Breakthrough in photovoltaic technology and improved conversion efficiency Bosch Solar Energy AG announced that its conversion efficiency for large-area PERC solar photovoltaic cells has set a new world record with a conversion efficiency of 19.6%. In general, silicon-based solar cells using screen printing technology have conversion efficiencies ranging from 17% to 18.5%. PERC is the “emitter and back passivated batteryâ€. This monocrystalline silicon solar cell uses metal screen printing technology. The back is covered with a layer of dielectric and metal layer with local contact points. This new structure optimizes the optical and electrical properties of solar cells. The projected light is reflected on the back of the cell, allowing the emitter to convert more light into electrical energy. The front of this high-performance battery is also optimized. The solar modules using these cells have a corresponding increase in output power even under weak light, and can increase the ambient temperature of the surroundings while increasing the power production. Solar Junction announced that the company's commercial solar photovoltaic cell conversion efficiency has reached a world record of 43.5% and has been certified by the US Department of Energy (DOE) and the National Renewable Energy Laboratory (NREL). This 5.5mm x 5.5mm cell has the highest peak conversion efficiency at 400% sunlight intensity, and the conversion efficiency is maintained at 43% when the sun intensity reaches 1000. The company plans to increase its internal capacity to 250 MW per year and begin commercial operations by the end of 2011. Multi-country active PV projects On April 19, 2011, Avidan Management of Edison, NJ, announced that the largest 4.26MW rooftop PV system in the United States has been completed. The photovoltaic power plant is located on the roof of a distribution plant in Edison, New Jersey, USA. =, consisting of 17,745 Solar World components with a total roof area of ​​69,000 square meters. The power station will provide electricity to the owners, who use the building as a warehouse for storing and storing dry and chilled frozen food. South Korea's Hyundai-Avancis has recently started construction of Korea's largest CIGS thin-film solar module factory. The project has invested more than $200 million and is scheduled to be completed in 2012. The first phase of the plant's construction includes 100MW of CIGS capacity and increased to 400MW in 2015. The company hopes that the plant will be among the top five global CIGS solar module manufacturers in 2015 with the capacity of polysilicon, silicon ingots/silicon wafers, batteries, components and photovoltaic systems. Saudi Arabia announced plans to build the country's largest solar photovoltaic power station, building a 10 megawatt solar photovoltaic power station in Dara, a city in northeastern Saudi Arabia. In addition, the head of the Saudi Desalination Agency announced that it will open a solar desalination project in the last few months. Domestically, the photovoltaic industry is still in its infancy, and all provinces and cities in China are actively deploying and building photovoltaic industrial parks. At the same time, the state actively adjusts policies to ensure the healthy and stable development of the photovoltaic industry.
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