Introduction of new nano-crystalline solar cells

Nanjing University has developed a new type of visible light response type oxide semiconductor optoelectronic very prepared to develop a new visible lightdell battery response type solar cells, without the use of organic dyes under the conditions of its sunlight conversion rate has reached 1.0%; from a fundamental solution of the dye-sensitized life expectancy of solar cells with low and unstable weaknesses. The research group the latest research results show that the visible light response by a variety of new-type composite oxide semiconductor optoelectronic prepared accompanied by a very small amount of dye-sensitized electrode available to higher current (Jsc) and voltage (Voc) without affecting the Novel visible light responsive solar life. This is the world's first visible light-responsive solar research.

Our research goal is to develop new, efficient, low-cost solar cells to respond to visible light. Optimization constitutes a new type of solar cell performance of the various elements, to find the best value. Finally a good use of lithium-ion battery charge and discharge   Dell Latitude D520 batterycharacteristics of the new visible light-responsive electrical energy generated by solar cells store. After three years of development goals for the conversion efficiency of 11%, ten years later conversion efficiency increased to 15%. And strive to achieve the overall production cost of the project 4-5 yuan / Wp goals. Ultimately cost 3 yuan / Wp the following targets. To further improve the new generation of solar energy technology and energy storage system for the theoretical and experimental systems, in order to provide our country with endless energy reserves for China's high-tech industry with independent intellectual property rights to provide high efficiency, low prices and a series of new optical switching devices products, and related new materials and new technologies.

Dye-sensitized solar cell by the dye sensitizer, wide bandgap semiconductor, redox electrolyte and the electrode 4 parts. Dye-sensitized solar cells is currently the highest energy conversion efficiency of 11%, from ruthenium bipyridine complexes, titanium dioxide, I-/I3- electricity and platinum on the electrode was right. The efficiency of dye-sensitized solar cells have reached the traditional level of silicon cells, with the latter than the former production process is simple, low cost applications in the Dell Latitude D510 batteryfuture brighter. In the silicon cell, silicon assume three important functions, namely, absorption of light, to bear the necessary separation of electron and hole electric field, the electronic transmission. Since the efficient implementation of these three tasks at the same time, the purity of semiconductor materials must be very high, this is the high cost of silicon-based solar cells can not be carried out with the traditional methods of electricity the main reason for business competition. In contrast, dye-sensitized solar cell of the four components of the implementation of different functions, respectively, for the various parts can be both efficient and cost-optimized, respectively, reduce costs and improve efficiency is very big.

Dye-Sensitized Solar Cells by the Swiss chemist Michael Gr? Tzel first proposed, and their research team can get more than 10% efficiency. We are apart from Gr?  Dell Latitude D500 batteryTzel Study Group other than the first one to obtain efficiency is greater than or equal to 10% of the research community, with rich production and efficiency of the battery optimization technology. In the dye-sensitized solar cells, due to the field of TiO2 itself can not absorb visible light energy (Eg <3.2eV), rely solely on organic dyes (light-sensitive dye) to improve the absorption of sunlight in the visible light. However, organic dye Yi poor heat aging, so bring the life of dye-sensitized solar cells with low and unstable weaknesses. In addition the use of dyes to the complexity of electronic transitions, coupled with semiconductor and broadband matching difficulties with energy levels, reducing the photoelectric conversion efficiency, but also because of the extensive use of dyes has increased the cost of batteries, a serious obstacle to their practical applications . In this situation, we have from the very start with visible light responsive photoelectric, using visible light responsive photoelectric poles direct photoelectric conversion. The first time in the world, a new type of visible light response type solar cell research, the first successful synthesis of the field of activity in the visible oxide semiconductor photocatalyst, a fundamental solution to the visible light responsive photoelectric pole material. This achievement was the end of 2001 in the scientific community's most influential journal Nature published in overseas media have been widely reported.

The research group has developed the use of these new visible light response type oxide semiconductor optoelectronic very prepared to develop new visible Dell Latitude D505 battery light response type solar cells, without the use of organic dyes under the conditions of its sunlight conversion rate has reached 1.0%; from a fundamental solution the dye-sensitized solar cells with low and unstable life of weakness. The research group the latest research results show that the visible light response by a variety of new-type composite oxide semiconductor optoelectronic prepared accompanied by a very small amount of dye-sensitized electrode available to higher current (Jsc) and voltage (Voc) without affecting the Novel visible light responsive solar life.