Bijleveld, Johan C. published the artcileControlling morphology and photovoltaic properties by chemical structure in copolymers of cyclopentadithiophene and thiophene segments, Category: alcohols-buliding-blocks, the publication is Solar Energy Materials & Solar Cells (2010), 94(12), 2218-2222, database is CAplus.
A series of polythiophenes (PTn) based on dialkyl-cyclopentadithiophene (CPDT) units alternating with short un-substituted thiophene segments of length n (n being the number of thiophenes) along the chain has been synthesized to control the morphol. of PTn:PCBM blends for solar cell applications via the chem. structure of the polymer rather than via (post) processing conditions. The degree of phase separation in PTn:PCBM blends can be controlled via n, because with increase in n the number of solubilizing side chains per thiophene is reduced. For the most soluble derivative, PT0, we find that PCBM crystallizes first, while for the least soluble version, PT3, polymer aggregation prevails. The most intimately mixed morphol. and best solar cells were obtained for PT2, which exhibits a power conversion efficiency (PCE) of about 1.5% under AM1.5G conditions when mixed with PCBM. Although the final PCE is moderate, the study represents an example of a rational approach towards morphol. control via chem. structure, rather than via processing.
Solar Energy Materials & Solar Cells published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, Category: alcohols-buliding-blocks.
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