A dendrite is a thin, threadlike spike made of a pure crystalline substance, like silicon. With the aim of producing low cost, highly efficient solar cells, the dendrite silicon are manufactured for the production of solar cells. These are also known as silicon web dendrite solar cells. A 0.5 x 12 in. silicon dendritic web with resistivity, thickness, and crystal characteristics was created for such device goals.
During the pilot run, silicon dendritic web N-on-P solar cells measuring 1.27 x 30.5 cm were produced. In order to guarantee a yield of 75 of 9 minimum efficient cells, processes were developed. Based on solar cell efficiency, the yield was distributed as 9, 100, 10, 68, or 11, 18. During the imbalanced pilot line’s operation, the overall physical yield was 78.
What is a Dendritic Web Technique?
A dendritic web technique is a process for creating polycrystalline silicon sheets in which silicon dendrites are gently removed from a silicon melt; when the web of silicon rises from the melt and cools, it solidifies in between the dendrites.
Surface tension and crystallographic forces interact to produce the ribbon shape, avoiding any potential contamination from shaping dies. In order to “dope” the crystals to the required conductivity type and resistivity, growth takes place from a melt.
Rejected solutes easily diffuse away from the growth front, resulting in extremely effective impurity segregation, similar to Czochralski growth. Because of the material’s high structural quality, dendritic web material can be processed using any customary semiconductor processing method that is compatible with an orientation.
Also Read: What is Difference Between String And Array In Solar Panel?
What is the Growth of Dendritic Web Silicon Ribbon Crystals?
The crystallographic and surface tension forces, rather than shaping dies, are utilised to control crystal shape in the silicon dendritic web, a unique mechanism of ribbon growth. Solar cells built from single crystal webs, which are generally 2-4 cm wide, have AM1 conversion efficiency of up to 15.5 percent.
Because silicon webs successfully separate metal impurities from the melt during crystallisation, it seems possible to employ less expensive, less pure silicon as a feedstock for crystal development.
According to recent experiments discussed here, increasing growth output rates can be done by adjusting the thermal profiles of both the melt from which the crystal forms and the web itself. The enhancements result from reduced stress inside the crystals and improved latent heat dissipation. Melt replenishment during growth will be necessary to maintain high output rates for extended durations.
