By a News Reporter-Staff News Editor at Energy Weekly News -- New research on Fullerenes is the subject of a report. According to news originating from Singapore, Singapore, by VerticalNews correspondents, research stated, "Inkjet printing is a mask-less non-contact deposition technique that is potentially suited for prototyping and manufacturing of thin-film polymer organic semiconductor devices from digital images. However new strategies are needed to achieve films with good macromorphology (i.e., high-fidelity footprint and uniform cross-section) and nanomorphology on unstructured substrates using a conventional ink-jet."
Our news journalists obtained a quote from the research from Singapore National University, "Here we report a new transition solvent strategy to provide the desired film macromorphology and ultrafine nanomorphology in regioregular poly(3-hexylthiophene): phenyl-C-61-butyric acid methyl ester (P3HT: PCBM) model films, without using chlorinated solvents. This strategy employs a good volatile solvent in combination with a miscible poor solvent that is much less volatile, which is the reverse of the usual low - high boiling-point solvent method. The good solvent suppresses premature aggregation in the ink head. Its removal by evaporation on the substrate leaves the poor solvent that triggers earlyp-stacking ordering and/or gelation of the polymer matrix that immobilizes the printed fluid on the substrate, suppressing both contact-line depinning and evaporation-induced solvent flow effects. The resultant donor-acceptor nanomorphology is further improved by vacuum drying at an optimal rate that avoids bubble formation. We have systematically characterized P3HT: PCBM films deposited with different solvents and platen temperatures to identify key macro-and nano-morphology determining processes. High-performance printed P3HT: PCBM solar cells were realized."
According to the news editors, the research concluded: "These findings are applicable also to other printing and coating techniques based on low-viscosity inks."
For more information on this research see: A transition solvent strategy to print polymer: fullerene films using halogen-free solvents for solar cell applications. Organic Electronics, 2014;15(2):449-460. Organic Electronics can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Organic Electronics - www.elsevier.com/wps/product/cws_home/620806)
The news correspondents report that additional information may be obtained from G.H. Lim, Singapore National University, Solar Energy Res Inst Singapore, Singapore 117574, Singapore. Additional authors for this research include J.M. Zhuo, L.Y. Wong, S.J. Chua, L.L. Chua and P.K.H. Ho.
Keywords for this news article include: Asia, Carbon, Energy, Fullerenes, Solar Cell, Nanotechnology, Emerging Technologies
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