SILICON

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Solar Energy Conversion
BLACKBODY
HEAT
SUNLIGHT
SILICON
ELECTRICITY
FUEL (H2)
WATER DYE CATALYST
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J. Am. Chem. Soc. 1963, 85, 260.
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1A2u
p? (pz)
3A2u
h?
E
?

1A1g
Q(M-----M)
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1A2u
p? (pz)
3A2u
h?
E
?

1A1g
Q(M-----M)
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?(PtPt) 0.28(9) Å (Coppens et al.) ?(PtPt)
0.23(4) Å (Ozawa et al. 2003) ?(PtPt) 0.21 Å
(Rice and Gray, 1983)
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Vlcek Jr., A. Gray, H. B. J. Am. Chem. Soc.
1987, 109, 286-287. Vlcek Jr., A. Gray, H. B.
Inorg. Chem. 1987, 26, 1997-2001. Sweeney, R. J.
Harvey, E. L. Gray, H. B. Coord. Chem. Rev.
1990, 105, 23-34. Roundhill, D. M. Gray, H. B.
Che, C.-M. Acc. Chem. Res. 1989, 22, 55-61.
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Maverick, A. W. Gray, H. B. Science 1981, 214,
1201-1205.
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Ru(bpy)32 M(CN)84?
Ru(bpy)32M(CN)84?
Ru(bpy)3M(CN)83?
Mo kq 1.6 ? 108 M?1s?1 ?E 0.11 eV W
kq 2.0 ? 108 M?1s?1 ?E 0.36 eV
Ru(bpy)3 M(CN)83?
Mo ?CE 0.74 B?E 1.99 eV W ?CE
0.67 B?E 1.74 eV
h?
Ru(bpy)32 M(CN)84?
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CoII(dmgBF2)2(MeCN)2 (1)
CoII(dpgBF2)2(MeCN)2 (2)
E(CoII/I) -0.55 V vs. SCE
E(CoII/I) -0.28 V vs. SCE
first observed in 1986.
Bakac, A. Espenson, J. H. J. Am. Chem. Soc.
1984, 106, 5197-5202. Connolly, P. Espenson, J.
H. Inorg. Chem. 1986, 25, 2684-2688.
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Solar Fuel
oxygen
2H2O 2H2 O2
water
MoIV
MoV
sunlight
Co2
protons
hydrogen
Jillian Dempsey, Xile Hu
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NREL WATER-SPLITTING SOLAR CELL
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O2 cat anode
H2 cat cathode
Solar PV membrane