Abstract
We have investigated the performance characteristics of bulk-heterojunction polymer solar cells based on poly(3-hexylthiophene-2,5-diyl) and [6,6]-phenyl C61 butyric acid methyl ester by adding 1,8-octanedithiol as a processing agent in an active layer. The effects of the additive, 1,8-octanedithiol, on the device performance parameter characteristics have been discussed. The current density-voltage measurements, UV-Vis absorption spectra, X-ray diffraction spectra, and scanning probe microscope images have been used to discuss the performance characteristics of polymer solar cells.
Highlights
Clean and renewable energies have been considerable issues in the last decade
The solution containing a mixture of P3HT:PCBM with processing additives was stirred for 10 min
1,8-octanedithiol, was used, peak intensities were much higher than those of the films without 1,8-octanedithiol, and this implies that the P3HT:PCBM films possess a crystalline nature and that highly ordered structures are formed in the films using a processing additive
Summary
Clean and renewable energies have been considerable issues in the last decade. For this reason, organic photovoltaic cells have been attractive devices as next-generation substitute energy sources [1,2,3,4]. The power conversion efficiencies of organic photovoltaic cells have been steadily improved around 6% through polymer solar cells [5]. Bulk-heterojunction [BHJ] solar cells, based on phaseseparated blends of polymer semiconductors and fullerene derivatives, typically consist of a conjugated polymer, poly(3-hexylthiophene-2,5-diyl) [P3HT] as an electron donor, and fullerene derivatives, [6,6]-phenyl C61 butyric acid methyl ester [PCBM] as an electron acceptor [8,9,10,11,12].
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