Distribution of Polymer Additives Enables Efficient Semi-Transparent Layer-By-Layer Architecture of Organic Solar Cells
Ji Youn Kim a, Eun Mi Jang a, Doo Kyung Moon a
a Nano and Information Materials Lab. (NIMs Lab.), Department of Materials Chemistry and Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul, Republic of Korea.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP24)
Tokyo, Japan, 2024 January 21st - 23rd
Organizers: Qing Shen and James Ryan
Poster, Ji Youn Kim, 096
Publication date: 18th October 2023

Organic solar cells (OSCs) had been studied for decades with their wide possibility of application in many ways such as large area, flexibility, transparency, and solution processability. State-of-the-art devices are presented high performance over 18% by modifying active layer with several strategies recently. Note that manipulating the active layer morphology to form ideal crystallinity and molecular orientation is a key factor of enhancement efficiency of OSCs. Very recently, our group has reported a terpolymeric PM6(FPy=0.2) with 20% of 3-fluoropyridine instead of BDD in PM6 building block, which significantly improved its solubility in eco-friendly solvents and demonstrated as great potential for efficient and versatile OSCs.[1]  In addition, unlike the BHJ approach, the LBL-processed blend films can order molecular orientation, crystallinity, and sufficient interdiffusion at the interface. Eventually, the ideal OSCs can fabricated by LBL OSCs.[2],[3],[4],[5] Herein, we demonstrates that the PM6(FPy=0.2) combined with layer-by-layer (LBL) technique and dual additives to precisely adjust the morphology. Also, with the assistance of optical absorbance, we have been obtained the power conversion efficiency of 11.33% and average visible transmittance of 19.28% by fabricating semi-transparent organic solar cells (ST-OSCs). [6],[7]

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