Organic ultraviolet photodetectors based on subphthalocyanine derivatives

In this article, four subphthalocyanine (SubPc) derivatives were synthesized and characterized. These materials exhibit strong ultraviolet (UV) absorption and excellent donor properties, as confirmed by photophysical and electrochemical characterization. Solution-processed UV photodetectors incorporating SubPc 3a (shown in Scheme 1) as the active layer demonstrate outstanding performance, achieving an external quantum efficiency (EQE) of 38.76 % and a specific detectivity (D*) of 2.18×1012 Jones. This work provides valuable insights into structure-property relationships of SubPc derivatives and advances their application in UV detection technologies.