Approaches to the development of environmentally friendly and resource-saving technology for solargrade silicon producti
- PDF / 1,129,743 Bytes
- 11 Pages / 432 x 648 pts Page_size
- 93 Downloads / 188 Views
MRS Advances © 2019 Materials Research Society DOI: 10.1557/adv.2019.311
Approaches to the development of environmentally friendly and resource-saving technology for solargrade silicon production Sergey M. Karabanov1, Dmitriy V. Suvorov1, Dmitry Y. Tarabrin1, Evgeniy V. Slivkin1, Andrey S. Karabanov2, Oleg A. Belyakov2, Andrey A. Trubitsyn1 and Andrey Serebryakov1 1
Ryazan State Radio Engineering University, 59/1 Gagarina St., Ryazan 390005, Russia
2
Helios Resource Ltd., 126 Proletarskaya St., Saransk 430001, Mordovia, Russia
ABSTRACT Currently, the main material for the production of solar cells is still silicon. More than 70% of the global production of solar cells are silicon based. For solar-grade silicon production the technologies based on the reduction of silicon from organosilicon compounds are mainly used. These technologies are energy-consuming, highly explosive and unsustainable. The present paper studies the technology of purification of metallurgical-grade silicon by vacuum-thermal and plasma-chemical treatment of silicon melt under electromagnetic stirring using numerical simulation and compares this technology with the existing ones (silane technologies and Elkem Solar silicon (ESS) production process) in terms of energy consumption, environmental safety and the process scalability. It is shown that the proposed technology is environmentally safe, scalable and has low power consumption. The final product of this technology is multicrystalline silicon, ready for silicon wafer production.
INTRODUCTION The ecological safety of production is the most important factor of its development. Currently, the requirements for the production environmental safety are very high; therefore, the research and development of new technologies and equipment that provide a new, higher level of environmental safety are carrying out. The development of renewable energy, including photovoltaics, is also associated with ensuring the ecological safety.
Downloaded from https://www.cambridge.org/core. Columbia University - Law Library, on 08 Aug 2019 at 07:56:40, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1557/adv.2019.311
The world market for photovoltaic systems as of 2016 was 76.6 - 77.3 GW [1]. The market was growing rapidly, so in the period of 2010-2016 a steady growth of up to 40% was observed. Currently mono- and multicrystalline silicon is the basic material for solar cell production: 94% of the total solar cell production as of 2016 [1]. The basic solar-grade silicon production processes are as follows: metallurgical-grade silicon production by the carbothermic reduction from SiO2 in arc furnaces; production of mono- and multicrystalline silicon for solar cells. All the aforementioned productions have high energy consumption, use environmentally harmful and explosive substances [1]. Currently, investigations for the development of new environmentally friendly technologies for solar-grade silicon production are carried out [1-13, 17, 18]. T
Data Loading...
