Abstract\n In the absence of fossil fuels, the sun is the major source of electrical energy. Due to increasing human need for clean energy sources, MSCs solar industry is growing very rapidly. High cost and low efficiency of solar cells is the main problem now. Efficiency solar cells is determined by the absorption spectrum with the intrinsic properties of the bulk semiconductor. MSCs have the ability to make silicon solar photons absorbed all the energy of the electrostatic free of them and dug and finally electricity. Due to the high price of raw materials and semi-conductor processes for converting raw materials into functional cells, production of these cells with very high cost. In this paper the quantum size effects of nano particles, quantum limitation, silicon, nano-crystal silicon, Silicon Quantum Dots, Silicon Quantum Dots in silicon carbide, QD silicon in silicon carbide, nano-structured solar cells, Silicon Quantum Dots, the main waste In a solar cell, solar cell efficiency with silicon quantum dot-Text.

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