Ryota Fujioka1, Tatsuya Fukushima1, Natsumi Oishi1, Yasuko Koshiba1, Chikayo Takechi1, Shohei Horike1,3,
Hironori Kaji2, and Kenji Ishida1*

1)Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Japan
2)Institute for Chemical Research, Kyoto University, Japan
3)Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Japan

Reference: Japanese Journal of Applied Physics 59, SGGG04 (2020) 


  • A new near infrared (NIR) absorbing dye, phenyl-fused dibenzo-BODIPY with benzo[1,3,2]oxazaborinine rings (PhBODIPY), for organic photodiode (PDs). 
  • PhBODIPY can be deposited on the substrates without thermal decomposition and its deposited film is amorphous state with high thermal stability. The deposited film showed broadband absorption in the wavelength range of 600‒1000 nm.
  • The NIR-OPD with PhBODIPY neat film demonstrated a detectivity (D*) of 7.41 × 1011 Jones under NIR light irradiation at a wavelength of 820 nm. The D* improved to 1.70 × 1012 Jones by co-deposition of 1:1 (w/w) PhBODIPY:fullerene (C60).

Materials & Devices

*Figure reference: Optics Express Vol. 27, Issue 18, pp. 25410-25419 (2019)

NIR sensor, organic photodiodes, OPD, BODIPY