ultrasonic spray coating deposition, electrodes of different thicknesses were prepared by changing the number of deposition layers. Following CIP compression, this resulted in values of 2, 4, 6, 8, 10, and 18 μm. The structure of these isostatically compressed electrodes was found, through scanning electron microscopy (SEM) to be highly compact, and much unlike the unpressed films (Figure S3). In addition, the images of the dye-coated electrodes before and after CIP shown in Fig. 2 reveal that the transparency of the TiO2 electrodes is enhanced by CIP, which is consistent with previously reported results4. This is also true in the case of the inter-particle connectivity between TiO2 nanoparticles, as evident in the electrodes prepared by codeposition (Figure S4). The PCE of the aforementioned DSC devices was found to increase from 2 to 3.4% when the TiO2 film thickness was increased from 3 to 10 μm, but decreased beyond this point, suggesting that the optimal film thickness lies somewhere within the range of 8–10 μm. Similar results are also observed with both conventional soaking and codeposition processes in Fig. 3. An optimized DSC device with pre-dye-coated TiO2 electrodes resulted in a PCE of 4.1% at an open-circuit voltage (Voc) of 620 mV, short-circuit current (Jsc) of 11.2 mA/cm2, and ff of 0.58. Figure 4 shows the corresponding I–V characteristics of this optimized device, with its incident photon-to-current conversion efficiency (IPCE) spectra shown in Fig. 4(a) inset. Note that its maximum IPCE reaches 48% at a wavelength of 525 nm.

Bottom Line: This study investigates novel deposition techniques for the preparation of TiO2 electrodes for use in flexible dye-sensitized solar cells.These proposed new methods, namely pre-dye-coating and codeposition ultrasonic spraying, eliminate the conventional need for time-consuming processes such as dye soaking and high-temperature sintering.Power conversion efficiencies of over 4.0% were achieved with electrodes prepared on flexible polymer substrates using this new deposition technology and N719 dye as a sensitizer.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, School of Natural Science, Ulsan National Institute of Science and Technology, Ulsan, 689-798, Republic of Korea.

ABSTRACT
This study investigates novel deposition techniques for the preparation of TiO2 electrodes for use in flexible dye-sensitized solar cells. These proposed new methods, namely pre-dye-coating and codeposition ultrasonic spraying, eliminate the conventional need for time-consuming processes such as dye soaking and high-temperature sintering. Power conversion efficiencies of over 4.0% were achieved with electrodes prepared on flexible polymer substrates using this new deposition technology and N719 dye as a sensitizer.

No MeSH data available.


Related in: MedlinePlus