TY - JOUR
T1 - Boron removal for solar-grade silicon production by metallurgical route
T2 - A review
AU - Chen, Hui
AU - Morita, Kazuki
AU - Ma, Xiaodong
AU - Chen, Zhiyuan
AU - Wang, Ye
PY - 2019
Y1 - 2019
N2 - Solar energy has received considerable attention over the past few decades, due to its importance as a green and renewable energy. Low-cost solar-grade silicon production is critical for the widespread use of solar cells. Conventional routes (e.g., modified Siemens process: chlorosilane and hot filament) have still dominated the production of solar-grade silicon. The metallurgical route offers benefits in the productivity and cost, but efficient removal of boron is one of the most daunting challenges in front of us. This paper reviews thermodynamic and kinetic properties (solubility, diffusivity, diffusion coefficients, mass transfer rate, and activity coefficient) of boron and recent research topics (slag treatment, solvent refining, gas injection, plasma treatment, and acid leaching) for boron removal.
AB - Solar energy has received considerable attention over the past few decades, due to its importance as a green and renewable energy. Low-cost solar-grade silicon production is critical for the widespread use of solar cells. Conventional routes (e.g., modified Siemens process: chlorosilane and hot filament) have still dominated the production of solar-grade silicon. The metallurgical route offers benefits in the productivity and cost, but efficient removal of boron is one of the most daunting challenges in front of us. This paper reviews thermodynamic and kinetic properties (solubility, diffusivity, diffusion coefficients, mass transfer rate, and activity coefficient) of boron and recent research topics (slag treatment, solvent refining, gas injection, plasma treatment, and acid leaching) for boron removal.
KW - Boron removal
KW - Gas injection
KW - Slag treatment
KW - Solar-grade silicon
KW - Solvent refining
UR - http://www.scopus.com/inward/record.url?scp=85071984699&partnerID=8YFLogxK
U2 - 10.1016/j.solmat.2019.110169
DO - 10.1016/j.solmat.2019.110169
M3 - Review article
AN - SCOPUS:85071984699
SN - 0927-0248
VL - 203
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
M1 - 110169
ER -