Microsecond triplet emission from organic chromophore-transition metal dichalcogenide hybrids via through-space spin orbit proximity effect

Jinho Choi, Healin Im, Jung-Moo Heo, Do Wan Kim, Hanjie Jiang, Alexander Stark, Wenhao Shao, Paul M. Zimmerman, Gi Wan Jeon, Jae-Won Jang, Euy Heon Hwang, Sunkook Kim (), Dong Hyuk Park () and Jinsang Kim ()
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Healin Im: Sungkyunkwan University
Jung-Moo Heo: University of Michigan
Do Wan Kim: Dongguk University
Hanjie Jiang: University of Michigan
Alexander Stark: University of Michigan
Wenhao Shao: University of Michigan
Paul M. Zimmerman: University of Michigan
Gi Wan Jeon: Korea Atomic Energy of Research Institute
Jae-Won Jang: Dongguk University
Euy Heon Hwang: Sungkyunkwan University
Sunkook Kim: Sungkyunkwan University
Dong Hyuk Park: Inha University
Jinsang Kim: University of Michigan

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Efficient light generation from triplet states of organic molecules has been a hot yet demanding topic in academia and the display industry. Herein, we propose a strategy for developing triplet emitter by creating heterostructures of organic chromophores and transition metal dichalcogenides (TMDs). These heterostructures emit microsecond phosphorescence at room temperature, while their organic chromophores intrinsically exhibit millisecond phosphorescence under vibration dissipation-free conditions. This enhancement in phosphorescence is indicative of significantly enhanced spin-orbit coupling efficiency through coupling with TMDs. Through detailed studies on these hybrids from various perspectives, we elucidate key features of each component essential for generating microsecond triplet emission, including 2H-TMDs with heavy transition metals and aromatic carbonyl with an ortho-hydroxy group. Our intriguing findings open avenues for exploring the universal applicability of fast and stable hybrid triplet emitters.

Date: 2024
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DOI: 10.1038/s41467-024-51501-8

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