1. Regioregularity Effects in Poly(3-hexylthiophene):PCBM-Based Solar Cells Incorporating Acid-Doped Polyaniline Nanotubes as an Interfacial Layer
- Author
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Yu-Kai Han, Pei-Chen Huang, and Yi-Jang Lee
- Subjects
Nanotube ,Materials science ,Renewable Energy, Sustainability and the Environment ,Exciton ,Condensed Matter Physics ,Metathesis ,Polymer solar cell ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,chemistry.chemical_compound ,Chemical engineering ,chemistry ,Polyaniline ,Materials Chemistry ,Electrochemistry ,Proton NMR ,Organic chemistry ,Layer (electronics) ,Electrical conductor - Abstract
We adopted the FeCl 3 and Grignard metathesis (McCullough) methods to synthesize three poly(3-hexylthiophene)s (P3HTs) exhibiting different degrees of regioregularity and then blended them with [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM) to obtain bulk heterojunction phases on the top of an acid-doped polyaniline nanotube (a-PANINT) interfacial layer. From integration of 1 H NMR spectra, we determined that the three P3HTs had head-to-tail coupling contents of 67, 81, and 96%, respectively. The photovoltaic (PV) performance of P3HT:PCBM-based devices fabricated without the a-PANINT interfacial layer increased as the regioregularity of the P3HT increased. The presence of the a-PANINT interfacial layer resulted in improved PV performances of the P3HT:PCBM-based devices. This improvement in the PV performance resulted from the highly conductive, controlled one-dimensional tubular nanoscale morphology of the annealed a-PANINT interfacial layer, which mediated the efficient migration of photogenerated holes to the buffer layer and suppressed exciton recombination.
- Published
- 2009
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