Methods of measurement of dye-sensitized solar cells

28 01 2013

The dye-sensitized solar cells progresses towards industrial realizations, it is recognized that some standards and agreements for the measurement of the solar cell performance and characterizations have to be made. This process must lead to internationally recognized standards adapted to this technology and other nano-enabled photovoltaics, such as the organic solar cells. The development of such methods may be slow but it somehow has to start. A meeting on this topic was held this week at Mt. Zao in Yanagata, Japan, organized by the KAST Academy of Science and Research Association RATO. The meeting was put together by researchers Hirosi Segawa sensei, Satosi Uchida sensei of Tokio Research Center RCAST and Katsuhiko Takagi sensei of KAST.

There is a broad basis of knowledge in the DSC area that some things have been done inadvertedly wrong in the past, such as the cell masking when measuring the power conversion efficiency under illumination, which led to erroneous determination of efficiencies. There is an understanding that crucial aspects of the solar cell characterization such as the measurement of current-voltage curve and the external quantum efficiency require special care because the DSC has a very slow dynamic response. It was recognized in the meeting that some broader understanding and sharing of information is needed about these very practical and important points. The meeting also showed the interest of several major industries in Japan for the DSC comercialization. In combination with some developments in Europe, these advances make it necessary to have some broad agreement of standards that will certify the quality of DSC products.

Up to Mt. Zao

Up to Mt. Zao

 

Famous “juhyo” iced forest in Mt. Zao

Famous “juhyo” iced forest in Mt. Zao

Iced forest in Mt. Zao

Iced forest in Mt. Zao

Table dinner with Michael Gratzel, Nam-Gyu Park, Sozo Yanagida, Anders Hagfeldt and the author.

Table dinner with Michael Gratzel, Nam-Gyu Park, Sozo Yanagida, Anders Hagfeldt and the author.

Organizer Hirosi Segawa and the author

Organizer Hirosi Segawa and the author

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Uchida sensei presents a dye-sensitized solar cell fabricated in RCAST by a drop casting method to Michael Gratzel

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Photovoltaics in Europe

17 01 2013

EPIA – the European Photovoltaic Industry Association

report

Already today in some countries the installed capacity of PV meets a significant share of the overall installed generation capacity. In Germany for instance, at the end of 2011 24.8 GW of PV capacity coexisted with 29.1 GW of wind capacity – representing together more than 35% of the total installed generation capacity.

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Swedish dye solar cells: Dyenamo

17 01 2013

After many years of work on the applied side of science and technology of dye sensitized solar cells, Anders Hagfeldt and his collegues have launched the company Dyenamo to contribute to the nascent industrial activities of this promising photovoltaic technology. They will cover a broad spectrum of R&D activities from fundamental research and material development to applied prototyping, up-scaling, and manufacturing process development, and provide DSC materials, mainly organic dyes and cobalt-based electrolytes. These materials have been largely devoted by the Uppsala groups and produced a major impact on the development of DSCs.

Here is a sample monolythic pannel 30×30 cm2 with 6% efficiency.

Good luck!

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