What are heterojunction technology (HJT) solar panels?

· About Solar Panels,PV Technology News

Many people choose to use solar power as a sustainable energy source in our ongoing pursuit of renewable energy. Solar panels have become more efficient and affordable over the years. HJT (Heterojunction) is a new technology that is gaining a lot of attention.

HJT solar panels is a combination of traditional silicon solar panels and new manufacturing techniques. This combination leads to better energy production and performance. Now, we will provide a detailed introduction to this innovative technology for you.

 HJT (Heterojunction technology)

What are HJT solar panels

The HJT solar panel is made up of three layers of photovoltaic materials. The panels use two types of technologies: crystalline silicon and amorphous "thin-film" silicon. These technologies work together to produce electricity.

HJT solar panels primarily consist of three key substances: crystalline silicon (c-Si), amorphous silicon (a-Si), and indium tin oxide (ITO).

The first layer, which is made of amorphous silicon, captures sunlight before it reaches the crystalline layer. It also captures any light that reflects off the layers below. The middle layer is made of single crystal silicon and its main job is to convert most of the sunlight into electricity.

The last layer is an additional layer of amorphous thin-film silicon located behind the crystalline silicon. This layer captures any photons that managed to pass through the first two layers.

The layer of amorphous silicon in HJT solar panels is important for enhancing performance. It helps reduce defects and electron recombination, which are common challenges faced by regular solar panels. This is done by acting as a passivation layer. Furthermore, the crystalline silicon layer helps to efficiently carry charges, making it easier for electrons to move within the battery structure.

Why choose solar panels with HJT technology

1.High conversion efficiency:

The PN junction in PERC technology is made of crystalline silicon, which is a type of homojunction cell. HJT solar panels is different from traditional PERC technology crystalline silicon solar cells. HJT is a junction made up of two different semiconductor materials.

The way it works is similar to regular solar cells, but the HJT cell has a thin layer of amorphous silicon that helps it convert sunlight into electricity more efficiently.Right now, many PV manufacturers have an average PERC efficiency of over 22%, and the average efficiency of HJT cells is up to 25%.

Besides that, HJT solar cells are designed to have more than 93% module bifaciality, meaning they can generate electricity from both sides of the module. For example, the Ecosolifer manufacturer located in Switzerland has produced a commercial bifacial HJT solar cell with 24.1% efficiency.

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2.Low temperature coefficient:

Thin-film solar energy using HJT solar panels has a lower temperature coefficient compared to regular crystalline silicon cells. HJT solar panels can generate power with an efficiency of over 23% at temperatures below 200 °C.

Additionally, they have a low temperature coefficient of -0.2%/K, which helps improve the cost-effectiveness and power output of photovoltaic systems.

This means that HJT solar panels can work well even in hot temperatures, allowing them to produce more energy in hot climates. This makes it possible to use these high-performance cells for large-scale power generation.

​​3. Fewer production steps:

In comparison to conventional solar panels produced using PERC technology, those produced using HJT solar panels have a reduced number of process stages, which results in an easier flow of production. The production of solar photovoltaic modules using HJT solar panels requires only 8 processes, compared to the approximately 13 required by PERC technology. As a result, it is becoming more financially feasible, which is encouraging for the future of solar energy, as the cost of the necessary equipment continues to decrease.

advatage of HJT

4.Long service life: 

HJT solar panels is known for its durability, meaning it lasts longer and requires less maintenance, resulting in lower costs. Ordinary solar panels typically last around 25 years. However, HJT solar panels can last up to 30 years under normal conditions.

This is because the amorphous silicon layer acts as a protective barrier, reducing degradation and preventing the appearance of PID effect. As a result, the lifespan of HJT batteries is extended.

Maysun Solar is dedicated to offering European customers solar modules that are unique, high-quality, and affordable. The product incorporates various technologies such as PERC, IBC, shingling, double-sided, half-cut, and more. To learn more about Maysun Solar's technology, please click the link below.


HJT technology

What is the development trend of HJT technology

The most popular and appealing solar cell technology in the market is PERC technology. It is considered the simplest option because upgrading the production line only requires adding extra equipment. On the other hand, manufacturing HJT solar panels solar panels requires purchasing a completely different set of production equipment.

HJT solar panels are much more efficient and advanced than PERC technology solar panels when it comes to solar cell development. Cell manufacturers and suppliers are increasingly interested in HJT solar panels due to its high power generation efficiency. The development of HJT solar panels relies heavily on customer preference, which will be determined by the future market.

HJT (Heterojunction) technology is revolutionizing the solar industry by providing increased energy production and improved efficiency. HJT solar panels combines amorphous silicon and crystalline silicon layers to overcome the limitations of traditional solar panels. This allows for a wide range of applications for solar energy.

Maysun Solar has been producing high-quality solar panels since 2008. We offer a variety of solar panels with different features like shingled, full black, double glass, etc. Besides that, Maysun will also produce HJT solar panels soon. These panels have excellent performance and a sleek design that can easily blend in with any building. 

Maysun Solar has set up offices and warehouses in multiple countries. They have also formed long-term partnerships with outstanding installers. If you have any questions about the latest solar panel quotes or anything related to PV, please don't hesitate to reach out to us.

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