Star‐Shaped Oligomer Acceptors via Core Engineering for Ternary Organic Solar Cells With 20.8% Certified Efficiency
Oligomerized non‐fullerene acceptors (o‐NFAs) have emerged as a promising material for constructing efficient and stable organic solar cells (OSCs). However, the precise role of their molecular geometry and surface properties in governing the vertical phase distribution for efficient charge collection near electrodes...