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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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| Petrov, R. H. | Madrid |
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| Bih, L. |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Ali, M. A. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Rignanese, Gian-Marco |
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Scaccabarozzi, Alberto Davide
Politecnico di Milano
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2023Enhanced sub-1 eV detection in organic photodetectors through tuning polymer energetics and microstructurecitations
- 2020High-density polyethylene—an inert additive with stabilizing effects on organic field-effect transistorscitations
- 2015Polytellurophenes provide imaging contrast towards unravelling the structure–property–function relationships in semiconductor:insulator polymer blendscitations
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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.