Korea Electric Power Corp. (KEPCO) has developed a flat panel solar cell with the highest efficiency in the world.
KEPCO announced on Oct. 21 that it has succeeded in producing a perovskite solar cell with photoelectric conversion efficiency of 20.4 percent, which eclipses the previous world record of 20.1 percent.
Photoelectric conversion efficiency is the ratio of converting sunlight to electric power. Perovskite is a mineral found in the Ural Mountains of Russia in 1839.
Perovskite solar cells can be produced in a process below 400 degrees Celsius, unlike silicon solar cells that require a process above 1,000 degrees Celsius. Accordingly, their production cost is low while their photoelectric conversion efficiency is similar to that of silicon solar cells. This makes perovskite solar cells next-generation solar cells.
In addition, perovskite solar cells are translucent and light. This fact makes it easy to put them on the exterior of buildings such as building walls and balconies. They are also suitable for environments in Korea which does not have enough land for solar light panels but has many high-rise buildings.