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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Solar Cell Silicon
Presentation Title K-19: The Effect of Rapid Heat Treatment on Crystal Defect Evolution and Electrical Properties of the Original High Efficient Polycrystalline Silicon
Author(s) Hongyuan Shen, Longzhong Gao, Kuiixan Wei, Wenhui Ma, Shaoyuan Li
On-Site Speaker (Planned) Kuiixan Wei
Abstract Scope The study adopts the industrialized production of native efficient poly-Si wafers, the insulation of the 120s rapid heat treatment experiment under different temperatures has been carried out, explore annealing before and after the evolution of the poly-Si crystal defects such as grain boundary and dislocation and change of electrical properties. After 1200℃ annealing, dislocation density of ply-Si down to 710cm-2 by 1120cm-2, a drop to 36.61%. At the same time, the high Σ value (Σ27), a 1.62% reduction in grain boundary, Σ3 grain boundaries increased by 3.19%. After heat treatment, the minority carrier lifetime of sample can increase by up to 0.6μs. In addition, the size of grain would increase and the dislocation density reduced when grain orientation wasn’t changed during heat treatment. The results show that the improvement of the performance of poly-Si is related to the crystal structure of the silicon.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Boron Removal from Ferrosilicon Alloy via Slag Treatment
Crystal Growth Mechanism of Si in Hypereutectic Al-Si Melt during the Electromagnetic Directional Solidification
Enhancement of Efficiency in Nanostructured-Si Solar Cells by Employing Doped-graphene Transparent Conductive Electrodes
Influence of Chemical and Heat Treatment on the Properties of Disi Raw Sandstones in Jordan
K-17: High Temperature Pressure Filtration Applying for Separation of Silicon and Liquation Agent
K-18: Leaching of Indium from ITO Present in Amorphous Silicon Photovoltaic Modules
K-19: The Effect of Rapid Heat Treatment on Crystal Defect Evolution and Electrical Properties of the Original High Efficient Polycrystalline Silicon
Removal Impurities from Metallurgical Silicon by Slag Treatment Combined with Acid Leaching
Review of Solar Silicon Recycling
Solar Silicon by Direct Carbothermic Reduction - Review and Outlook
Structure Nature of Boron Removal from Silicon in Slagging Refining: A Raman Spectroscopy and NMR Spectroscopy Study
The Mechanism of Boron Removal from Silicon Alloy by Electric Field Using Slag Treatment
Thermo-Calc of the Phase Diagram of Calcium Silicon (Ca-Si) System
Thermo-Calc of the Phase Diagram of the Fe-Si System
Three-dimensional Crystal-plasticity based Model for Intrinsic Stresses in Multi-junction Photovoltaic

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