期刊
POLYMERS
卷 13, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/polym13010115
关键词
charge; exciton; aggregation; polymer solar cells; morphology
资金
- NSF [1827731, 1900998, 1900837, 1639429]
- Direct For Education and Human Resources
- Division Of Human Resource Development [1900998] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1827731] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1639429] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1900837] Funding Source: National Science Foundation
Research shows that tuning aggregation in polymer blends can optimize charge generation, which is beneficial for the design of highly efficient organic photovoltaic devices.
Optimization of charge generation in polymer blends is crucial for the fabrication of highly efficient polymer solar cells. While the impacts of the polymer chemical structure, energy alignment, and interface on charge generation have been well studied, not much is known about the impact of polymer aggregation on charge generation. Here, we studied the impact of aggregation on charge generation using transient absorption spectroscopy, neutron scattering, and atomic force microscopy. Our measurements indicate that the 1,8-diiodooctane additive can change the aggregation behavior of poly(benzodithiophene-alt-dithienyl difluorobenzotriazole (PBnDT-FTAZ) and phenyl-C61-butyric acid methyl ester (PCBM)polymer blends and impact the charge generation process. Our observations show that the charge generation can be optimized by tuning the aggregation in polymer blends, which can be beneficial for the design of highly efficient fullerene-based organic photovoltaic devices.
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