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Randomly Distributed Conjugated Polymer Repeat Units for High-Efficiency Photovoltaic Materials With Enhanced Solubility and Processability

Randomly Distributed Conjugated Polymer Repeat Units for High-Efficiency Photovoltaic Materials With Enhanced Solubility and Processability

Bing Xu, Ian Pelse, Shruti Agarkar, Shunichiro Ito, Junxiang Zhang, Xueping Yi, Yoshiki Chujo, Seth Marder, Franky So, John R Reynolds

ACS Appl Mater Interfaces. 2018 Dec 26;10(51):44583-44588.

PMID: 30543279

Abstract:

Three structurally disordered terpolymer derivatives of PffBT4T-2OD (PCE11), prepared by replacing a varied amount of bithiophene linkers with single thiophenes, were found to exhibit reduced aggregation in solution with increasing thiophene content, while important redox and optoelectronic properties remained similar to those of PffBT4T-2OD. Solar cells based on random terpolymer-PC71BM blends exhibited average power conversion efficiencies of over 9.5% when processed with preheated substrates, with fill factors above 70%, exceeding those from PffBT4T-2OD. Thanks to increased solubility, random terpolymer devices were able to be fabricated on room-temperature substrates, reaching virtually identical performance among all three polymers despite remarkable thicknesses of ∼400 nm. Thus, we show that the random terpolymer approach is successful in improving processability while maintaining device performance.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP1644164624	PffBT4T-2OD		1644164-62-4	Price

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