Dr.G.Čikvaidze (LU CFI)
„Jauna solārā Si iegūšanas tehnoloģija”
Solar energy is potentially capable of supplying most of the global need for primary energy, and it is expected to become an alternative source for fossil fuels as a clean energy. About 95% of the current solar cell module market is based on solar cells using silicon as raw material, of which about 60% is polycrystalline silicon. The power conversion efficiency of solar cells is largely dependent on impurity levels in the silicon.
The present solar silicon production technology uses the so-called trichloristane (THS) method for purification of the raw material.
The traditional technology is characteristic of main problems as follows
- A low reduced silicon layer growth speed (~10µm /min.).
- High cost of the final product
- Very dangerous are also the process of gaseous raw materials – trichlorsilane, chlorine, hydrogen, the reactivity of which – corrosive aggressiveness, toxicity and explosion danger raise the price of the reactor building, demand additional security resources for protection of the personnel and the surrounding environment.
- To investigate quartzite reducing process specifics when in the reaction applied are alternative reducing substance nanopowders (for example, SiC or other materials)
- To experimentally investigate efficient silicon admixtures purification processes by using the electron beam remelting method; to search optimal process methods and conditions in order to minimise the quantity of the processed silicon admixtures
- To establish a mathematical model and programme modules in order to comprehend and model the many-sided physical processes course during silicon purification, for example, fields of temperature and mechanical pressure, phenomena on solid- liquid phase boundary surface, the course of crystallization, etc.
 „Jauna solārā Si iegūšanas tehnoloģija” un M.Haļitovs, L.Avotiņa (LU maģistranti) „Oglekļa kompozītmateriālu kompleksā analīze”){kind=link}