Abstract
Organic solar cells (OSCs) are attracting much attention due to their distinct benefits of low cost, lightweight and mechanical flexibility. Low-cost and high-throughput approaches combined with large-scale and roll-to-roll (R2R) processes for producing efficient OSCs in ambient condition will considerably speed up the potential commercialization of OSCs. Herein, the low-boiling additive 1,4-difluorobenzene (1,4-DFB) is proposed to produce high-quality PM6:Y6:PC61BM blend active layer dissolved in low-boiling solvent via the doctor blading process in ambient condition. The additive 1,4-DFB can improve the morphology, π-π stacking and phase separation, decrease the charge recombination and produce the red-shift absorption, leading to the enhanced carrier mobility and more balanced charge transport. Thus, it boosts the performance parameters with obviously enhanced short-circuit current and fill factor, and a power conversion efficiency of 15.34% is achieved. Meanwhile, the OSCs with the 1,4-DFB additive treatment also exhibit much better stability. The results demonstrate that low-boiling additive engineering with 1,4-DFB is a powerful route to improve the performance of OSCs prepared by doctor-blading in ambient condition.
Original language | English |
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Article number | 106794 |
Journal | Organic Electronics |
Volume | 118 |
DOIs | |
Publication status | Published - Jul 2023 |
Keywords
- Ambient condition
- Doctor-blading
- Low-boiling additive
- Organic solar cells
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Biomaterials
- General Chemistry
- Condensed Matter Physics
- Materials Chemistry
- Electrical and Electronic Engineering