- The Institute for Solar Energy Research Hamelin (ISFH) in Germany, issued an inspection report on JA Solar’s Bycium+ battery which achieved a market leading breakthrough.
- The battery open circuit voltage created the highest score in the entire commercial TOPCon battery sector, reaching 748.6mV.
- This result surpasses the current BC world record battery opening voltage and reaches the passivation level of HJT batteries.
- The data not only sets a new milestone in the development of crystalline silicon cells, but also proves once again the huge efficiency-improving potential of TOPCon technology.
ISFH is a world-recognized third-party authoritative testing organization. The efficiency records tested have been recognized by the “Solar Cell Efficiency Record Table” led by Professor Martin Green, the “Father of Solar Energy”.
The Bycium+ battery’s achievement of the highest open circuit voltage performance of crystalline silicon cells this time not only reflects JA Solar’s deep R&D capabilities in the field of n-type technology, but also demonstrates to the industry the practical prospects of passivation technology in improving battery efficiency.
As we all know, there are two major entry points for improving the efficiency of photovoltaic cells, namely improving optical benefits and electrical benefits. Among them, the electrical gain mainly comes from reducing the recombination of electrons and holes and the loss of contact resistance, and the open circuit voltage is directly related to the recombination of carriers in the battery. Therefore, the open circuit voltage is always the core indicator of photovoltaic cell performance, directly It determines the potential of photovoltaic cell efficiency improvement and is also the determining factor of the temperature coefficient of photovoltaic modules.
On this basis, passivation technology is of great significance for improving open circuit voltage and battery efficiency. This technology can effectively reduce the internal recombination loss of electrons and conduct more electrical energy out. By continuously optimizing the passivation structure of TOPCon cells, JA Solar continuously reduces surface recombination, body recombination and metal recombination.
The record open circuit voltage has effectively pushed TOPCon technology towards its theoretical efficiency limit, laying a solid foundation for the future high-quality development of the photovoltaic industry.
As the world’s leading new energy power generation solution platform company, JA Solar has always placed technology research and development as its strategic priority. Its investment in capital, talent and other resources has always been at the top level in the industry, and it continues to push battery technology to the extreme. In the future, JA Solar will continue to carry out in-depth innovation, focus on end customer value, and open prospects for the development of the global new energy market.
Author: Bryan Groenendaal
