UV treatment of TiO2 thin film layered by screen printing for fabrication of flexible dye sensitized solar cells

Kwang-Soon Ahn^a, Noh Eul Jung^a, BoYoun Jang^a, Jae Hong Kim^a, Se Hyun Kim^b

^aYeungnam University, Department of Chemical Engineering, Yeungnam University, Dae-dong, Gyeongsan, Gyeongbuk, Gyeongsan, 712, Korea, Republic of

^bYeungnam University, Department of Chemical Engineering, Yeungnam University, Dae-dong, Gyeongsan, Gyeongbuk, Gyeongsan, 712, 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, BoYoun Jang, 369
Publication date: 5th February 2015

The development of high performance flexible photovoltaic devices is essentially required for achieving successful commercialization. In addition, dye sensitized solar cells (DSSCs) system have been extensively studied due to their economic and environmental advantages. In this research, we introduce the low temperature treatment of TiO₂ layer by using UV irradiation, which is proper to fabricating flexible devices. Here, indium-doped tin oxide (ITO) electrode is used for transparent conductive electrode because various kinds of flexible substrates consist of polymer and ITO. TiO₂ paste is layered on ITO electrode and post-treated under the irradiation of UV light for removing organic binder. For comparison, TiO₂/ITO electrode is prepared by thermal treatment at high temperature. The duration of UV irradiation is varied for optimizing the process. It is observed that the post treatment by using UV irradiation does not affect to the resistivity of ITO electrode, while thermal treatment seriously increase the resistivity of ITO due to the formation of indium oxide. Moreover, UV irradiation helps the TiO₂ nanoparticles to form mesoporous structured TiO₂ electrode well, which is verified by SEM analyses. The duration is optimized at 3 hours irradiation of UV light on TiO₂/ITO, which shows better photovoltaic performance of DSSCs than thermally treated one.
Stepped Light-Induced Transient Measurements of Photocurrent Photocurrent and Voltage(SLIMPCV)
S. Nakade, T. Kanzaki, Y. Wada and S. Yanagida, Stepped Light-Induced Transient Measurements of Photocurrent and Voltage in Dye-Sensitized Solar Cells: Application for Highly Viscous Electrolyte Systems, langmuir 2005, 21, 10803-10807

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