The Role of Solvent Environment on the Optical Behavior of Chemically Synthesized Silicon Nanoparticles

Table 4

The maximum and minimum values of the extinction coefficient at the band gap region of Si-NPs in different solvents.

Solvents		λ (nm)	hν (eV)		λ (nm)	hν (eV)		λ (nm)	hν (eV)
DMSO	46.97	272	4.56	8.75	216	5.74	13.90	456	2.72
DMF	49.20	600	2.10	15.9	192	6.46	45.95	552	2.25
Acetonitrile	37.70	228	5.44	0.68	500	2.48	1.64	368	3.37
Ethanol	34.45	220	5.64	3.41	416	2.98	4.82	352	3.52
Dioxane	40.80	284	4.37	3.03	216	5.74	7.83	380	3.26
Ethyl acetate	13.61	256	4.85	3.41	204	6.10	14.4	492	2.52
Chloroform	35.90	248	5.00	0.33	584	2.21	1.57	420	2.95
THF	42.16	280	4.43	2.31	236	5.26	22.45	316	3.93
1,2-Dichloroethane	34.17	288	4.31	0.91	188	6.60	9.69	376	3.29
Benzene	28.18	284	4.37	0.00	388	3.20	0.42	328	3.78
Toluene	27.73	288	4.31	1.23	228	5.44	4.30	344	3.61
Carbon tetrachloride	51.86	272	4.56	7.98	244	5.08	29.44	352	3.52
Trichloroethylene	20.16	284	4.37	0.00	600	2.07	3.37	356	3.49
Hexane	39.92	244	5.08	0.22	340	3.65	1.22	348	3.56