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At the mention of green energy or renewable energy, people almost immediately think of solar cells. The first solar cell is the silicon solar cell, was born in 1954, a lapse of 50 years old. However, silicon solar cell manufacturing process complexity, energy consumption, high cost, its widespread application has been limited. Since 1991, after the dye-sensitized solar cells (Dye-Sensitized Solar Cell) for cheaper raw materials, production process is relatively simple, more stable performance, failure to reduce such advantages into sight, and gradually by the industry’s attention.

So, what is the dye-sensitized solar cells do? Dye-sensitized solar cells by nano-porous semiconductor films, dye (photosensitizer), redox electrolyte, the electrode and the conductive substrate such as a few parts, Toshiba battery is a kind of dye-sensitized wide bandgap semiconductor thin film anode for the light of new light volt battery.

In this paper, China’s patent search database (CPRS) in the patent literature for the public entry point, the main applicant and analysis technology to domestic enterprises or research institutions to better respond to take measures to protect the core technology and innovation, and necessary to conduct new research and development, comprehensively enhance independent innovation capability and level. All statistics as of this March 22, 2010 only.

Main research directions

In recent years, photovoltaic cells or photovoltaic technology and its application in China has attracted increasing attention, the National Development and Reform Commission on August 31, 2007 issued a “long-term renewable energy development plan,” and issued a series of preferential policies to support the development of photovoltaic industry; March 3, 2008 issued the “renewable energy development” Eleventh Five “plan”, further defined the development of China’s renewable energy targets. Currently, China has become an international production base of photovoltaic products Acer ac adapter , Apple ac adapter .

However, our in dye-sensitized solar cell technology development and application are still faced with many problems, mainly concentrated in the photoelectric conversion efficiency, large area, the liquid electrolyte packages and long term stability and so on. For example, in photoelectric conversion efficiency, the current dye-sensitized solar cell laboratory small area (0.2cm2) maximum efficiency up to 11%, but 100cm2 battery efficiency only 5% to 9%, far less than silicon and gallium arsenide series battery All batteries, commercial solar cells.

For another example, in the long-term stability, the dye-sensitized solar cell using organic solvents and contain I-/I-3 by the redox form of liquid electrolyte, which is damaging the stability of “culprit.” Because the high temperature electrolyte leakage and evaporation of the solvent and the solution of thermal expansion, contraction caused by packaging materials, nano-porous film strip and Dye and fall off, you will have a devastating effect on the cell stability. In addition, the use of liquid electrolyte of the electrolyte may cause chemical reactions and heat insulation damage caused by the short circuit and optical non-reversible chemical reactions, they may undermine its stability. Thus, exploring the appropriate electrolyte gel and solid hole transport materials to replace the liquid electrolyte, preparation of high conversion efficiency of quasi-solid and solid-state dye-sensitized solar cells, the technology is an important research direction.

Surge in patent applications in recent years

Dye-sensitized solar cell in the field of related patent applications as of March 22, 2010 the public data, the area of patent applications for the 447, as shown in Figure 1, the dye-sensitized solar cell applications in the patent application volume change can see Asus ac adapter , Compaq ac adapter , before 2000, the development of the technology still in its infancy, only in 1996 and 1999, respectively, a patent application; from 2000 to 2006, the field is in the early stages of development, the slow increase in applications ; since 2006, into the rapid development stage, the rapid growth of its applications and maintain a rapid development momentum, which in 2008 had more than 100 applications (2008 and 2009 are still under patent applications public 18 months Therefore, in 2008 and 2009 applications are not fully reflected in the data).

Patent applicants mainly from Japan and South Korea

Figure 2 shows the dye-sensitized solar cell patent applications related to the distribution of the country know that the Chinese applicant related applications in China ranked first, accounting applications (447) to 74.7%, Japan and South Korea the applicant’s patent applications in China came in second and third, respectively, for the total amount of 13.2% and 4.0%. Therefore, the domestic technology development in the field more quickly, in the patent application has the absolute advantage.

Japan and South Korea compared to other countries, in comparison to the field strong technical strength, higher R & D investment, a strong sense of patent protection, and more emphasis on the Chinese market, has begun in China-related patent portfolio.

On Figure 3 lists the area of dye-sensitized solar cell patent application that the principal applicants, we can see applications in the top 10 applicants, in addition to South Korea’s Samsung ranked tenth place (with the Southeast University, Nanjing University , Tsinghua University, Wuhan University, tied), Dell ac adapter , Fujitsu ac adapter  the other applications from Chinese companies or research institutions, Japan-based medicine ranked twelfth.

In addition, it is noteworthy that the area in addition to major domestic applicants Rainbow Group, a business, the rest are Chinese Academy of Sciences research institutes or universities. This indicates that domestic universities and Chinese Academy of Sciences of the technology, great attention has been put into a certain R & D, and has strong patent protection awareness to the international competition in this area gain an advantage.

Chinese companies to gain the upper hand in the global patent strategy

Through the above analysis is not difficult to find, dye-sensitized solar cell is the area of solar photovoltaic technology to study the relatively new branch, is still in the labs, mostly in their patent applications after 2000; domestic development in the area more quickly, universities and research institutes in this highly technical field concerned,  HP ac adapter  have invested some R & D and have a strong sense of patent protection; Japan and South Korea in the field more abundant technical strength, higher R & D investment, and has begun in China-related patent portfolio. Relevant domestic enterprises or research institutions can focus on the development of new technologies in the field, the use of new materials, new processes with higher levels of output of some of the core technology patent, in pursuit of the world’s dominant position in the patent strategy.

This entry was posted on Monday, July 26th, 2010 at 5:47 am and is filed under batteries, battery news. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.