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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Jacoutot, Polina
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Topics
Publications (4/4 displayed)
- 2024A novel selenophene based non-fullerene acceptor for near-infrared organic photodetectors with ultra-low dark currentcitations
- 2023Enhanced sub-1 eV detection in organic photodetectors through tuning polymer energetics and microstructurecitations
- 2022Infrared Organic Photodetectors Employing Ultralow Bandgap Polymer and Non‐Fullerene Acceptors for Biometric Monitoringcitations
- 2021Ternary organic photodetectors based on pseudo-binaries nonfullerene-based acceptorscitations
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article
Enhanced sub-1 eV detection in organic photodetectors through tuning polymer energetics and microstructure
Abstract
One of the key challenges facing organic photodiodes (OPDs) is increasing the detection into the infrared region. Organic semiconductor polymers provide a platform for tuning the bandgap and optoelectronic response to go beyond the traditional 1000-nanometer benchmark. In this work, we present a near-infrared (NIR) polymer with absorption up to 1500 nanometers. The polymer-based OPD delivers a high specific detectivity<jats:italic>D<jats:sup>*</jats:sup></jats:italic>of 1.03 × 10<jats:sup>10</jats:sup>Jones (−2 volts) at 1200 nanometers and a dark current<jats:italic>J</jats:italic><jats:sub>d</jats:sub>of just 2.3 × 10<jats:sup>−6</jats:sup>ampere per square centimeter at −2 volts. We demonstrate a strong improvement of all OPD metrics in the NIR region compared to previously reported NIR OPD due to the enhanced crystallinity and optimized energy alignment, which leads to reduced charge recombination. The high<jats:italic>D<jats:sup>*</jats:sup></jats:italic>value in the 1100-to-1300-nanometer region is particularly promising for biosensing applications. We demonstrate the OPD as a pulse oximeter under NIR illumination, delivering heart rate and blood oxygen saturation readings in real time without signal amplification.