High-Performance Filterless Blue Narrowband Organic Photodetectors

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Modern image sensors necessitate three color-selective photodetectors: red, green, and blue (RGB) sensing units. Among those, blue light-specific photodetectors are comparably much less reported. Here, a fully thermal-evaporated organic photodetector (OPD) with narrowband blue detection based on exploring the dual role of the hole-transporting layer is elegantly demonstrated. By incorporating a MoO3-doped underlayer, the narrowband OPD achieves high external quantum efficiency up to 50% at 0 V with thin-film devices. By adopting an intrinsic underlayer in planar junction configuration along with efficient hole and electron blocking layers, an ultralow dark current (2.46 × 10−12 A cm−2 at −0.1 V) is achieved. The device has a calculated specific detectivity (D*) reaching a record-high value of 6.35 × 1014 Jones, outperforming commercial silicon photodetectors, and an ultrahigh linear dynamic range of 205 dB. This work paves the way for high-sensitivity narrowband organic photodetectors in the visible spectral region.


Original languageEnglish
Article number2308719
Number of pages8
JournalAdvanced functional materials
Volume34 (2024)
Issue number2
Publication statusPublished - 27 Sept 2023