On August 29, according to foreign media reports, Saudi Arabia, the researchers developed the organic is too thin, Yang to battery, the battery has some advantage in comparison to similar battery. It is understood that this new type of solar cells more efficient, its use more common components and can be ink jet printing on the surface, in turn, can achieve enough light and flexible, which used for wearable electronic devices.
This new type of solar cell is completely can print design, each layer with different professional ink to print it out. Electrode is called by a kind of PEDOT: PSS transparent conductive polymers, there is a layer of organic photovoltaic materials. Outside is a layer of polyethylene, this is a layer of waterproof coating, it can help seal electronics to resist the effects of the weather."We designed for each layer structure of solar cell functional ink," the study's authors, said Daniel Corzo "ink-jet printing itself is a science in that. Ink cartridges and need to overcome the intermolecular forces, from very small nozzle very fine droplets. Solvent after ink deposition also plays an important role, because the drying behavior affects the quality of the film."
Research team found that on the glass plate tests, the new type energy conversion efficiency of solar cells has reached the 4.73%, this in the field of solar cells is not high, but the team said that broke the record 4.1% before printing all the battery. In addition, its performance is better than other types of thin solar cell. When printing on flexible substrates, conversion efficiency is down to 3.6%.
But they make up for the deficiency of the overall efficiency in other ways. Ink-jet printing technology to make them more scalability than other thin solar cells, thin solar cells usually use spinning or thermal evaporation coating technology. In addition, they also do not contain steel - kind of toxic and more and more rare metal, used in solar cells.This new type of solar cells is very light, the team will be placed in a bubble surface proved itA little. The team says, this kind of light, flexible solar cells can be used for small sensors, wearable electronic devices and other low energy power supply."Robot sensors and electronic skin, flight equipment to detect disease huge development of biosensors are limited to energy sources," one of the authors of the study Eloise Bihar, points out that "instead of using heavy batteries or connected to the grid, we consider the use of lightweight, ultra-thin organic solar cells obtained from the indoor or outdoor light energy.
