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Cutting-edge organic narrowband photodetectors sensitive to far-red photons

A research team led by Prof. Pecunia has demonstrated organic photodetectors that selectively sense far-red photons with cutting-edge performance. 

Organic semiconductors offer a highly appealing platform for the detection of light within a narrow wavelength range (narrowband photodetection), as needed for innumerable application areas (e.g., colourimetry, smart-sensor systems, lab-on-chip devices, the Internet of Things). Specifically, the attractiveness of organic narrowband photodetectors is due to the unique tunability of the optoelectronic properties of organic semiconductors as well as to their solution-based processibility, which opens up considerable application space beyond the reach of conventional optoelectronics.

Prof. Pecunia’s team has overcome the outstanding challenge of selectively detecting far-red light (wavelength in the region of 700–750 nm) with narrowband-absorption-type organic photodetectors. Key to this breakthrough was the use of a novel non-fullerene acceptor, as well as the compositional manipulation of the photoactive layer. These results illustrate the potential of the fullerene-free approach to narrowband organic photodetectors. Additionally, they providing new opportunities for the applications requiring far-red-selective light detection, such as analytical biology, medical diagnostics, remote sensing, and multispectral imaging.

This work has been published in the journal Advanced Optical Materials.

Reference
K. Xia*, Y. Li, Y. Wang, L. Portilla, V. Pecunia†*, “Narrowband-Absorption-Type Organic Photodetectors for the Far-Red Range Based on Fullerene-Free Bulk Heterojunctions”, Advanced Optical Materials, 1902056, 2020. DOI: 10.1002/adom.201902056


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