LONGi Green Energy’s Innovation Road

Recently, according to the latest certification report of the Solar Energy Research Institute of Hamelin (ISFH), Longi Green Energy has achieved a new breakthrough in the efficiency of its p-HJT cells made from self-developed Ga-doped p-type silicon wafers: on Ga-doped p-type full-size (M6, 274.3cm²) monocrystalline silicon wafers, Longi Green Energy has pushed up the conversion efficiency of its p-HJT cells to 26.12%. This is the highest p-type silicon cell efficiency record to date, further validating the feasibility of low-cost silicon heterojunction mass production technology.

Since April 2021, LONGi Green Energy has set a new world record for cell conversion efficiency 11 times.

Dr. Xu Xixiang, Vice President of LONGi Green Energy Central Research Institute, said, "Every 0.01 percentage point increase in cell conversion efficiency is significant."

As a leading global solar energy technology company, LONGi Green Energy has always taken "making good use of the sun's rays to create a green energy world" as its mission, insisted on innovation and value creation, and promoted cost reduction and efficiency increase through high intensity R&D investment to maximize customer value and promote PV as an affordable clean energy source.


From the accumulation of semiconductor technology to promoting the technological revolution in the field of monocrystalline silicon wafers, from promoting monocrystalline back to the mainstream to formally proposing to change the ecology of the earth with solar energy technology, and then to laying out the green hydrogen energy industry, Longi Green Energy has come a long way, recording the development and changes of the photovoltaic industry and leading the change of the energy industry.

And in this, innovation is always running through.


Focus on monocrystalline technology revolution

The development and growth of China's photovoltaic industry for decades has been based on continuous innovation. And Longi Green Energy, from the very beginning, has carried the gene of innovation.

Sixteen years ago, when most of the market was optimistic about the polycrystalline route, Longi Green Energy, which was new to the photovoltaic industry, firmly chose the monocrystalline route, which was not favored at that time, after strategic research and judgment. It would have been difficult to make this choice without a firm belief and a sense of innovation.

Of course, this is not a matter of impulse, but a result of the management team's insight into the "first principle" of the PV industry - the lowest cost of electricity.

Since then, LONGi Green Energy has been committed to the promotion and application of monocrystalline technology.

The big turnaround came in 2012. At that time, LONGi Green Energy boldly adopted the expensive and still immature diamond wire slicing technology. The subsequent facts proved that this choice was the right one. Data showed that the adoption of diamond wire cutting technology increased the cutting speed of monocrystalline silicon wafers by 2-3 times, and with the reduction of losses, the wafer yield increased by 15%. The adoption of technologies such as diamond wire has led to a 79% decrease in monocrystalline wafer costs in 2019 compared to 2011. Since then, the cost-performance advantage of monocrystalline products began to emerge, and Longi Green Energy entered its own rapid growth period and became the leader in PV technology in the monocrystalline field.

By October 2013, Longi Green's annual silicon wafer shipments exceeded 1GW, and it became the world's largest monocrystalline silicon wafer supplier in that year.

By October 2015, Longi Green's monocrystalline silicon achieved 100% slicing capacity switching to diamond wire slicing, and after two years of technology research and development, it has thin slicing technology as thin as 110μm.

The "power" of diamond wire is much more than that. According to the relevant data at the time, after adopting diamond wire slicing, the domestic PV industry as a whole can save about 30 billion yuan per year.

Leading the industry Industrial upgrading

Facing the downstream market, which was dominated by polysilicon at that time, the further development and growth of Longi Green Energy still faced the problem of market recognition.

Li Zhenguo, founder and president of Longi Green Energy, said, "The industry did not fully recognize the value of monocrystalline at that stage, and was even hindering the development of this route. Monocrystalline export prices are very expensive, many downstream enterprises also view monocrystalline as a high-end niche market, think sell expensive, earn more, which actually hinders the transmission of monocrystalline value to the terminal."

In addition, almost all of the downstream cell and module manufacturers are in the polycrystalline technology layout of a large number of capacity, and let them change the route is tantamount to "to kill".

In this case, Li Zhenguo decided to open this road by himself. 2014 November, Longi Green Energy acquired 85% of the equity of Zhejiang Le Ye PV Technology Co. This marked the official expansion of Longi Green Energy into the solar cell and module business, and began to promote monocrystalline products directly to end power plant customers.

In 2015, the country launched the "runner-up program", which put forward higher requirements for the conversion efficiency of PV modules. At that time, only 20% of polycrystalline products could meet the standard, while 80% of monocrystalline products met the requirements.

With the support of the policy, the business expansion of Longi Green Energy spread rapidly, and the revenue quickly soared from 3.68 billion yuan in 2014 to 80.932 billion yuan in 2021.

Of course, this is also inseparable from the importance of Longi Green Energy for technology research and development. Over the years, Longi Green Energy has always spared no effort in scientific and technological innovation, and continues to lead the development of the industry.

In terms of technology research and development, LONGi Green Energy continues to challenge monocrystalline PERC technology. At that time, the technology was relatively mature in overseas development, but still had the problem of high initial attenuation. LONGi Green Energy not only invested a lot of R&D resources to organize research, but also made the low attenuation technology - LIR (Light-induced Regeneration) technology public to the industry. A year later, LONGi Green Energy further disclosed the solution and gradually dominated the rapid rise of the monocrystalline market. LONGi Green Energy's Hi-MO series modules continue to innovate and become the leader in the module market.

The global market share of monocrystalline is also climbing, from less than 20% in 2014 to 72% in 2019.

Photovoltaic Technology Energy Transformation

With the "double carbon" target set by countries around the world, the global energy transition stands at a new crossroads, and accelerating the deployment of renewable energy such as photovoltaic has become a global consensus.

In 2018, LONGi Green Energy put forward the development concept of "Solar for Solar", innovatively promoted "manufacturing clean energy with clean energy" in the PV industry, and committed to building the first "zero carbon factory" in the PV industry. Zero Carbon Factory" in the PV industry.

In 2020, LONGi Green Energy joined the RE100, EV100 and EP100 initiatives, becoming the first Chinese company to join the three "100" initiatives of climate organizations at the same time, and joined the Science Based Carbon Target (SBTi) initiative in response to the CDP climate change questionnaire, starting the road of climate action for LONGi Green Energy.

In addition, LONGi Green Energy has also set its development target on hydrogen energy and formulated a new development strategy of Green Power + Green Hydrogen. ".

According to Li Zhenguo, the future demand for green hydrogen is huge, and as the cost of photovoltaic power continues to decrease, the photovoltaic-electrolysis route, which uses photovoltaic power generation to produce green hydrogen by electrolysis, is expected to become the cheapest method to produce green hydrogen. This will undoubtedly provide a huge opportunity for the development of the photovoltaic industry.

Photovoltaic applications go far beyond this, and can also be used for desalination and desert irrigation to green the desert and improve vegetation coverage. When 70% of the earth's desert becomes an oasis, it will absorb all the carbon emissions caused by human activities, realizing the real negative carbon development, and finally making PV play a positive role in repairing the earth's ecology.

Now, the "TaiWa era" has arrived. Li Zhenguo believes that the top priority of the current and future development of the global PV industry is still to focus on the main track of battery efficiency improvement, strengthen the investment in the research and development of new battery materials and technologies, do a good job in scientific and technological innovation, devote to reducing costs and increasing efficiency, improve the competitiveness of the PV industry, and promote the large-scale application of clean energy.

This kind of continuous innovation, for Longi Green Energy, is always only a work in progress, not a finished time. And this time the innovation has a new result. This new achievement will be officially released to the public on November 2, so please look forward to it.

Post time: Nov-01-2022