Sensitive Organic Photodetectors With Spectral Response up to 1.3 µm Using a Quinoidal Molecular Semiconductor

Abstract Detecting short‐wavelength infrared (SWIR) light has underpinned several emerging technologies. However, the development of highly sensitive organic photodetectors (OPDs) operating in the SWIR region is hindered by their poor external quantum efficiencies (EQEs) and high dark currents. Herein, the development of high‐sensitivity SWIR‐OPDs with an efficient photoelectric response extending up to 1.3 µm is reported. These OPDs utilize a new ultralow‐bandgap molecular semiconductor featuring a quinoidal tricyclic electron‐deficient central unit and multiple non‐covalent conformation locks. The SWIR‐OPD achieves an unprecedented EQE of 26% under zero bias and an even more impressive EQE of up to 41% under…

• NN
  National Natural Science Foundation of China

  Awards: 22275058, U20A6002
• GP
  Guangdong Province Introduction of Innovative R&D Team

  Award: 2019ZT08L075
• SA
  Science and Technology Planning Project of Guangdong Province

  Award: 2023A0505010003
• BA
  Basic and Applied Basic Research Foundation of Guangdong Province

  Award: 2022B1515120008