Organic Solar Cells with Boron- or Nitrogen-Doped Carbon Nanotubes in the P3HT : PCBM Photoactive Layer

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Date
2015-12-02Author
Keru, Godfrey K.
Ndungu, P. G.
Mola, G. T.
Nogueira, A. F.
Nyamori, V. O.
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Either boron- or nitrogen-doped carbon nanotubes (B- or N-CNTs) were incorporated in bulk heterojunction organic solar cells photoactive layer composed of poly(3 hexylthiophene) (P3HT) : (6,6)-phenyl-C61-butyric acid methyl ester (PCBM). The physical and chemical properties were investigated using different spectroscopic techniques. The cell performance was followed from their current-voltage (𝐽-𝑉) characteristics. Recombination dynamics of the photo-generated free charge carriers were investigated using micro- to milliseconds transient absorption spectroscopy (TAS). Transmission electron microscopy (TEM) images revealed the presence of cone structures and bamboo compartments in B-CNTs and N-CNTs, respectively. X-ray photoelectron spectroscopy (XPS) revealed very little boron was substituted in the carbon network and presence of pyrrolic, pyridinic, and quaternary species of nitrogen in N-CNTs. 𝐽-𝑉 characteristics were found to be similar for the devices with B- and N-CNTs even though boron- and nitrogen-doped CNTs are known to have different properties, that is, p-type and n-type, respectively. TAS results showed that all devices had long lived free charge carriers but the devices with B- or N-CNTs had low power conservation efficiency and voltage.
URI
https://www.hindawi.com/journals/jnm/2016/5923402/https://www.researchgate.net/publication/289367367_Organic_Solar_Cells_with_Boron-_or_Nitrogen-Doped_Carbon_Nanotubes_in_the_P3HT_PCBM_Photoactive_Layer
https://dl.acm.org/doi/abs/10.1155/2016/5923402
https://www.semanticscholar.org/paper/Organic-solar-cells-with-boron-or-nitrogen-doped-in-Keru-Ndungu/cdee5041af63d3bdaf3cb442ed67d1627a28b231
https://core.ac.uk/reader/296760600
http://hdl.handle.net/123456789/4537
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