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Effect of the fused quartz particle density on nucleation and grain control of high-performance multicrystalline silicon ingots
- Source :
- Journal of Crystal Growth. 454:186-191
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- The nucleation process of high-performance multicrystalline silicon (HP mc-Si) growth seeded by fused quartz particles (FQP) through directional solidification is crucial for the ingot quality. To determine the optimal density of FQP and obtain a better nucleation process and the grain growth, we cast ingots using four different densities of FQP fixed on the bottom of the four quartz crucibles and covered them with a certain thickness of Si 3 N 4 coating. FQP sizes of 30–50 mesh were used, and the influence of the fused quartz particle density on the nucleation mechanism, initial grain uniformity, grain size, density of dislocation clusters, and cell efficiency were analyzed. Compared with the ingots seeded with other three densities of FQP, the 220 particles/cm 2 of FQP seeded ingot showed better uniformity of nucleation and initial grains. A large number of small uniform Si grains with lower density of dislocation clusters in the bottom of the ingot were observed. The average conversion efficiency of p-type solar cells manufactured with the 220 particles/cm 2 seeded ingot (18.28%) was 0.19% higher than that manufactured with the 120 particles/cm 2 seeded ingot (18.09%).
- Subjects :
- 010302 applied physics
Fused quartz
Materials science
Silicon
Metallurgy
Nucleation
chemistry.chemical_element
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Grain size
law.invention
Inorganic Chemistry
Grain growth
chemistry
law
0103 physical sciences
Materials Chemistry
Ingot
0210 nano-technology
Particle density
Directional solidification
Subjects
Details
- ISSN :
- 00220248
- Volume :
- 454
- Database :
- OpenAIRE
- Journal :
- Journal of Crystal Growth
- Accession number :
- edsair.doi...........7b745be772a9d9c5dd2e912e8e502c68