| The introduction of fullerene derivatives into solution-based polymer solar cells has the potential to achieve a dramatic increase in the energy conversion efficiencies. In this study, Sang-Jin Moon and colleagues in South Korea introduced alkyl groups with various lengths to the terminal ester of C70-PCBX ([6,6]-phenyl C71-butyric acid alkyl ester). They investigated the physico-chemical and photovoltaic properties of the blend using the P3HT (poly-3-hexylthiophene) polymer as a donor. They found that extended alkyl chains of C70-derivatives increased the phase segregation and the interface roughness in bulk heterojunction polymer solar cells to obtain optimum power conversion efficiency at C70-PCBR7. |  |
Effect of the alkyl chain length of C70-PCBX acceptors on the device performance of P3HT:C70-PCBX polymer solar cells
Won Suk Shin, Jong-Cheol Lee, Jae-Ryoung Kim, Hye Young Lee, Sang Kyu Lee, Sung Cheol Yoon and Sang-Jin Moon
J. Mater. Chem., 2011, Advance Article
DOI: 10.1039/C0JM02459G, Paper
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For the development of efficient air detoxification technologies, the design of highly microporous framework materials with hydrophobic inner surface is crucial. Metal–organic frameworks have inspired chemists but are mostly polar, whereas metal-free organic framework materials profit from a high degree of hydrothermal stability. Stefan Kaskel and co-workers from Germany have used cyclotrimerization of bifunctional acetyl compounds to obtain hydrophobic, porous organic frameworks as powders or monoliths with high specific surface areas. The outstanding properties in combination with the opportunity to generate shapes of any kind render the materials highly promising for application in air filtration systems and individual protection, as well as gas storage and separation. |
A new route to porous monolithic organic frameworks via cyclotrimerization
Marcus Rose, Nicole Klein, Irena Senkovska, Christian Schrage, Philipp Wollmann, Winfried Böhlmann, Bertram Böhringer, Sven Fichtner and Stefan Kaskel
J. Mater. Chem., 2011, Advance Article
DOI: 10.1039/C0JM02998J, Paper
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