Details

Autor(en) / Beteiligte

• Sun, Yuting
• Liu, Ziyan
• Li, Yuanlin
• Xiang, Tianfu
• Li, Aijun
• He, Yuhong
• Wei, Haotong
• Sasaki, Shin-ichi
• Tamiaki, Hitoshi
• Wang, Xiao-Feng

Titel

Bilayer chlorophyll-based bio-photodetector based on Z-type charge transfer process

Ist Teil von

• Journal of materials chemistry. C, Materials for optical and electronic devices, 2023-06, Vol.11 (25), p.8438-8445

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We have successfully prepared a bio-photodetector based on chlorophyll derivatives as all photosensitive materials. Zinc methyl 3-devinyl-3-hydroxymethyl-pyropheophorbide- a (Chl-A) and methyl 13 1 -deoxo-13 1 -dicyanomethylene-pyropheophorbide- a (Chl-D) were used as electron acceptor and donor, respectively, where the two formed a heterojunction. Although the energy alignment of the photoactive layers of the device studied here is different from that of traditional photodetectors, the device can work well in a self-driven mode. The device has an optimized configuration, i.e. , indium tin oxide (ITO)/ZnO/Chl-A/Chl-D/MoO 3 /Ag, and exhibited excellent performance at self-biasing. When ZnO was applied as the electron transport layer in the ITO/ZnO/Chl-A/Chl-D/MoO 3 /Ag bio-photodetector device, the dark current density reduced significantly. Besides, the responsivity of the device reached 92.66 mA W −1 , which is an increase by ~34 times compared to the ITO/Chl-A/Chl-D/MoO 3 /Ag device, and the specific detectivity reached 2.48 × 10 11 Jones. Inspired by the Z-scheme of oxygenic photosynthesis, we have successfully prepared a bio-photodetector device based on chlorophyll derivatives as all photosensitive materials.