A1 Refereed original research article in a scientific journal
Polaritons in Non‐Fullerene Acceptors for High Responsivity Angle‐Independent Organic Narrowband Infrared Photodiodes
Authors: Abdelmagid, Ahmed Gaber; Qiao, Zhuoran; Coenegracht, Boudewijn; Yu, Gaon; Qureshi, Hassan A.; Anthopoulos, Thomas D.; Gasparini, Nicola; Daskalakis, Konstantinos S.
Publisher: Wiley
Publishing place: WEINHEIM
Publication year: 2025
Journal: Advanced Optical Materials
Journal name in source: Advanced Optical Materials
Journal acronym: ADV OPT MATER
Article number: e01727
Number of pages: 7
ISSN: 2195-1071
eISSN: 2195-1071
DOI: https://doi.org/10.1002/adom.202501727
Web address : https://doi.org/10.1002/adom.202501727
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/499588279
Narrowband infrared organic photodetectors are in great demand for sensing, imaging, and spectroscopy applications, in particular for handheld and wearable devices, in which miniaturization is essential. However, most existing strategies for narrowband detection depend on spectral filtering either through saturable absorption, which requires active layers exceeding 500 nm, restricting the choice of materials for producing high-quality films, or cavity effects, which inherently introduce strong angular dispersion. Microcavity exciton-polariton (polariton) modes, which emerge from strong exciton-photon coupling, have recently been explored as an angular dispersion suppression strategy for organic optoelectronics. In this work, the first narrowband infrared polariton organic photodiode that combines angle-independent response with a record-high responsivity of 0.24 A W-1 at 965 nm and -2 V is presented. This device, featuring a 100-nm-thin active layer comprising a non-fullerene acceptor, exhibits a detection mode with a full-width at half-maximum of less than 30 nm and a marginal angular dispersion of under 15 nm across +/- 45 degrees. This study highlights the potential of polaritons as an innovative platform for developing next-generation optoelectronic devices that achieve simultaneous enhancements in optical and electronic performance.
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Funding information in the publication:
This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No. [948260]) and by the European Innovation Council through the project SCOLED (Grant Agreement Number 101098813). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Innovation Council and SMEs Executive Agency (EISMEA). Neither the European Union nor the granting authority can be held responsible for them. ZQ and NG thank the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR-2020-CRG8-4095 and ORFS-2023-OFP-5544.
