The world highest efficiency organic thin film solar cell ever recorded
Toray industries a leading Japanese manufacturing company in the areas of fibers, textiles, plastics to name a few, made an announcement on the development of new polymer donor material for a thin film solar cells with conversion efficiency of 5.5% the highest efficiency that has been announced up to now. Toray is planning to increase the conversion efficiency of this new material by as much as 7% before its use in a commercialized organic thin film solar cell sometimes by 2015. The new material has an open voltage of around 1V due to incorporating a new structure within the polymer backbone resulting in greater energy difference between the donor and acceptor material. Further, the new material features a new substituent capable of forming an optimal structure for power generation layer resulting in both high short circuit current and voltage. As for the durability of new material, it features a stable molecular structure in preventing performance degradation even in the case that the material will be exposed to the air for an extended period of time.