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- Publisher Website: 10.1002/anie.202013051
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- PMID: 33174374
- WOS: WOS:000602612900001
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Article: Face‐to‐Face Orientation of Quasiplanar Donor and Acceptor Enables Highly Efficient Intramolecular Exciplex Fluorescence
Title | Face‐to‐Face Orientation of Quasiplanar Donor and Acceptor Enables Highly Efficient Intramolecular Exciplex Fluorescence |
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Authors | |
Issue Date | 2021 |
Publisher | Wiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at https://onlinelibrary.wiley.com/journal/15213773 |
Citation | Angewandte Chemie (International Edition), 2021, v. 60 n. 8, p. 3994-3998 How to Cite? |
Abstract | Intramolecular through-space charge-transfer (TSCT) excited states have been exploited for developing thermally activated delayed fluorescence (TADF) emitters, but the tuning of excited state dynamics by conformational engineering remains sparse. Designed here is a series of TSCT emitters with precisely controlled alignment of the donor and acceptor segments. With increasing intramolecular π–π interactions, the radiative decay rate of the lowest singlet excited state (S1) progressively increased together with a suppression of nonradiative decay, leading to significantly enhanced photoluminescence quantum yields of up to 0.99 in doped thin films. A high-efficiency electroluminescence device, with a maximum external quantum efficiency (EQE) of 23.96 %, was achieved and maintains >20 % at a brightness of 1000 cd m−2. This work sheds light on the importance of conformation control for achieving high-efficiency intramolecular exciplex emitters. |
Persistent Identifier | http://hdl.handle.net/10722/302452 |
ISSN | 2021 Impact Factor: 16.823 2020 SCImago Journal Rankings: 5.831 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Wu, C | - |
dc.contributor.author | Liu, W | - |
dc.contributor.author | Li, K | - |
dc.contributor.author | Cheng, G | - |
dc.contributor.author | Xiong, J | - |
dc.contributor.author | Teng, T | - |
dc.contributor.author | Che, CM | - |
dc.contributor.author | Yang, C | - |
dc.date.accessioned | 2021-09-06T03:32:30Z | - |
dc.date.available | 2021-09-06T03:32:30Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Angewandte Chemie (International Edition), 2021, v. 60 n. 8, p. 3994-3998 | - |
dc.identifier.issn | 1433-7851 | - |
dc.identifier.uri | http://hdl.handle.net/10722/302452 | - |
dc.description.abstract | Intramolecular through-space charge-transfer (TSCT) excited states have been exploited for developing thermally activated delayed fluorescence (TADF) emitters, but the tuning of excited state dynamics by conformational engineering remains sparse. Designed here is a series of TSCT emitters with precisely controlled alignment of the donor and acceptor segments. With increasing intramolecular π–π interactions, the radiative decay rate of the lowest singlet excited state (S1) progressively increased together with a suppression of nonradiative decay, leading to significantly enhanced photoluminescence quantum yields of up to 0.99 in doped thin films. A high-efficiency electroluminescence device, with a maximum external quantum efficiency (EQE) of 23.96 %, was achieved and maintains >20 % at a brightness of 1000 cd m−2. This work sheds light on the importance of conformation control for achieving high-efficiency intramolecular exciplex emitters. | - |
dc.language | eng | - |
dc.publisher | Wiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at https://onlinelibrary.wiley.com/journal/15213773 | - |
dc.relation.ispartof | Angewandte Chemie (International Edition) | - |
dc.rights | This is the peer reviewed version of the following article: Angewandte Chemie (International Edition), 2021, v. 60 n. 8, p. 3994-3998, which has been published in final form at https://doi.org/10.1002/anie.202013051. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. | - |
dc.title | Face‐to‐Face Orientation of Quasiplanar Donor and Acceptor Enables Highly Efficient Intramolecular Exciplex Fluorescence | - |
dc.type | Article | - |
dc.identifier.email | Cheng, G: ggcheng@hku.hk | - |
dc.identifier.email | Che, CM: chemhead@hku.hk | - |
dc.identifier.authority | Cheng, G=rp02145 | - |
dc.identifier.authority | Che, CM=rp00670 | - |
dc.description.nature | postprint | - |
dc.identifier.doi | 10.1002/anie.202013051 | - |
dc.identifier.pmid | 33174374 | - |
dc.identifier.scopus | eid_2-s2.0-85097866450 | - |
dc.identifier.hkuros | 324868 | - |
dc.identifier.volume | 60 | - |
dc.identifier.issue | 8 | - |
dc.identifier.spage | 3994 | - |
dc.identifier.epage | 3998 | - |
dc.identifier.isi | WOS:000602612900001 | - |
dc.publisher.place | Germany | - |