LONGi's HBC Solar Cells Set New Efficiency Record at 27.09%

ONGi Green Energy Technology Co., Ltd., a frontrunner in solar tech, has once again raised the bar in the industry by achieving a remarkable 27.09% efficiency with their crystalline silicon heterojunction back-contact (HBC) solar cells. This rate surpasses their own previous record of 26.81% set in November 2022.

Heterojunction solar cells represent a blend of two distinct technologies: they consist of a crystalline silicon core surrounded by layers of amorphous "thin-film" silicon. This design enhances the efficiency and offers a cost-effective alternative to conventional solar panels. Additionally, the back-contact configuration of these cells ensures that the front side is completely focused on light absorption, further improving their performance.

In creating a record-setting 27.09% efficient HBC cell, LONGi moved away from the traditional and costlier photolithography process typically used in back-contact cell production. Instead, they adopted an all-laser patterning technique, which not only boosted the cell's efficiency but also significantly cut down on production costs. Discover reliable local solar companies for efficient energy solutions tailored to your needs. Support sustainability in your community today!

Additionally, the manufacturer has successfully reduced the usage of indium in the production of transparent conductive oxide layers (ITO), a crucial component in solar cells. Their new cell features an ultra-thin TCO layer that uses only 20% of the indium required for traditional HBC solar cells. This not only improves efficiency but also tackles the dual challenges of cost and resource scarcity in solar cell production.

LONGi's latest accomplishment is part of a series of innovations. This November, the company announced a staggering 33.9% efficiency for a perovskite-silicon tandem solar cell, further showcasing its strong position in the solar technology field.

Tandem cell efficiency refers to the ability of a solar cell composed of multiple layers to achieve higher efficiency by combining different semiconductor materials.

Sources:

https://www.longi.com/en/news/heterojunction-back-contact-battery/

https://www.longi.com/en/news/propelling-the-transformation/

https://www.sunvalue.com/posts/longi-sets-new-record-with-33-9-tandem-cell-efficiency