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Antenna Doping: The Key for Achieving Efficient Optical Wavelength Conversion in Crystalline Chromophoric Heterolayers

Haldar, Ritesh; Chen, Hongye; Mazel, Antoine; Chen, Dong‐Hui; Gupta, Gaurav; Dua, Navneet; Diring, Stéphane; Odobel, Fabrice; Wöll, Christof

High‐yield wavelength conversion is one of the key requirements for efficient photon energy harvesting. Attempts to realize efficient conversion by simply stacking layers of chromophores have failed so far, even when using highly crystalline assemblies and employing the recently discovered long‐range (>100 nm) Förster resonance energy transfer (LR‐FRET). Optical conversion efficiency is drastically improved using chromophoric metal–organic framework heterolayers fabricated layer‐by‐layer in connection with an “antenna doping” strategy. Systematic investigations reveal that the LR‐FRET mechanism, reported previously in chromophoric aggregates, is highly anisotropic for neat materials but can be made more isotropic by employing doping strategies. Using optimized fabrication parameters and dopant concentrations, a three‐layer, two‐step cascade with an overall optical conversion efficiency of ≈75% is realized.

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Verlagsausgabe §
DOI: 10.5445/IR/1000130932
Veröffentlicht am 25.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Funktionelle Grenzflächen (IFG)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2196-7350
KITopen-ID: 1000130932
Erschienen in Advanced Materials Interfaces
Verlag Wiley
Schlagwörter crystalline chromophoric heterolayers; energy transfer; heterostructures; metal–organic frameworks
Nachgewiesen in Scopus
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