Efficiency of crystalline silicon-based solar PV touch 25.6%

Panasonic has achieved a conversion efficiency of 25.6% is in its crystalline silicon-based solar PV cell development, breaking its own previous record of 24.7 %. This achievement is at research level, where Panasonic has used heterojuntion technology to improve conversion efficiency. Panasonic has placed electrodes on the back of the solar cell to improve efficiency. The other technologies used in this achievement is explained below by Panasonic: 1. Reduction in recombination loss A key feature of HIT technology is its ability to reduce the recombination loss of charge carriers, particles of electricity generated by light, through laminating layers of high-quality amorphous silicon on the surface of the monocrystalline silicon substrate, where power is generated. By utilizing the technology to form a high-quality amorphous silicon film on the monocrystalline substrate while minimizing damage to the surface of the substrate, it has been possible to realize a high temperature coefficient of -0.25% per degree Celsius which is able to maintain a high conversion efficiency even with high open circuit voltage (Voc) and at high temperatures. 2. Reduction in optical loss In order to increase the current in a solar cell, it is necessary to lead the sunlight which arrive at the cell's surface to the monocrystalline silicon substrate, which is the layer which generates the power...