Studying the patent of technology development on Dye Sensitized Solar Cell

Greenhouse effects and Global warming problems have awoken human's attention to green energy. Recently, Dye-Sensitized Solar Cells (DSSCs), which are known as one of the key technologies of green energy, have been widely applied to many different industries and quickly grown with a number of scientific publications and patent applications. These applications have D upgraded SSCs to the third generation innovation and highlighted the importance of green energy. Therefore, this study aims at identifying the relationship between DSSCs patent and technological innovation. This study applied USPTO to figure out the research data, patent right, and other items. The use of Boolean logic combinations found out 141 documents related to DSSCs patent in the past years and 459 documents connected to solar energy 33 years ago. In addition, this research also focused on the patent number, International Patent Classification (IPC) and quote of patent in order to determine the independence of the patented technology and possibility of infringement. Then, the evolution of technological innovation was explored and demonstrated by the patent map through social network analysis. Finally, the study selected five countries, which were The United States, Japan, South Korea, Taiwan, and Australia, as typical representatives of the technology development to show the process of technological innovation via social network analysis diagram. The results show that the DSSCs patent in Australia is still in the first stage of enlightenment. The H01L021/00 is an important type of technology development in Taiwan. The social network analysis diagram of Japan and South Korea shows the different models of development, and the largest number of applications for DSSCs patents belong to The USA. This indicates that The USA has abundant human resources in R