Pu, Mingrui; Chen, Hui; Chao, Pengjie; Zhu, Yulin; Zheng, Nan; Lai, Hanjian; Zhao, Tingxing; He, Feng published their research in ACS Applied Polymer Materials in 2021. The article was titled 《Chlorinated Random Terpolymers with Efficient Solar Conversion and Low Batch-to-Batch Variation》.Electric Literature of C4H2Br2S The article contains the following contents:
The strategy of random terpolymn. has been shown to be a flexible and effective method with which to construct state-of-the-art polymer donors, and chlorination has frequently been utilized to fine-tune material properties in these polymers with the aim of improving the solar conversion efficiency. Herein, three random terpolymers consisting of BDT, BDD, and Th-Cl monomers in the optimized ratio of 1:0.85:0.15 were synthesized in parallel in an effort to understand the effect of chlorination in terpolymer systems and the chlorine-containing derviatives (named PBDB-Th15, PBDB-ThCl15, and PBDB-Th2Cl15). Among these three polymers, PBDB-ThCl15 shows a low-lying HOMO level, the most balanced hole and electron mobility, and enhanced aggregation behavior in blend film as a result of the introduction of one chlorine atom. When blended with a small mol. acceptor Y6, the resulting PBDB-ThCl15:Y6-based device showed the highest PCE of 15.63% of the three polymers. The PBDB-Th15- and PBDB-Th2Cl15-based devices present relatively poor conversion efficiencies of 14.91% and 12.62%. Interestingly, the terpolymer PBDB-ThCl15 was repeatedly prepared by random terpolymn. under the same conditions, and a low batch-to-batch variation was observed with a PCE of 1̃5.50%. These results indicate that the synergy of chlorination with random terpolymn. promises to contribute to the preparation of stable and high-performance solar cell polymers. In the experimental materials used by the author, we found 2,5-Dibromothiophene(cas: 3141-27-3Electric Literature of C4H2Br2S)
2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used in the preparation of soluble α,ω-diformyl-a-oligothiophenes.Electric Literature of C4H2Br2S
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary