Management of Locally Excited States for Purine-based TADF Emitters: A Method to Reduce Device Efficiency Roll-Off

The programmed arylation of purine has been developed to construct a series of efficient thermally activated delayed fluorescent (TADF) materials. The corresponding organic light-emitting diodes (OLEDs) exhibit external quantum efficiency as high as 16.0% alongside small efficiency roll-off. Intrigu...

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Bibliographic Details
Published inOrganic letters Vol. 23; no. 10; pp. 3839 - 3843
Main Authors Wu, Yangbo, Zhang, Yuming, Ran, Chunhao, Lan, Jingbo, Bin, Zhengyang, You, Jingsong
Format Journal Article
LanguageEnglish
Published WASHINGTON Amer Chemical Soc 21.05.2021
Subjects
Chemistry
Chemistry, Organic
Physical Sciences
Science & Technology
LIGHT-EMITTING-DIODES
MOLECULAR DESIGN
PURE BLUE
ACTIVATED DELAYED FLUORESCENCE
ARYLATION
SINGLET
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Summary:The programmed arylation of purine has been developed to construct a series of efficient thermally activated delayed fluorescent (TADF) materials. The corresponding organic light-emitting diodes (OLEDs) exhibit external quantum efficiency as high as 16.0% alongside small efficiency roll-off. Intriguingly, this work proves that the good management of localized states is an efficient way to reduce device efficiency roll-off and is crucial for the future design of high-performance OLEDs.
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ISSN:1523-7060
1523-7052
DOI:10.1021/acs.orglett.1c00918