News Column

New Findings in Fullerenes Described from University of Akron

June 4, 2014

By a News Reporter-Staff News Editor at Electronics Newsweekly -- New research on Fullerenes is the subject of a report. According to news originating from Akron, Ohio, by VerticalNews correspondents, research stated, "Synthesis of novel fullerene derived electron acceptors and characterization of their organic photovoltaic (OPV) properties is important for advancing fundamental knowledge towards developing next generation organic solar cells. We report the synthesis of a novel fulleropyrrolidine derivative C60-fused N-(3-methoxypropyl)-2-(carboxyethyl)-5-(4-cyanophenyl)fulleropyrrolidine (NCPF) by 1,3-dipolar cycloaddition reaction and characterization of NCPF by H-1 NMR, C-13 NMR, MALDI-TOFMS, FT-IR, UV-Vis and CV."

Our news journalists obtained a quote from the research from the University of Akron, "The synthesized NCPF fullerene derivative showed good solubility in common organic solvents such as chlorobenzene and 1,2 dichlorobenzene important for film formation, with optical absorbance and electronic properties comparable to PCBM. Optical micrographs of P3HT:PCBM thin films reveal formation of sparse, phase segregated needle shape PCBM micro-crystalline aggregates after 1 h of annealing at 150 degrees C whose length follows nucleation and growth kinetics over 24 h. In contrast, the P3HT:NCPF thin films exhibit homogeneity over 24 h, possibly due to weaker interparticle vanderWaals forces and/or stronger interactions with P3HT. This long term morphological stability of P3HT:NCPF is important for extended use in OPV applications. At an order of magnitude smaller scale, AFM of as cast and 10 min annealed at 150 degrees C P3HT:PCBM and P3HT:NCPF films reveal mostly smooth surfaces, with some NCPF cluster formation. Grazing incidence wide angle X-ray scattering (GIWAXS) measurements of P3HT:NCPF films indicate an increase of P3HT crystallinity with thermal annealing, leading to improvement in device performance."

According to the news editors, the research concluded: "Photovoltaic devices fabricated with the active layer of P3HT:NCPF and P3HT:PCBM sandwiched between ITO/PEDOT:PSS and Al layer showed comparable performance upon short term annealing."

For more information on this research see: Synthesis and characterization of novel fulleropyrrolidine in P3HT blended bulk heterojunction solar cells. Polymer, 2014;55(7):1769-1781. Polymer can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier -; Polymer -

The news correspondents report that additional information may be obtained from P. Pitliya, Univ Akron, Dept. of Polymer Engn, Akron, OH 44325, United States. Additional authors for this research include Y. Sun, J.C. Garza, C. Liu, X. Gong, A. Karim and D. Raghavan.

Keywords for this news article include: Ohio, Akron, Fullerenes, Electronics, Photovoltaic, United States, Nanotechnology, Emerging Technologies, North and Central America

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Source: Electronics Newsweekly

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