Journal Article10.1007/S10854-018-8974-7
Efficient P3HT:SWCNTs hybrids as hole transport layer in P3HT:PCBM organic solar cells
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TL;DR: In this paper, the effects of non-treated and acid treated single wall carbon nanotubes (SWCNTs) were investigated as hybrids with P3HT and PCBM blend using UV-Vis absorption spectra, XRD, AFM, SEM, electrical conductivity as well as photovoltaic characteristics under illumination.
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Abstract: The effects of non-treated and acid treated single wall carbon nanotubes (SWCNTs) were investigated as hybrids with P3HT and P3HT:PCBM blend using UV–Vis absorption spectra, XRD, AFM, SEM, electrical conductivity as well as photovoltaic characteristics under illumination. The absorption spectra have revealed typical absorption peaks around 520 nm which were attributed to the π–π* transition of P3HT. XRD patterns, SEM and AFM images have shown a change in the hybrids’ structure; the crystallinity peaks were noticeably affected by the addition of SWCNTs, while the morphological investigations have revealed clear features at the organic surface films after treated with SWCNTs. The photovoltaic performance have revealed an increase in the power conversion efficiency (PCE) from 1.52% in the reference P3HT:PCBM-based device to 2.52% in the P3HT:PCBM device with P3HT:SWCNTs as hole transport layer. This enhancement has been ascribed to the increase in the short circuit current density which is associated to an increase in the electrical conductivity. The results have confirmed the ability of SWCNTS to transport holes as it is for electrons; the conjugated polymer twisted around the nanotubes and blocks the way from the electrons and transfer hole.
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Recent Advances in Hole-Transporting Layers for Organic Solar Cells
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Julia Reinspach,Julia Reinspach,Ying Diao,Ying Diao,Gaurav Giri,Torsten Sachse,Kemar England,Yan Zhou,Christopher J. Tassone,Brian J. Worfolk,Brian J. Worfolk,Martin Presselt,Michael F. Toney,Stefan C. B. Mannsfeld,Zhenan Bao +14 more
TL;DR: One important finding of this study is that, in contrast to spin-coated films, the P3HT molecular orientation can be controlled by the substrate chemistry, with PEDOT PSS substrates yielding face-on orientation at the substrate-film interface, an orientation highly favorable for organic solar cells.
Unexpected Hole Transfer Leads to High Efficiency Single-Walled Carbon Nanotube Hybrid Photovoltaic
TL;DR: These key findings will not only enhance the knowledge of photocurrent generation at nanoscale interfaces, but also make selective omission of m-SWNT redundant, promising carbon nanomaterial-based, low-cost, high-efficiency hybrid photovoltaics.
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Fei Lan,Guangyong Li +1 more
TL;DR: The finding of hole transporting behavior of SWNT in P3HT/SWNT blend will provide a useful guidance for enhancing the performance of polymer solar cells by carbon nanotubes.
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Wei Wang,K. A. Shiral Fernando,Yi Lin,Mohammed J. Meziani,L. Monica Veca,Li Cao,Puyu Zhang,Martin M. Kimani,Ya-Ping Sun +8 more
TL;DR: It is reported that bulk-separated metallic single-walled carbon nanotubes offer superior performance in conductive composites with poly(3-hexylthiophene) and also in transparent conductive coatings based on PEDOT:PSS.