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

Yi-Bing Yi-Bing ^a, Hyun-Gyu Han^a, Jeong Soo Kim^a, David J Jones^a, Hasitha C Weerasinghe, Kwang Min Kim, Andrew B Holmes, Tae-Hyuk Kwon

^aUlsan National Institute of Science and Technology, NSB601-7, Unist-Gil 50, Ulju-Gun, Ulsan, 689, Korea, Republic of

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Hyun-Gyu Han, 279
Publication date: 5th February 2015

Flexible dye-sensitized solar cells (DSC) have received considerable attention for use in a wide range of potential commercial applications, such as wireless sensor or mobile devices, as well as for building integrated photovoltaic modules.This can be mainly attributed to the fact that the spectrum of the different dyes used in DSCs fits well with those of indoor lightning sources, as well as sunlight indirectly diffused through windows. The ability to fabricate multicolored DSCs by choosing appropriate dyes to absorb selected spectral regions of solar light presents another promising advantage in architectural applications.Moreover, the device performance of transparent DSCs can be greater than that of competing transparent amorphous silicon solar cells. Despite these advantages, current fabrication processes for DSCs have intrinsic barriers that hinder their use in the continuous mass production of DSC modules using speedy roll-to-roll methods. We have investigated novel, commercially viable deposition techniques for the preparation of TiO₂ electrodes for 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.

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