shota fukuma

Low‐Threshold Red Lasing in Diketopyrrolopyrrole‐Based Organic Semiconductor Films

ABSTRACT Achieving low‐lasing threshold organic semiconductor lasers (OSLs) in the red to deep‐red region remains challenging due to the intrinsic trade‐off between long‐wavelength emission and high optical gain. Extended π‐conjugation required for red‐shifted emission typically...