A research team from the Norwegian University of Science and Technology (NTNU) has developed a method to create ultra-high efficiency solar cells using semiconductor nanowire materials. If used in conventional silicon-based solar cells, this approach could potentially double the efficiency of current low-cost silicon solar cells. The research paper was published in the American Chemical Society journal ACS Photonics.
Anjan Mukherjee, the lead developer of the new technology and a doctoral student at NTNU, said their new method uses gallium arsenide materials and nanostructures very efficiently . It is therefore possible to increase the efficiency of solar cells using only a small fraction of commonly used materials.
Due to its extraordinary absorption of light and its prelectrical properties, gallium arsenide is the best material for making high-efficiency solar cells and is often used to make space solar panels. However, the manufacturing cost of high-quality gallium arsenide solar modules is quite high. In recent years, it has been realized that nanowire structures can potentially increase the efficiency of solar cells and use fewer materials than standard planar solar cells.
NTNU researcher Haig Wieman says the team has found a new way to create solar cells that are more efficient than any others using gallium arsenide in a very high power nanowire structure. solar cells 10 times more powerful than batteries.
GaAs solar cells are typically grown on thick and expensive gallium arsenide substrates, leavinglittle room for cost reduction. The new method uses vertical semiconductor nanowire array structures to grow nanowires on an inexpensive silicon platform. Professor Weiman explained that the most cost-effective and efficient solution is to grow dual cells in tandem, with a gallium arsenide nanowire top cell grown on a silicon bottom cell, thus avoiding the use of substrates. expensive in gallium arsenide.
Researchers are using molecular beam epitaxy to develop nanowires, and with appropriate investments and industrial-scale R&D projects, the development of this technology can be directly profitable. The researchers said integrating the product onto a silicon cell could increase the efficiency of solar cells by up to 40%, meaning double the efficiency compared to conventionalCurrent commercial silicon solar cells. Adapting the new method to grow nanowires on different substrates could also open the door to many other applications.
The researchers say they are exploring the growth of this type of lightweight nanowire structure on atomically thin, two-dimensional substrates such as graphene. Its potential is enormous in the field of self-propelled drones, microsatellites and a wide range of other space applications.
Editor/Fan Hui
Will Tianneng Black Gold Graphene Spontaneously Ignite?
Sheet Resistor Graphene films have been widely used in many fields, there are applications.
First of all, the sheet resistance of graphene can be used to measure the resistivity of graphene materials. By measuring the square resistance of graphene films, we can understandSes electrical and physical properties are of great importance for studying the properties and applications of graphene materials.
Second, the sheet resistance of graphene can be used to fabricate graphene devices. Graphene has excellent electrical conductivity and mechanical properties, so it can be used to manufacture various graphene-based devices, such as graphene field effect transistors, graphene solar cells, etc. In these devices, the graphene sheet resistor has a significant impact on the performance and stability of the device.
In addition, the sheet resistance of graphene can also be used to make flexible electronic devices. Since graphene has excellent flexibility and conductive properties, it can be used to make flexible electronic devices, such as flexible displays, flex solar cells.ibles, etc. In these devices, the sheet resistance of graphene has a significant impact on the stability and reliability of the device.
Does not ignite spontaneously. Graphene batteries themselves are the evolutionary product of lithium batteries, so they should be called lithium-graphene batteries. It's just that the lithium battery is solidified by adding graphene sheets to reduce the release of oxygen and avoid the risk of combustion and explosion releasing toxic gases and white smoke. The safety of graphene batteries is greatly improved. Not only do they dissipate heat better, graphene batteries will not cause problems such as heating, burning, fire or explosion due to rising temperatures. Tianneng Co., Ltd. is a leading enterprise in China's new power battery industry. It mainly manufactures environmentally friendly power batteries.environment for electric vehicles and integrates the research and development of lithium batteries for new energy vehicles, start-stop batteries for vehicles and wind power. and solar energy storage batteries.