Platinum(II)‐Acetylide Conjugated Polymer Containing Aza‐BODIPY Moieties for Panchromatic Photodetectors

Broadband photodetectors have driven the development of optical communication, image sensing, and health monitoring technologies, yet confronting a challenge in acquiring high performance in the whole spectral range. Herein, a novel low‐bandgap platinum(II)‐acetylide conjugated polymer is designed and synthesized by introducing near‐infrared‐absorbing aza‐BODIPY moieties. Benefiting from the good solubility and extended conjugated systems, it can serve as the donor materials for photodetector. By blending with (6,6)‐phenyl‐C61‐butyric acid methyl ester, organic bulk heterojunction photodetectors are successfully constructed, exhibiting a high detectivity over 1011 Jones in a broad band of 330–930 nm. Especially, the photodetector exhibits external quantum efficiency mostly beyond 15% in the NIR region. This work opens a new possibility for high‐performance organic broadband photodetector application. A narrow‐bandgap platinum(II)‐acetylide conjugated polymer is developed for organic photodetectors. The devices not only achieve panchromatic detection, but also exhibit a high D* value in the range from 330 to 930 nm. Meanwhile, the fast‐response speed of 0.85 µs is obtained by introducing the electron transport layer. Hence, this work opens a new possibility for high‐performance organic photodetector.