期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 51, 页码 44583-44588出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b15522
关键词
conjugated polymers; organic photovoltaics; random terpolymers; bulk heterojunction solar cells; organic electronics
资金
- Department of the Navy, Office of Naval Research Multidisciplinary University Research Initiative [N00014-16-1-2520, N00014-17-1-2243, N00014-17-1-2242]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
- Department of Defense (DoD) through the National Defense Science & Engineering Graduate Fellowship (NDSEG) Program
- NSF under the CCI Center for Selective C-H Functionalization [CHE-1700982]
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 similar to 400 nm. Thus, we show that the random terpolymer approach is successful in improving processability while maintaining device performance.
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