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Perfluorophenyl-Incorporated Ferrocene: A Non-Volatile Solid Additive for Boosting Efficiency and Stability in
Chia-Lin Tsai1, Han-Cheng Lu1, Chi-Chun Tseng1
1Department of Applied Chemistry, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu 30010, Taiwan.
ACS Applied Materials & Interfaces
|May 20, 2025
Summary
A new additive, FcF10, enhances organic solar cell performance by optimizing morphology through non-covalent interactions. This leads to higher power conversion efficiency and improved thermal stability in PM6:Y6 devices.
Area of Science:
- Materials Science
- Organic Electronics
- Photovoltaics
Background:
- Organic photovoltaics (OPVs) offer potential for low-cost, flexible solar energy conversion.
- Morphological control of the active layer is crucial for efficient charge generation and transport in OPVs.
- Development of novel additives is key to optimizing OPV performance and stability.
Purpose of the Study:
- To design and synthesize a new non-volatile solid additive, FcF10, for OPV applications.
- To investigate the effect of FcF10 on the morphology and performance of PM6:Y6 based organic solar cells.
- To evaluate the thermal stability of OPV devices incorporating FcF10.
Main Methods:
- Synthesis of FcF10 by integrating pentafluorophenyl groups into ferrocene via ester linkages.
- Incorporation of FcF10 as a solid additive into the PM6:Y6 active layer.
- Characterization of active layer morphology and device performance (PCE, Voc, Jsc, FF) using techniques like X-ray diffraction and current-voltage measurements.
- Assessment of thermal stability through prolonged annealing at elevated temperatures.
Main Results:
- FcF10 additive facilitated morphological optimization in the PM6:Y6 system through π···π, F···π, and F···F interactions.
- PM6:Y6:FcF10 solar cells achieved a power conversion efficiency (PCE) of 17.00%, outperforming pristine devices.
- Devices exhibited enhanced thermal stability, retaining 88% of initial PCE after annealing at 85 °C.
- Improved molecular stacking, crystallinity, and charge transport were observed due to FcF10 incorporation.
Conclusions:
- The FcF10 additive effectively optimizes the donor-acceptor morphology in PM6:Y6 organic solar cells.
- FcF10 leads to significant improvements in power conversion efficiency and thermal stability.
- This study presents FcF10 as a promising additive for developing high-performance and stable organic photovoltaics.
