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Influence of Seed Size on the Quality of High‐Performance Multicrystalline Silicon Ingots Grown by Fused Quartz Particle Seeding
Author(s) -
Mi Changcheng,
Ding Junjing,
Cai Yanhuan,
Zhou Bing,
Dong Hui,
Luo Jianming,
Huang Xinming
Publication year - 2019
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201800098
Subject(s) - ingot , materials science , nucleation , seeding , quartz , wafer , silicon , particle (ecology) , dislocation , particle size , composite material , directional solidification , brick , metallurgy , nanotechnology , microstructure , chemical engineering , chemistry , agronomy , alloy , oceanography , organic chemistry , engineering , geology , biology
The performance of high‐performance multicrystalline silicon ingots is studied as a function of fused quartz seed particle size. Four kinds of Si ingots are grown using fused quartz particles having four distinct particle sizes, seed Nos. 1–4, corresponding to mesh sizes of 10–30, 30–50, 50–70, and 70–100, respectively. Each seed type is employed to have the same particle density area of ≈220 particles per cm 2 . The experimental results show that the Si ingot grown using 50–70 mesh seeds (seed No. 3) has the best uniformity of initial nucleation and subsequent grains, resulting in the lowest density of dislocation clusters. The Si ingots are cut into bricks and Si wafers are sliced from different positions of each brick and further studied. As a result, the average conversion efficiency is the highest for the ingot grown using No. 3 seeds (50–70 mesh) at 18.34%, ≈0.22% (absolute value) higher than that observed when employing 10–30 mesh seeds (seed No. 1, 18.12%).