The energy gap law for triplet states in Pt-containing conjugated polymers and monomers
Abstract
The energy gap law established for aromatic hydrocarbons and rare earth ions relates the nonradiative decay rate to the energy gap of a transition through a multiphonon emission process. We show that this energy gap law can be applied to the phosphoresce of a series of conjugated polymers and monomers for which the radiative decay rate has been enhanced through incorporation of a heavy metal. We find that the nonradiative decay rate from the triplet state T(1) increases exponentially with decreasing T(1)-S(0) gap for the polymers and monomers at 300 and 20 K. Comparison of the nonradiative decay of polymers with that of their corresponding monomers highlights the role of electron-lattice coupling.
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The difficulty in constructing NIR emission lies in the rapid internal conversion between low-energy-level S1 and S0, explored in light of the energy-gap law.
“The difficulty in constructing NIR emission lays in the rapid internal conversion between low-energy-level S1 and S0, which was explored in light of energy-gap law.”
From Red-light excited efficient metal-free near-infrared room-temperature phosphorescent films (2022) · cites this paper as [34]
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Room-temperature phosphorescence from organic aggregates
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- Authors
- Wilson, J. S., Chawdhury, N., Al-Mandhary, M. R. A., Younus, M., Khan, M. S., Raithby, P. R., Köhler, A., & Friend, R. H.
- Affiliations
- University of Cambridge (GB)
- ORCID
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2001-08-24
- Volume
- 123
- Issue
- 38
- Pages
- 9412-9417
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W1987620130
- Cited by
- 553
- References
- 34
- Citations by year
- 2026: 26 · 2025: 30 · 2024: 38 · 2023: 28 · 2022: 23 · 2021: 29 · 2020: 24 · 2019: 30 · 2018: 32 · 2017: 27 · 2016: 32 · 2015: 24 · 2014: 30 · 2013: 13 · 2012: 13
- FWCI
- 18.33
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of the American Chemical Society (publishedVersion)
- PubMed (publishedVersion)
- publish.UP (University of Potsdam) (submittedVersion)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
- Physical Sciences › Materials Science › Materials Chemistry › Luminescence and Fluorescent Materials
- Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
- Keywords
- energy gap law, triplet state, phosphorescence, conjugated polymers, conjugated monomers, heavy metal doping, nonradiative decay, multiphonon emission, electron-lattice coupling, radiative decay rate
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