heterojunction solar cells

University of New South Wales researchers have identified four failure modes caused by damp heat in heterojunction solar panels with a glass-back sheet configuration. The failures could result in power losses ranging from 5% to 50%.

Huasun’s new PV modules have an open-circuit voltage of 49.46 V, a short-circuit current of 17.57 A, and a fill factor of 83.29%. Germany’s TÜV SUD has confirmed the results.

Chinese researchers have developed a new passivation technique for shingled solar panels based on tunnel oxide passivated contacts (TOPCon) or heterojunction (HJT) tech. It reduces recombination losses in the cell-to-module process and reportedly increases open-circuit voltage, fill factor, and efficiency.

Longi said it has achieved a 26.81% efficiency rating for an unspecified heterojunction solar cell, as confirmed by Germany’s Institute for Solar Energy Research Hamelin (ISFH).

Germany’s Fraunhofer ISE is applying its FlexTrail-printing technology to the direct metallization of silicon heterojunction solar cells. It said the technique reduces the use of silver, while maintaining high efficiency levels.

Indian manufacturer Goldi Solar has unveiled a 710 Wp bifacial solar module based on heterojunction (HJT) technology. The module is built with 132 half-cells and has a conversion efficiency of up to 22.85%.

A Dutch research group has developed a passivation technique for heterojunction solar cells based on a hydrogenated amorphous silicon layer. Their cell achieved an in-house-certified power conversion efficiency of 24.18%, an open-circuit voltage of 726.0 mV, a short-circuit current of 39.97 mA/cm2, and a fill factor of 83.3%.

An international research group has reconstructed the trajectory of p-type wafers in the heterojunction solar cell segment and has identified the lack of knowledge about boron-oxygen related light-induced degradation (BO-LID) as the main cause for the limited adoption of these wafers and the success of their n-type counterparts. According to the scientists, however, there is still big room for improvement for p-type technologies in heterojunction cells.

Scientists from the Fraunhofer ISE built a bifacial heterojunction solar cell with a power conversion efficiency of 21.7% via rotary screen printing. They used a machine that is able to achieve a cycle time of just 0.6 seconds per solar cell and enables a strong reduction in silver use.

Germany’s Institute for Solar Energy Research Hamelin has confirmed that Longi’s new n-type heterojunction solar cell has achieved a power conversion efficiency of 26.5%.