Efficiency and cost have always been two major factors considered by power station investors when investing in power stations. Products with both efficiency and cost advantages are particularly favored by investors. Efficiency is an important weight to reduce PV costs. The photovoltaic industry is in the field of pan-semiconductors and is equally applicable to Moore's Law. With cyclical, almost endless technological advances and iterations, the cost of photovoltaic power generation will be almost endlessly declining. At the same time, the photovoltaic market and industry scale will have a rapid expansion for decades. It is expected that by 2020, photovoltaic power generation is expected to achieve parity online.
This efficiency breakthrough, Zhonghua improved several technologies owned by 180CM solar NEDO. Reducing resistive losses through innovative heterojunctions allows the positive and negative charges in a solar cell to combine to generate heat rather than letting them run out of the device to generate electricity. In addition, Zhonghua also improved the energy harvesting efficiency of the interdigital electrodes of solar cells. Not only that, but the company also moved the electrode grid from the front end of the battery – the light-receiving area – to the rear, allowing more sunlight to enter the battery.
“However, material types, production processes, and alternative architectures are diverse,†said Kunta Yoshikawa, a member of Zhonghua’s solar cell research team. “We develop our own ( Chemical vapor deposition) technology, optical management and electrical contact technology to achieve 26.3% conversion efficiency."
Yoshikawa said that they hope to finally reach the theoretical limit of the technology by further improving the main properties of the battery - slightly higher than 29%.
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