Peccell Technologies Inc. has developed a technology to produce large-area high-voltage film-type dye-sensitized solar cell (DSC) modules with a high-speed, low-cost printing process. Peccell, based in Yokohama City, Japan, and led by Prof. Tsutomu Miyasaka, Toin University of Yokohama, has been developing next-generation thin flexible DSCs jointly with Fujimori Kogyo Co., Ltd. and Showa Denko K.K.
According to the company, the newly developed technology enables the formation of a 15-micron-thick titania semiconductor layer, which serves as a power-generation layer, on a plastic film at ordinary temperatures and by a rapid printing process.
A special paste, consisting of nano-scale fine particles of crystalline titania, is used in the process. Under the conventional process, titania-based semiconductor layers are formed in a vacuum and through baking at high temperatures, requiring the use of large-scale facilities.
A new transparent conductive film with a metal-micro-grid structure is then coated on the plastic substrate. Compared with the conventional indium-tin-oxide (ITO) film, the new transparent conductive film has only 1/20 surface resistance, Peccell notes. The new substrate will ensure high durability when used in DSCs.
Peccell is planning to build a trial production line for the newly developed solar cell and begin shipment of samples by the end of 2009.