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Refined Shockley–Queisser Framework–Guided Acceptor Design Enables Loss-Aware Bandgap Targeting in Organic Solar Cells
One-line summary
A solar energy research paper on Refined Shockley–Queisser Framework–Guided Acceptor Design Enables Loss-Aware Bandgap Targeting in Organic Solar Cells.
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Chinese explanation / 中文解读
中文解读待补充：本站会优先为光伏效率、钙钛矿太阳能电池、储能技术、太阳能热利用、BIPV、并网技术等高价值论文补充中文说明。
Original abstract
High Resolution Image Download MS PowerPoint Slide Precise bandgap tuning is critical for maximizing the power conversion efficiencies (PCEs) of organic solar cells (OSCs). Here, we refined the Shockley–Queisser model by incorporating sub-bandgap absorption and nonradiative losses, predicting an optimal optical bandgap ( E g ) of ∼1.41 eV for Y-series acceptor-based OSCs, higher than the ideal SQ value of 1.34 eV. Guided by this loss-aware target, we designed and synthesized a new acceptor (YCF3-BO) with CF 3 -terminated core- and branched outer-side chains to achieve the target E g in PM6:YCF3-BO devices. The resulting binary and ternary devices achieved PCEs of 19.8% and 20.2%, respectively. This performance arises from two synergistic effects: tuning E g into the refined optimum window enhances photoluminescence quantum yield and suppresses nonradiative recombination, while branched side chains promote a 3D charge-transport network. Furthermore, PM6:YCF3-BO-based photocathodes operated efficiently in underwater solar hydrogen production. This study establishes a unified framework integrating loss-aware bandgap theory with acceptor design and solid-state packing control for advancing organic photovoltaics.
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