Global advanced technology! Laser transfer equipment order opening and delivery

Surface metallization is one of the key steps in the preparation of photovoltaic cells, which has a crucial impact on the efficiency, cost, and performance of the cells. Therefore, the optimization of metallization process is an area that various battery manufacturers focus on in order to achieve cost reduction, and it is also a focus of attention in the photovoltaic industry.

The major technological change in the photovoltaic industry is currently shifting from P-type to N-type batteries. Compared with traditional P-type single crystal batteries and P-type polycrystalline batteries, N-type batteries have advantages such as high conversion efficiency, high double-sided rate, low temperature coefficient, no light decay, good weak light effect, and longer carrier life. However, silver slurry accounts for a large proportion of non silicon costs, and the large-scale industrialization of N-type batteries must consider ways to reduce costs through metallization.

Laser transfer printing technology is a new type of non-contact printing technology, which mainly includes two steps: slurry filling and slurry transfer. Tyr Laser has been researching and developing laser printing related technologies for many years. In June 2021, Deere announced that it had completed the laser transfer printing mass production technology reserve and promoted the industrialization process with downstream leading enterprises; In December, the company stated that in the future, customers' new production lines will be delivered through complete sets of transfer printing equipment.

At the current time point, considering several technologies, the advantages of laser transfer printing are very obvious. The main advantage is that the grid line of laser transfer printing is thinner, so the slurry is saved more, and low-temperature silver slurry is also applicable; Laser transfer printing is non-contact printing, which can avoid problems such as cracks, fragments, pollution, scratches, etc. that exist in extrusion printing; At the same time, the future trend of silicon wafer thinning will bring more hidden crack problems. Laser transfer printing, due to non-contact printing, can effectively solve this problem. This technology can be applied in battery processes such as PERC, TOPCON, HJT, IBC, etc.

As a new non-contact surface metallization process, Deere Laser is the world's first laser transfer printing technology, suitable for the production of various types of high-efficiency solar cells such as PERC, TOPCon, HJT, IBC, etc. In the early stage, multiple sets of equipment have participated in experiments on different technical routes, which not only significantly saves silver slurry consumption and improves printing consistency, but also reduces the shading area, fragmentation rate, and other potential losses of the grid line, significantly reducing costs and increasing efficiency, and has broad application prospects.

In addition to technologies such as PERC laser ablation and SE laser doping, in the TOPCON battery process, Deere Laser also has relevant technical reserves such as laser boron doping, laser film opening, and special slurry slotting; In terms of HJT battery technology, the company's LIA laser repair technology has obtained mass production orders from customers; In terms of IBC battery technology, the company's laser slotting technology has obtained mass production orders; At the same time, the company is also conducting research and development related to perovskite batteries and obtaining orders.

In terms of components, the company has relevant technical reserves in thin film drilling, cutting, and laser non-destructive scoring, among which laser non-destructive scoring and tile stacking have been delivered with mass production equipment. In addition to the photovoltaic field, in the display panel industry, the company has conducted research and development and prototype trial production of laser repair processes for LCD/OLED and Mini LED. In the semiconductor packaging and application of laser micro hole processes in the electronic field, the company has obtained equipment orders and delivered them.