TY - JOUR
T1 - Morphology and stoichiometry control of hierarchical CuInSe 2/SnO 2 nanostructures by directed electrochemical assembly for solar energy harvesting
AU - Sun, Juan
AU - Sun, Cheng
AU - Batabyal, Sudip K.
AU - Tran, Phong D.
AU - Pramana, Stevin S.
AU - Wong, Lydia H.
AU - Mhaisalkar, Subodh G.
PY - 2012/2
Y1 - 2012/2
N2 - CuInSe 2/SnO 2 core-shell and hierarchical branched nanostructures were produced by directed electrochemical assembly. By changing the spatial electric field along the deposition region, we can control the morphology and stoichiometry of deposited product from In-poor-CuInSe 2 nanoparticles to near stoichiometry CuInSe 2 branched nanowires. A combination of FESEM, TEM, XRD and Raman spectroscopy investigations reveals that both morphology and chemical compositions of CuInSe 2 strongly depend on the spatial electric field distribution on the SnO 2/Si substrate. We observed that higher reducing potential can assist the formation of CuInSe 2 with uniform coverage at the cathode side, but only In-poor-CuInSe 2 nanoparticles are formed on the anode side. Optical and photo-electrochemical examination confirmed the potential application of these core-shell nanostructures for solar energy harvesting.
AB - CuInSe 2/SnO 2 core-shell and hierarchical branched nanostructures were produced by directed electrochemical assembly. By changing the spatial electric field along the deposition region, we can control the morphology and stoichiometry of deposited product from In-poor-CuInSe 2 nanoparticles to near stoichiometry CuInSe 2 branched nanowires. A combination of FESEM, TEM, XRD and Raman spectroscopy investigations reveals that both morphology and chemical compositions of CuInSe 2 strongly depend on the spatial electric field distribution on the SnO 2/Si substrate. We observed that higher reducing potential can assist the formation of CuInSe 2 with uniform coverage at the cathode side, but only In-poor-CuInSe 2 nanoparticles are formed on the anode side. Optical and photo-electrochemical examination confirmed the potential application of these core-shell nanostructures for solar energy harvesting.
KW - CuInSe solar cells
KW - CuInSe /SnO core-shell nanostructure
KW - Directed electrochemical assembly
KW - Electrochemical deposition
KW - Hierarchical branched nanostructure
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U2 - 10.1016/j.elecom.2011.11.015
DO - 10.1016/j.elecom.2011.11.015
M3 - Article
AN - SCOPUS:84855698774
SN - 1388-2481
VL - 15
SP - 18
EP - 21
JO - Electrochemistry Communications
JF - Electrochemistry Communications
IS - 1
ER -