A 'surfaces-as-ligands' strategy is used to assemble heteroleptic copper(I) dyes [Cu(L anchor 4,4 0 -diyl)bis(4,1-phenylene))bis(phosphonic acid) (2). Asymmetric ancillary ligands with a 2,2 0 -bipyridine metal-binding domain are used to counter the sterically-demanding 6,6 0 -diphenyl-substitution pattern in in the order 3 $ 5 > 6 > 4 on the day of DSC assembly, and 5 > 3 $ 6 > 4 after a week. The best performing DSCs achieve efficiencies of $37% relative to N719 set at 100%.
Wires were fabricated from the high-Tc superconductor Bi0.7Pb0.3SrCaCu1.8Ox (Pb-BSCCO) by an extrusion process. The specimens were sintered for periods up to 14 days, and density was found to decrease with longer sintering times. Rf surface resistance data revealed that the onset of superconductivity occurred at 105 K and that the transition was very broad.
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