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Controlled wetting/dewetting through substrate vibration-assisted spray coating (SVASC)

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Abstract

We have recently developed a novel spray-coating method, called the “substrate vibration-assisted spray coating” (SVASC) (Zabihi and Eslamian in J Coat Technol Res 12:711–719, 2015), in which ultrasonic vibration is imposed on the substrate to improve the spray-on film and coating characteristics. In that work, the SVASC method was introduced, and its effectiveness on the uniformity and electrical conductivity of PEDOT:PSS films, used in emerging solar cells, was demonstrated. The present work reports unprecedented results on the effect of the ultrasonic vibration power on wetting/dewetting of PEDOT:PSS films. It is observed that, while the application of a low-power ultrasonic vibration (LPUV) improves the surface wetting and film coverage through improving droplet spreading and coalescence and repairing of the dewetted areas, a high-power ultrasonic vibration (HPUV) promotes dewetting, resulting in less coverage and the formation of a nonuniform film. The improved wetting due to the application of the LPUV has opened a window of opportunity for the fabrication of intact thin films and related thin film devices. On the other hand, the controlled dewetting process due to the application of the HPUV may have novel applications in template fabrication and self-assembly in nanotechnology. Here, we also study the effects of the application of multipass spraying compared with single-pass spraying strategy, and the application of using two co-solvents on PEDOT:PSS film characteristics. The results confirm that the utilization of isopropyl alcohol (IPA) as a co-solvent added to the PEDOT:PSS precursor solution improves the surface wettability and film coverage, compared to the films made using demethylformamide (DMF), as the co-solvent.

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References

  1. Eslamian, M, “Spray-on Thin Film PV Solar Cells: Advances, Potentials and Challenges.” Coatings, 4 60–84 (2014)

    Article  Google Scholar 

  2. Andrade, R, Skurtys, O, Osorio, F, “Drop Impact Behavior on Food Using Spray Coating: Fundamentals and Applications.” Food Res. Int., 54 397–405 (2013)

    Article  Google Scholar 

  3. Dressler, DM, Li, LKB, Green, SI, Davy, MH, Eadie, DT, “Newtonian and Non-Newtonian Spray Interaction with a High-Speed Moving Surface.” At. Sprays, 19 19–39 (2012)

    Article  Google Scholar 

  4. Xie, Y, Gao, S, Eslamian, M, “Fundamental Study on the Effect of Spray Parameters on Characteristics of P3HT:PCBM Active Layers Made by Spray Coating.” Coatings, 5 488–510 (2015)

    Article  Google Scholar 

  5. Eslamian, M, “A Mathematical Model for the Design and Fabrication of Polymer Solar Cells by Spray Coating.” Dry. Technol., 31 405–413 (2013)

    Article  Google Scholar 

  6. Lee, J-H, Yoshikawa, S, Sagawa, T, “Fabrication of Efficient Organic and Hybrid Solar Cells by Fine Channel Mist Spray Coating.” Sol. Energy Mater. Sol. Cells, 127 111–121 (2014)

    Article  Google Scholar 

  7. Tait, JG, Worfolk, BJ, Maloney, SA, Hauger, TC, Elias, AL, Buriak, JM, Harris, KD, “Spray Coated High-Conductivity PEDOT:PSS Transparent Electrodes for Stretchable and Mechanically-Robust Organic Solar Cells.” Sol. Energy Mater. Sol. Cells, 110 98–106 (2013)

    Article  Google Scholar 

  8. Barrows, AT, Pearson, AJ, Kwak, CK, Dunbar, ADF, Buckley, AR, Lidzey, DG, “Efficient Planar Heterojunction Mixed-Halide Perovskite Solar Cells Deposited via Spray-Deposition.” Energy Environ. Sci., 7 2944 (2014)

    Article  Google Scholar 

  9. Xue, L, Han, Y, “Inhibition of Dewetting of Thin Polymer Films.” Prog. Mater Sci., 57 947–979 (2012)

    Article  Google Scholar 

  10. Craster, RV, Matar, OK, “Dynamics and Stability of Thin Liquid Films.” Rev. Mod. Phys., 81 1131–1198 (2009)

    Article  Google Scholar 

  11. Jacobs, K, Seemann, R, Herminghaus, S, “Stability and Dewetting of Thin Liquid Film.” arXiv:0805.4336 [cond-mat.soft]

  12. Saramago, B, “Thin Liquid Wetting Films.” Curr. Opin. Colloid Interface Sci., 15 330–340 (2010)

    Article  Google Scholar 

  13. Ma, M, He, Z, Yang, J, Chen, F, Wang, K, Zhang, Q, Deng, H, Fu, Q, “Effect of Film Thickness on Morphological Evolution in Dewetting and Crystallization of Polystyrene/Poly(caprolactone) Blend Films.” Langmuir, 27 13072–13081 (2011)

    Article  Google Scholar 

  14. Srivastava, AK, Sachan, P, Samanta, C, Mukhopadhyay, K, Sharma, A, “Domain Growth of Carbon Nanotubes Assisted by Dewetting of Thin Catalyst Precursor Films.” Appl. Surf. Sci., 288 215–221 (2014)

    Article  Google Scholar 

  15. Whitehill, J, Neild, A, Ng, TW, Martyn, S, Chong, J, “Droplet Spreading Using Low Frequency Vibration.” Appl. Phys. Lett., 98 133503 (2011)

    Article  Google Scholar 

  16. Brunet, P, Eggers, J, Deegan, RD, “Motion of a Drop Driven by Substrate Vibrations.” Eur. Phys. J. Spec. Top., 166 11–14 (2009)

    Article  Google Scholar 

  17. Whitehill, JD, Neild, A, Stokes, MH, “Forced Spreading Behavior of Droplets Undergoing Low Frequency Vibration.” Colloids Surf. A, 393 144–152 (2012)

    Article  Google Scholar 

  18. Keshavarz, B, Green, SI, Davy, MH, Eadie, DT, “Newtonian Liquid Jet Impaction on A High-Speed Moving Surface.” Int. J. Heat Fluid Flow, 32 1216–1225 (2011)

    Article  Google Scholar 

  19. Fathi, S, Dickens, PM, Fouchal, F, “Regimes of Droplet Train Impact on a Moving Surface in an Additive Manufacturing Process.” J. Mater. Process. Technol., 210 (3) 550–559 (2010)

    Article  Google Scholar 

  20. Zabihi, F, Eslamian, M, “Substrate Vibration-Assisted Spray Coating (SVASC): Significant Improvement in Nano-structure, Uniformity, and Conductivity of PEDOT:PSS Thin Films for Organic Solar Cells.” J. Coat. Technol. Res., 12 711–719 (2015)

    Article  Google Scholar 

  21. Zabihi, F, Eslamian, M, “Characteristics of Thin Films Fabricated by Spray Coating on Rough and Permeable Paper Substrates.” J. Coat. Technol. Res., 12 489–503 (2015)

    Article  Google Scholar 

  22. Kim, YH, Sachse, C, Machala, ML, May, C, Müller-Meskamp, L, Leo, K, “Highly Conductive PEDOT:PSS Electrode with Optimized Solvent and Thermal Post-Treatment for ITO-Free Organic Solar Cells.” Adv. Funct. Mater., 21 1076–1081 (2011)

    Article  Google Scholar 

  23. Kim, N, Kee, S, Lee, SH, Lee, BH, Kahng, YH, Jo, YR, Kim, BJ, Lee, K, “Highly Conductive PEDOT:PSS Nanofibrils Induced by Solution-Processed Crystallization, Adv. Mater., 26 2268–72, 2109 (2014)

  24. Kim, K-J, Kim, Y-S, Kang, W-S, Kang, B-H, Yeom, S-H, Kim, D-E, Kim, J-H, Kang, S-W, “Inspection of Substrate-Heated Modified PEDOT:PSS Morphology for All Spray Deposited Organic Photovoltaics.” Solar Energy Mater. Solar Cells, 94 1303–1306 (2010)

    Article  Google Scholar 

  25. Chilvery, AK, Batra, AK, Guggilla, P, “A Versatile Technique for the Fabrication of PEDOT:PSS Films for Organic Solar Cells.” Energy Sci. Technol., 4 (2) 6–11 (2012)

    Google Scholar 

  26. Eslamian, M, Newton, J, “Spray-on PEDOT:PSS and P3HT:PCBM Thin Films for Polymer Solar Cells.” Coatings, 4 85–97 (2014)

    Article  Google Scholar 

  27. Zabihi, F, Xie, Y, Gao, S, Eslamian, M, “Morphology, Conductivity, and Wetting Characteristics of PEDOT:PSS Thin Films Deposited by Spin and Spray Coating.” Appl. Surf. Sci., 338 163–177 (2015)

    Article  Google Scholar 

  28. Girotto, C, Moia, D, Rand, BP, Aernouts, T, Heremans, P, “Efficient Polymer Solar Cells Via an All-Spray-Coated Deposition”. Photovoltaic Specialists Conference (PVSC). IEEE, Honolulu, HI, 2010

  29. Peh, RJ, Lu, Y, Zhao, F, Lee, C-LK, Kwan, WL, “Vacuum-Free Processed Transparent Inverted Organic Solar Cells with Spray-Coated PEDOT:PSS Anode.” Sol. Energy Mater. Sol. Cells, 95 3579–3584 (2011)

    Article  Google Scholar 

  30. Ristenpart, WD, McCalla, PM, Roy, RV, Stone, HA, “Coalescence of Spreading Droplets on a Wettable Substrate.” Phys. Rev. Lett., 97 064501 (2006)

    Article  Google Scholar 

  31. Tait, JG, Rand, BP, Heremans, P, “Concurrently Pumped Ultrasonic Spray Coating for Donor: Acceptor and Thickness Optimization of Organic Solar Cells.” Org. Electron., 14 1002–1008 (2013)

    Article  Google Scholar 

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Acknowledgments

Financial support from Shanghai Municipal Educational Commission, Oriental Scholar 2014 Program, granted to M.E. is appreciated. Authors wish to thank Amin Rahimzadeh for measuring the vibration amplitudes of the ultrasonic transducer.

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Authors and Affiliations

  1. University of Michigan - Shanghai Jiao Tong University Joint Institute, Shanghai, 200240, China

    M. Habibi, M. Eslamian, F. Soltani-Kordshuli & F. Zabihi

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  1. M. Habibi
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  2. M. Eslamian
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  3. F. Soltani-Kordshuli
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  4. F. Zabihi
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Correspondence to M. Eslamian.

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Habibi, M., Eslamian, M., Soltani-Kordshuli, F. et al. Controlled wetting/dewetting through substrate vibration-assisted spray coating (SVASC). J Coat Technol Res 13, 211–225 (2016). https://doi.org/10.1007/s11998-015-9748-2

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