Minimizing the Trade‐off Between Voltage and Current in Organic Solar Cells via an Anthracene‐Based Non‐Fullerene Equalizer

ABSTRACT Organic solar cells are among the most advanced thin‐film photovoltaic technologies due to their lightweight, thin, and flexible characteristics. However, an inherent trade‐off between open‐circuit voltage ( V OC ) and short‐circuit current density ( J SC ) exists, fundamentally stemming from the balance between charge generation and recombination. To address this challenge, we developed a two‐dimensional extension molecule based on the A‐D‐A′‐D‐A non‐fullerene acceptor (NFA) framework by replacing the central core with anthracene and introducing halogen‐free end groups, yielding a novel molecule named QxAt. This molecule combines high crystallinity with a complementary absorption spectrum to commonly used NFAs. When incorporated as a voltage‐current balancer into the PM6:BTP‐eC9 system, the active layer morphology was largely preserved, while molecular packing was modestly optimized, contributing to more efficient exciton dissociation and charge collection, improved hole and electron mobilities, and effective suppression of charge recombination, ultimately enabling a moderate improvement in J SC . More importantly, QxAt significantly increased the electroluminescence quantum efficiency, effectively suppressing non‐radiative recombination and reducing energy loss, which in turn elevated V OC . Consequently, the PCE was markedly improved from 18.9% to 20.1%, achieving a synergistic optimization of both V OC and J SC . This work provides a molecular design strategy to mitigate the voltage‐current trade‐off for high‐efficiency organic photovoltaics.