Hybridized local and charge transfer dendrimers with near-unity exciton utilization for enabling high-efficiency solution-processed hyperfluorescent OLEDs

Yin, Yixiao; Zeng, Songkun; Xiao, Chen; Fan, Peng; Shin, Dong Jin; Kim, Ki Ju; Nam, Hyewon; Ma, Qian; Ma, Huili; Zhu, Weiguo; Kim, Taekyung; Lee, Jun Yeob; Wang, Yafei

doi:10.1039/d3mh01860a

Mater. Horiz.

2024

DOI: 10.1039/d3mh01860a

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Hybridized local and charge transfer dendrimers with near-unity exciton utilization for enabling high-efficiency solution-processed hyperfluorescent OLEDs

Yixiao Yin,

Songkun Zeng,

Chen Xiao

et al.

Abstract: Realizing both high emission efficiency and exciton utilization efficiency (ηS) is still a formidable task for hot exciton materials. In this contribution, a prove-to-concept of improving the ηS in hot...

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Cited by 4 publications

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Thermally activated delayed fluorescence dendrimers with strategic dendrons to construct highly efficient solution-processed OLEDs

Wu,

Wang,

Tian

et al. 2024

Journal of Industrial and Engineering Chemistry

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Thermally activated delayed fluorescence dendrimers with strategic dendrons to construct highly efficient solution-processed OLEDs

Wu,

Wang,

Tian

et al. 2024

Journal of Industrial and Engineering Chemistry

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New Concept for HLCT Emitter: Acceptor Molecule in Exciplex System for Highly Efficient and Extremely Low-Efficiency Roll-Off Solution-Processed OLED

Yin,

Wu,

et al. 2024

ACS Materials Lett.

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The use of hybridized local and charge-transfer (HLCT) emitters as acceptor or donor molecules in exciplex systems is still a novel concept even though HLCT molecules can harvest both singlet and triplet excitons. Herein, two HLCT emitters, 2-t BuspoCz-2pTrz and 2-t BuspoCz-Me3pTrz, are prepared as acceptors of exciplexes with thermally activated delayed fluorescence (TADF) properties. The exciplex TADF systems constructed by mixing HLCT and TAPC molecules have a minute energy gap between singlet and triplet excited states and unity emission efficiency. Using the exciplex as an emitter, solution-processed devices achieve maximum external quantum efficiency (EQE max ) of 16.6%. Impressively, solutionprocessed devices with the fabricated exciplexes as hosts exhibit extremely low turn-on voltages and a promising EQE max of >20%, which is concomitant with an extremely low-efficiency roll-off of 0.5% at 1,000 cd m −2 . This study explores the potential of HLCT emitters as acceptors of exciplexes and guides the design of efficient exciplex systems.

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Multifunctional tris(triazolo)triazine-based emitter with dual-TADF, RTP, AIEE and AIDF properties

Ferreira,

Decarli,

Nyga

et al. 2024

J. Mater. Chem. C

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Hybridized local and charge transfer dendrimers with near-unity exciton utilization for enabling high-efficiency solution-processed hyperfluorescent OLEDs

Abstract: Realizing both high emission efficiency and exciton utilization efficiency (ηS) is still a formidable task for hot exciton materials. In this contribution, a prove-to-concept of improving the ηS in hot...

Cited by 4 publications

References 48 publications

Thermally activated delayed fluorescence dendrimers with strategic dendrons to construct highly efficient solution-processed OLEDs

Thermally activated delayed fluorescence dendrimers with strategic dendrons to construct highly efficient solution-processed OLEDs

New Concept for HLCT Emitter: Acceptor Molecule in Exciplex System for Highly Efficient and Extremely Low-Efficiency Roll-Off Solution-Processed OLED

Multifunctional tris(triazolo)triazine-based emitter with dual-TADF, RTP, AIEE and AIDF properties

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