TY - JOUR AU1 - Tamai, Yasunari AB - IntroductionOrganic solar cells (OSCs) have attracted considerable interest owing to their potential advantages, which include lightweight, thin‐film flexibility, color tunability, low toxicity, and low‐cost manufacturing. The most significant bottleneck limiting the practical applicability of OSCs has been their poor power conversion efficiency (PCE) (Figure 1a), which had lagged far behind those of their inorganic and perovskite counterparts (e.g., PCEs of 26.3% and 26.1% have been reported for silicon and perovskite solar cells).[1] However, the PCE of OSCs has increased spectacularly rapidly in recent years and now approaches 19% for single‐junction cells[2] and 20% for tandem cells (Figure 1b).[3] These recent successes have rekindled interest in this research field, and a large number of research articles are being published. This perspective, therefore, briefly summarizes the state of the art of OSC characteristics to highlight the recent advances made with regard to their performance as well as the challenges that remain in realizing further improvements.1Figurea) Highest certified efficiency of organic solar cells (OSCs) during various periods (until 2020) provided by NREL (https://www.nrel.gov/pv/cell‐efficiency.html, last access: October 2022). b) Efficiencies of the state‐of‐the‐art OSCs that exhibit power conversion efficiency (PCE) of over 18% plotted against the date available online.[2b−o]c–e) Histograms of: c) short‐circuit current density TI - What's Next for Organic Solar Cells? The Frontiers and Challenges JF - Advanced Energy and Sustainability Research DO - 10.1002/aesr.202200149 DA - 2023-01-01 UR - https://www.deepdyve.com/lp/wiley/what-s-next-for-organic-solar-cells-the-frontiers-and-challenges-0iC4s0qpt0 VL - 4 IS - 1 DP - DeepDyve ER -