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Multi-walled carbon nanotube/poly(3-hexylthiophene) (CNT/P3HT) and CNT- graft -poly(3-dodecylthiophene) (PDDT)/P3HT nanohybrids were applied in active layers to study the effects of these nanostructures on the polymer solar cell (PSC) performance. The… Click to show full abstract
Multi-walled carbon nanotube/poly(3-hexylthiophene) (CNT/P3HT) and CNT- graft -poly(3-dodecylthiophene) (PDDT)/P3HT nanohybrids were applied in active layers to study the effects of these nanostructures on the polymer solar cell (PSC) performance. The charge-carrier dynamics and photophysics were studied in the binary and ternary systems based on P3HT, pre-developed nanostructures and/or phenyl-C71-butyric acid methyl ester (PC71BM) through the electrochemical impedance spectroscopy and morphological analyses. The weaker bimolecular recombination in the photoactive layer, consisting of CNT- graft -PDDT/P3HT nanostructures, was confirmed by short-circuit current ( J sc ) and open-circuit voltage ( V oc ) measurements as a function of light intensity. PSC composed of P3HT:PC71BM:CNT-graft-PDDT/P3HT PSC exhibited the highest PCE of 4.18% with significantly increased J sc and V oc .
Journal Title: Carbon Letters
Year Published: 2020
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