... Se/Si5/O/Si5(001) 14, 62 14. 53 33.07 Se/Si5/S/Si5 (001) 14. 64 14. 59 34. 28 Se/Si5/Se/Si5 (001) 14. 66 14. 66 34. 79 Se/Si6/O/Si6(001) 14, 42 7.31 38.57 Se/Si6/S/Si6 (001) 14. 47 7.33 39.80 ... Sci.) , 44 , p. 8 74 Hybertsen M.S. and Louie S.G. (1985). First-Principles Theory of Quasiparticles: Calculation of Band Gaps in Semiconductors and Insulators, Phys. Rev. Lett. 55, p. 141 8 Hybertsen ... light emitting diode .Nature , ,41 0 :p.192 - 1 94. Pavesi L ,Dal Negro L ,Mazzoleni C ,et al. (2000), Optical gain in silicon nanocrystals. Nature , ,40 9 :44 0 - 44 4. Petersilka M , Gossmann U...