TY - JOUR
T1 - Layered TiO2 :PVK nano-composite thin films for photovoltaic applications
T2 - TTiO2 :PVK nano-composite thin films
AU - Kaune, G.
AU - Wang, W.
AU - Metwalli, E.
AU - Ruderer, M.
AU - Roßner, R.
AU - Roth, S. V.
AU - Müller-Buschbaum, P.
PY - 2008/5
Y1 - 2008/5
N2 - The influence of the solvent used for spin-coating on the homogeneity of poly(N-vinylcarbazole) (PVK) films is investigated. Homogenous films are obtained only by the use of toluene, solution in tetrahydrofuran (THF) and chloroform results in radially oriented inhomogeneities and films prepared by use of N-methylpyrrolidone and dimethylacetamide show particle formation during spin-coating. Layered nano-composite thin films are prepared by spin-coating a PVK film on top of a nano-structured titanium dioxide ( TiO2 layer. The TiO2 thin films are prepared by a sol-gel process using an amphiphilic copolymer as structure-directing agent. Structural characterisation of the TiO2 :PVK nano-composite films is done by field emission scanning electron microscopy (FESEM) and grazing-incidence small-angle scattering (GISAXS). Bare TiO2 films are probed for comparison. Light is basically only absorbed in the ultraviolet regime and absorption slightly increases upon addition of PVK, which makes the layered TiO2 :PVK nano-composite thin films good candidates for UV photovoltaic devices. Furthermore, absorption remains stable over a period of several days.
AB - The influence of the solvent used for spin-coating on the homogeneity of poly(N-vinylcarbazole) (PVK) films is investigated. Homogenous films are obtained only by the use of toluene, solution in tetrahydrofuran (THF) and chloroform results in radially oriented inhomogeneities and films prepared by use of N-methylpyrrolidone and dimethylacetamide show particle formation during spin-coating. Layered nano-composite thin films are prepared by spin-coating a PVK film on top of a nano-structured titanium dioxide ( TiO2 layer. The TiO2 thin films are prepared by a sol-gel process using an amphiphilic copolymer as structure-directing agent. Structural characterisation of the TiO2 :PVK nano-composite films is done by field emission scanning electron microscopy (FESEM) and grazing-incidence small-angle scattering (GISAXS). Bare TiO2 films are probed for comparison. Light is basically only absorbed in the ultraviolet regime and absorption slightly increases upon addition of PVK, which makes the layered TiO2 :PVK nano-composite thin films good candidates for UV photovoltaic devices. Furthermore, absorption remains stable over a period of several days.
UR - http://www.scopus.com/inward/record.url?scp=44449091891&partnerID=8YFLogxK
U2 - 10.1140/epje/i2007-10292-2
DO - 10.1140/epje/i2007-10292-2
M3 - Article
AN - SCOPUS:44449091891
SN - 1292-8941
VL - 26
SP - 73
EP - 79
JO - European Physical Journal E
JF - European Physical Journal E
IS - 1-2
M1 - 73
ER -
