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An Efficient Narrowband Near-Infrared at 1040 nm Organic Photodetector Realized by Intermolecular Charge Transfer Mediated Coupling Based on a Squaraine Dye
Zitieren Sie bitte immer diese URN: urn:nbn:de:bvb:20-opus-256374
- A highly sensitive short-wave infrared (SWIR, λ > 1000 nm) organic photodiode (OPD) is described based on a well-organized nanocrystalline bulk-heterojunction (BHJ) active layer composed of a dicyanovinyl-functionalized squaraine dye (SQ-H) donor material in combination with PC\(_{61}\)BM. Through thermal annealing, dipolar SQ-H chromophores self-assemble in a nanoscale structure with intermolecular charge transfer mediated coupling, resulting in a redshifted and narrow absorption band at 1040 nm as well as enhanced charge carrier mobility. TheA highly sensitive short-wave infrared (SWIR, λ > 1000 nm) organic photodiode (OPD) is described based on a well-organized nanocrystalline bulk-heterojunction (BHJ) active layer composed of a dicyanovinyl-functionalized squaraine dye (SQ-H) donor material in combination with PC\(_{61}\)BM. Through thermal annealing, dipolar SQ-H chromophores self-assemble in a nanoscale structure with intermolecular charge transfer mediated coupling, resulting in a redshifted and narrow absorption band at 1040 nm as well as enhanced charge carrier mobility. The optimized OPD exhibits an external quantum efficiency (EQE) of 12.3% and a full-width at half-maximum of only 85 nm (815 cm\(^{-1}\)) at 1050 nm under 0 V, which is the first efficient SWIR OPD based on J-type aggregates. Photoplethysmography application for heart-rate monitoring is successfully demonstrated on flexible substrates without applying reverse bias, indicating the potential of OPDs based on short-range coupled dye aggregates for low-power operating wearable applications.…
Autor(en): | Jin Hong Kim, Andreas Liess, Matthias Stolte, Ana-Maria Krause, Vladimir Stepanenko, Chuwei Zhong, David Bialas, Frank Spano, Frank WürthnerORCiDGND |
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URN: | urn:nbn:de:bvb:20-opus-256374 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Chemie und Pharmazie / Institut für Organische Chemie |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Advanced Materials |
Erscheinungsjahr: | 2021 |
Band / Jahrgang: | 33 |
Heft / Ausgabe: | 26 |
Aufsatznummer: | 2100582 |
Originalveröffentlichung / Quelle: | Advanced Materials 2021, 33(26):2100582. DOI: 10.1002/adma.202100582 |
DOI: | https://doi.org/10.1002/adma.202100582 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 54 Chemie / 547 Organische Chemie |
Freie Schlagwort(e): | J-aggregates; crystal engineering; near-infrared sensitivity; organic photodiodes; squaraine dyes |
Datum der Freischaltung: | 17.02.2022 |
Lizenz (Deutsch): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |