JA Solar Licenses IP Rights of Gallium-doped Silicon Wafers for Solar Cell Applications from Shin-Etsu Chemical

BEIJING, Oct. 10, 2019 -- JA Solar has reached agreement with Shin-Etsu Chemical of Japan to license its intellectual properties of using Ga-doped silicon wafers for solar cell applications. Shin-Etsu Chemical holds a number of patents on doping Ga in silicon crystals and using the Ga-doped p-type crystalline silicon wafers for making solar cells. An official ceremony of signing the agreement took place recently in Tokyo, Japan, has effectively granted JA Solar the IP rights over various nations and regions the patents covered.

It is well known that solar cells using boron doped p-type silicon wafers
have long suffered a so-called light induced degradation (LID) upon initial
light illumination. With the adoption of PERC cell structure in recent years,
the problem of LID associated with solar cells made from B-doped silicon wafers
becomes more severe. Using Ga-doped silicon wafers can effectively mitigate
such a problem that assures the performance of PV modules assembled with p-type
silicon-wafer based solar cells more stable and better in long-term energy
generation.

Mr. Jin Baofang, JA Solar's Chairman of Board of Directors, commented that
"using Ga-doped silicon wafers for solar cell application definitely
results in better performance of solar cells and PV modules, as well as the
improvement of their long-term reliability. Being the patent holder of several
leading technologies including bifacial PERC technology in China and other
countries, JA Solar has benefited from and always supports IP protection. We
deeply appreciate Shin-Etsu Chemical granting JA Solar their IP rights of
Ga-doped crystalline silicon technology, which is an important step for JA
Solar in introducing advanced technology and supporting the industry's
intellectual property protection. JA Solar will continue to develop and provide
high-performance PV products and clean-energy solutions to our customers
worldwide through technological innovation and continuous performance
improvement."

Source: JA Solar Co., Ltd.

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