Tongji Sunshine Solar: offering you efficient and environmentally friendly energy solutions
What is solar energy?
Solar energy refers to the technology that uses energy from solar radiation for energy conversion. It is a clean and non-polluting source of energy. There are two main ways to use solar energy: the use of solar thermal and the use of solar photovoltaic.
Advantages of Tongji Sunshine Solar
Tongji Sunshine Solar is an enterprise specializing in the research, development, production and sales of solar photovoltaic technology. We have a professional technical team and use internationally advanced production processes and equipment to produce high-quality and high-efficiency photovoltaic solar panels.
Tongji Sunshine Solar products have the advantagesfollowing steps:
1. High efficiency: The conversion efficiency of the solar panels we use reaches 22% or more, which is more efficient than ordinary solar panels on the market. At least 10% higher.
2. Long service life: Our solar panels use high-quality materials and advanced production processes, with a service life of more than 25 years.
3. Environmental protection: Solar energy is a clean and pollution-free energy source. Using solar panels can reduce emissions of harmful gases such as carbon dioxide and is environmentally friendly.
How to install Tongji Sunshine solar panels?
Installing Tongji Sunshine solar panels requires the following steps:
1. Select an installation location: Solar panels must be fully exposed to sunlight, so they should choose a location without obstructions.
2. Install the bracket: Fix the bracket in the installation position to ensure it is firm and stable.
3. Install the Battery Panel: Install the battery panel onto the bracket, making sure the front of the battery panel faces the sun.
4. Connect the cables: Connect the positive and negative poles of the battery panel to the inverter, then connect the inverter to the power grid.
How to use Tongji Sunshine solar panels?
The following steps are necessary to use Tongji Sunshine solar panels:
1. Connect the power supply: Connect the inverter to the power supply and turn on the solar power supply function. sign.
2. Monitor power: With the inverter monitoring system, you can check the energy production and power of the solar panels.
3. Electricity consumption: the use of electricityElectricity generated by solar panels to power household appliances can reduce household electricity costs.
Highest efficiency in photovoltaic solar energy production
A research team from the Norwegian University of Science and Technology (NTNU) has developed a method to create ultra-high yield. 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 theyThe new method uses gallium arsenide-based materials and nanostructures from very effective way, increasethus increasing the efficiency of solar cells using only a fraction of commonly used materials.
Due to its extraordinary light absorption and electrical properties, gallium arsenide is the best material for making high-efficiency solar cells and is often used to manufacture 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. cSolar cells 10 times more powerful than batteries.
GaAs solar cells are typically grown on thick, expensive gallium arsenide substrates, leaving little 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 CResearchers 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 current 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
Which types of solar panels have the highest power generation efficiency?
24%. The efficiency of solar photovoltaic energy production is linked to many factors, notemment the solar cell materials used, the module design and manufacturing processes, as well as the environmental conditions. Currently, monocrystalline silicon solar cells are the most efficient type in commercial applications, and their conversion efficiency can reach about 24%.
The ideal high-efficiency solar cell tandem: graphene-perovskite-silicon
The highest photoelectric conversion efficiency of solar energy into monocrystalline silicon reaches 24%, which which is currently the highest of all. Kinds. The highest photoelectric conversion efficiency among solar cells. However, the production cost of monocrystalline silicon solar cells is so high that they cannot be widely and commonly used in large quantities. Polycrystalline silicon solar cellsIn terms of production cost, it is cheaper than solar cellsires in monocrystalline silicon, but the photoelectric conversion efficiency of polycrystalline silicon solar cells is much lower. In addition, the lifespan of polycrystalline silicon solar cells is shorter than that of monocrystalline silicon solar cells. Therefore, in terms of performance-price ratio, monocrystalline silicon solar cells are slightly better.
Over the past decade, researchers have discovered that some compound semiconductor materials are suitable for solar photoelectric conversion films. For example, compound semiconductors CdS, CdTe; III-V: GaAs, AIPInP, etc., thin-film solar cells made with these semiconductors have very good photoelectric conversion efficiency. Semiconductor materials with multiple gradient energy band gaps (the difference in energy level between the conduction band andthe valence band) can expand the range of the solar absorption spectrum, thereby improving the efficiency of photoelectric conversion. Thin-film solar cells offer broad prospects for a large number of practical applications. Among these various semiconductor materials, Cu(In,Ga)Se2 is a solar light absorbing material with excellent performance. On this basis, thin-film solar cells with significantly higher photoelectric conversion efficiency than silicon thin-film solar cells can be designed, with an achievable photoelectric conversion rate of 18%.
The laws of physics limit the maximum. silicon solar cell efficiency At 32%, faced with the dilemma of solar energy conversion efficiency, scientists have spent decades trying to find other alternatives, such as perovskites. However, the manufacture of the latter presents plThere are several challenges, among which increasing the production of solar panels is a key step towards success.
At the same time, scientists are trying to combine two or more solar photovoltaic technologies to create different materials that are complementary in terms of performance and light absorption range to improve the efficiency of photovoltaic conversion. For example, perovskite-silicon tandem solar cells combine the advantages of silicon and perovskite, but stability, efficiency and mass production still seem to be a distant dream. The further emergence of graphene is considered to be of great help in improving the performance of solar cells and could even lead to revolutionary advances.
Recently, researchers from the University of Rome Torvergata, the Italian Institute of Technology and its affiliated institution Graphene Flagship BeDimensional collaborated with Spanish clean technology company ENEA to successfully combine the combination of graphene with perovskite-silicon tandem solar cells, the conversion efficiency reached 26.3%. The results of the relevant research were published in the magazine “Joule”.
Based on the multifunctional properties of graphene, the efficiency of graphene tandem solar cells is almost 2 times that of pure silicon. The research team envisioned a new manufacturing method for producing large-area solar panels. and reduce production costs. The results suggest that graphene and related layered materials will enable the commercialization of more efficient and cost-effective large-area solar panels. The new technology can be applied to existing perovskite solar cells using manufacturing methods based on standard solutions.
The research team said the new method of making graphene solar cells has a dual potential. Firstly, it could be used to improve all different types of existing perovskite solar cells, including those processed at high temperatures, but more importantly, graphene could be integrated using widely used "solution manufacturing methods". used, which are the key to further industrialization of technology; and produce graphene solar panels.
In fact, they are already working on two “pioneering projects” for the industry to exploit the application potential of graphene solar cells. The researchers note that this innovative approach is a first step toward developing tandem solar cells offering efficiencies beyond the limits of single-section silicon devices. Materials in couches will be essential to achieve this goal.
This new type of solar cell will form the basis of the flagship graphene project GRAPES, which will carry out production trials of graphene-based perovskite-silicon tandem solar cells, aiming for an energy conversion index solar power greater than 30%. , while reducing production costs. Another key objective is to maintain high solar conversion efficiency while increasing the size of solar modules.
It is understood that as a project funded by the European Commission, the mission of the GRAPES project is to improve the stability and efficiency of this technology and to increase acceptance of solar energy. projects in Europe. Since the launch of the GRAPES graphene flagship project, the application of graphene and related materials to solar power generation has been considered a strategic priority.