Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 2, Issue 6, Pages 1573-1580Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am100085t
Keywords
nanorod arrays; anodic aluminum oxide (AAO); tetraphenylbenzidine; organic photovoltaics; conductive scanning force microscopy
Funding
- DPG [IRTG 1404]
- Ministry of Education. Science and Technology [R31-10013]
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We describe the synthesis and characterization of a cross-linkable siloxane-derivatized tetraphenylbenzidine (DTMS-TPD), which was used for the fabrication of semiconducting highly ordered nanorod arrays on conductive indium tin oxide or Pt-coated substrates. The stepwise process allow fabricating of macroscopic areas of well-ordered free-standing nanorod arrays, which feature a high resistance against organic solvents, semiconducting properties and a good adhesion to the substrate. Thin films of the TPD derivate with good hole-conducting properties could be prepared by cross-linking and covalently attaching to hydroxylated substrates utilizing an initiator-free thermal curing at 160 degrees C. The nanorod arrays composed of cross-linked DTMS-TPD were fabricated by an anodic aluminum oxide (AAO) template approach. Furthermore, the nanorod arrays were investigated by a recently introduced method allowing to probe local conductivity on fragile structures. It revealed that more than 98% of the nanorods exhibit electrical conductance and consequently feature a good electrical contact to the substrate. The prepared nanorod arrays have the potential to find application in the fabrication of multilayered device architectures for building well ordered bulk-heterojunction solar cells.
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