Graphene Solar Cells-- Technology Trends

PART 2-- Technology Trends

Application of graphene in the dye-sensitized semiconductor thin film batteries and battery technology (LiFePO4 battery pack)research and development is the world's hot spots, the other developed domestic hot - heterojunction photovoltaic cells can be regarded as Chinese characteristics, like portable solar power generator.

Global graphene solar cells patented technology focused on the dye-sensitized solar cell, a semiconductor thin film batteries, silicon-based battery technology, a total of 224 patent applications; followed by the generic class of solar cells, including many types of solar cells can be used in common parts, a total of 197 patent applications; the rest of the application as well as a greater amount of organic polymer-based solar cells, a total of 57.

Overall, the current graphene solar cells research focus is concentrated on the dye-sensitized solar cell, a semiconductor thin film batteries, silicon-based cells, and can be used for many types of solar cells in the common parts.

China graphene solar cells patented technology distribution and global distribution of the patented technology is substantially similar, but there is a significant difference in the country, hetero junction photovoltaic cells also have high applications, hetero junction photovoltaic cells a total of 20 items.

China graphene on technical efficiency of the solar cell in terms of the patent application, which patent application is possible to improve the photoelectric conversion efficiency up purposes, to improve conductivity and followed patent applications improved light absorption rate, and reduce the production cost of the patent application, used to improve the power density and minimum short-circuit current of the patent application.

Although there are more patent applications of graphene only as an optional carbon material, but because of graphene its many outstanding performance, especially having excellent electrical conductivity, more and more concern from R & D personnel in the field of solar cell for solar powered portable generator.

Graphene modified dye-sensitized solar cell patent application relates substrate light anode, the light anode conductive layer / conductive thin film on a substrate electrode, counter electrode catalyst layer, the electrolyte; patent applications from 2008 started after 2010 there has been explosive growth.

Technology patent applications related to the original country mainly from four countries, namely South Korea, China, the United States and Japan, and the target market's patent portfolio is mainly China, South Korea, the United States and Japan. Authorize a higher proportion, 78 per cent of patent applications have been closed, indicating that the patent application graphene modified dye-sensitized solar cells have a higher degree of innovation.

The main applicant is South Korea's UNIV SEOUL IND COOP GROUP and KOREA INST SCI & TECHNOLOGY, the Chinese Academy of Sciences, and the most influential of the applicant is the Samsung Group, which has a graphene modified dye-sensitized solar cell's basic patents US2009071533A1.