THIS ARTICLE IS HERE republished from Conversation under a Creative Commons License.
The sight of solar panels installed on roofs and immense energy farms has become an everyday occurrence in many regions of the world. Even in gray and rainy Britain, solar energy is becoming a major factor in electricity generation.
This augment in solar energy apply is being driven by two key developments. First, scientists, engineers and industry workers are learning by the billions how to produce solar panels. Each stage of production is carefully optimized to produce them very cheaply. Second, and most significant, is the continuing augment in panel energy conversion efficiency – a measure of how much sunlight can be converted into electricity.
The taller efficiency of solar panelsthe cheaper the electricity. This might make you wonder: How proficient can solar energy be? Will this affect our energy bills?
Solar panels currently available on the market convert approximately 20 to 22 percent of sunlight into electricity. However, new research published in Nature showed that future solar panels could achieve efficiency of up to 34 percent using a up-to-date technology called tandem solar cells. Research has shown record power conversion efficiency in tandem solar cells.
What are tandem solar cells?
Established solar cells are made of a single material that absorbs sunlight. Today, almost all solar panels are made of silicon, the same material that makes up the core of microchips. Although silicon is a mature and reliable material, its efficiency is restricted to about 29 percent.
To overcome this limit, scientists turned to tandem solar cells, which consist of two solar materials stacked on top of each other to capture more solar energy.
In a up-to-date Nature paper, a team of scientists from energy giant LONGi report on a up-to-date tandem solar cell that combines silicon and perovskite materials. Thanks to improved sunlight harvesting, the up-to-date perovskite-silicon tandem achieved a world-record efficiency of 33.89%.
Perovskite solar materials that were discovered less than two decades agohave proven to be the perfect complement to established silicon technology. The secret is in them light absorption adjustable. Perovskite materials can capture high-energy blue lightweight more effectively than silicon.
In this way, energy losses are avoided and the overall efficiency of the tandem is increased. Other materials called III-V semiconductors, were also used in tandem cells and achieved higher efficiency. The problem is that they are challenging to produce and costly, so only compact solar cells combined with focused lightweight can be made.
The scientific community is putting enormous effort into perovskite solar cells. They maintained a phenomenal pace of development, with efficiency (for a single cell in the lab) increasing from 14 percent to 26 percent in just 10 years. Such advances have enabled their integration into ultra-high-efficiency tandem solar cells, demonstrating a path to scaling photovoltaic technology to the trillions of watts the world needs to decarbonize our energy production.
Cost of solar energy
Fresh record-breaking tandem cells can capture an additional 60 percent of solar energy. This means that fewer panels are needed to produce the same energy, reducing installation costs and ground (or roof) space required for photovoltaic farms.
This also means that plant operators will produce solar energy at a higher profit. However, because of the way Electricity prices are set in the UKconsumers may never notice the difference in their electricity bills. The real difference comes when you consider rooftop photovoltaic installations, where space is restricted and space must be used efficiently.