Polycrystalline ingots increase the efficiency of solar panels

Through the optimization of the thermal field temperature and the grain refinement of the polycrystalline ingot, the nucleation of the crystal in the initial stage is controlled, and the crystallization speed and the degree of undercooling in the crystallization process are increased, thereby increasing the minority carrier lifetime of the silicon crystal , Reduces the internal defects of the silicon crystal and improves the efficiency of the polycrystalline silicon solar panel.

Shown in Figure 1, the preparation of large grains

Large grains scientific name to become quasi-single crystal is based on the polycrystalline ingot process, when the crystal growth through the partial use of single crystal seed crystal, appearance and electrical properties are similar to the single crystal polycrystalline silicon. The technique of forming single crystal silicon by ingot casting consumes only 5% more power than ordinary polycrystalline silicon, and the quality of the produced single crystal silicon is close to that of the single crystal silicon of Czochralski. Simply put, this technology is the cost of using polysilicon, the production of monocrystalline silicon technology Quasi-single crystal product advantages: the conversion efficiency is higher than normal polycrystalline, close to Czochralski cell; compared with ordinary polycrystalline cells LID basically no change, stable performance; Compared with ordinary polycrystalline, solar panel power increased significantly, the unit cost reduction; can package 265 watts (60 arrangement) large components.

2, adjust the thermal field structure, optimize the process

Since different temperature gradients lead to different crystal orientations, a <100> nucleation mechanism needs to be clear if nucleation defects need to be reduced. After inquiring, a temperature gradient greater than 186 degrees Celsius can satisfy the formation of <100> crystals To the temperature requirements.

By improving the process, adjust the thermal field structure, the growth rate can be controlled. After the improved polycrystalline ingot growth segment formulation, the crystal growth rate tends to be more stable, so that it is conducive to the uniform upward segregation of impurities. At the same time, the stability of the interface can be controlled to control the smooth precipitation of impurities. In the control interface level can achieve the consistency of nucleation, and to achieve uniform grain refinement technology. For the entire growth process, the micro-convex interface temperature is beneficial to the outward discharge of impurities, but too convex, will lead to 16 serious damage to the edge. By stabilizing the thermal field, optimizing the growth process and improving the growth interface, the goal of reducing the defect density and increasing the minority carrier lifetime of the silicon crystal is achieved. Finally, the goal of improving the efficiency of the silicon crystal solar panel is achieved.

Shenzhen Di Sheng Energy Technology Co., Ltd. was founded in 2009, is China's most professional small solar module manufacturers and solutions provider, the company mastered a variety of solar cell packaging and core research and development technology and small solar modules MPPT charging circuit and micro Light charging circuit. Continuous innovation and optimization, Di Sheng company's products have a unique core competencies.

Di Sheng Energy has always been adhering to the service concept of "innovating technology, serving customers and creating prices for customers' products". From the design requirements of customers, DiSheng Energy reforms and innovates the packaging technology of solar cells, giving our customers new competitiveness in solar energy application products. Di Sheng solar panels widely used in solar cell phones, mobile power, wearable devices, Bluetooth headset speakers, GPS, electric vehicles, outdoor lighting and other outdoor use of electronic products. In the company of all staff efforts, Di Sheng with exquisite appearance and superior electrical performance, met with ZTE, Mobile, Topband, Germany SINVALLEY companies such as the establishment of a good relationship of cooperation.