Hybridized Multi-Spiral Donor Engineering for High-Efficiency Narrowband Thermally Activated Delayed Fluorescence Emitters

Yu Tao Yang; Yi Cheng Zhao; Hao Ze Li; Feng Ming Xie; Yan Qing Li; Jian Xin Tang

doi:10.1002/anie.202518014

Hybridized Multi-Spiral Donor Engineering for High-Efficiency Narrowband Thermally Activated Delayed Fluorescence Emitters

Yu Tao Yang
, Yi Cheng Zhao
, Hao Ze Li
, Feng Ming Xie^*
, Yan Qing Li^*
, Jian Xin Tang^*

^*Corresponding author for this work

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The pursuit of narrowband multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters with both high efficiency and color purity remains a critical challenge in the field of organic light-emitting diodes (OLEDs). A novel molecular design paradigm is proposed by hybridizing di-/tri-spiral donors in polycyclic heteroaromatic frameworks. The orthogonal, sterically hindered spiral donors disrupt molecular planarity, which can simultaneously suppress the aggregation-caused quenching and spectral broadening. These emitters exhibit narrowband emission with full-width at half-maximum of 22–24 nm and high photoluminescence quantum yields of ∼100%. The tri-spiral donor configuration further improves horizontal dipole orientation for the enhanced light outcoupling. As a result, the optimal Ts-NBN-based OLED achieves a maximum external quantum efficiency of 39.1% with the CIE y value of 0.70.

Original language	English
Article number	e202518014
Journal	Angewandte Chemie - International Edition
Volume	64
Issue number	46
DOIs	https://doi.org/10.1002/anie.202518014
State	Published - 10 Nov 2025

Keywords

Multi-resonance
Narrowband
Organic light-emitting diodes
Spiral donor
Thermally activated delayed fluorescence

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10.1002/anie.202518014

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@article{ccf3dc23ee8e47359973b9fe38723a5a,

title = "Hybridized Multi-Spiral Donor Engineering for High-Efficiency Narrowband Thermally Activated Delayed Fluorescence Emitters",

abstract = "The pursuit of narrowband multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters with both high efficiency and color purity remains a critical challenge in the field of organic light-emitting diodes (OLEDs). A novel molecular design paradigm is proposed by hybridizing di-/tri-spiral donors in polycyclic heteroaromatic frameworks. The orthogonal, sterically hindered spiral donors disrupt molecular planarity, which can simultaneously suppress the aggregation-caused quenching and spectral broadening. These emitters exhibit narrowband emission with full-width at half-maximum of 22–24 nm and high photoluminescence quantum yields of ∼100\%. The tri-spiral donor configuration further improves horizontal dipole orientation for the enhanced light outcoupling. As a result, the optimal Ts-NBN-based OLED achieves a maximum external quantum efficiency of 39.1\% with the CIE y value of 0.70.",

keywords = "Multi-resonance, Narrowband, Organic light-emitting diodes, Spiral donor, Thermally activated delayed fluorescence",

author = "Yang, \{Yu Tao\} and Zhao, \{Yi Cheng\} and Li, \{Hao Ze\} and Xie, \{Feng Ming\} and Li, \{Yan Qing\} and Tang, \{Jian Xin\}",

note = "Publisher Copyright: {\textcopyright} 2025 Wiley-VCH GmbH.",

year = "2025",

month = nov,

day = "10",

doi = "10.1002/anie.202518014",

language = "英语",

volume = "64",

journal = "Angewandte Chemie - International Edition",

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publisher = "John Wiley and Sons Ltd",

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TY - JOUR

T1 - Hybridized Multi-Spiral Donor Engineering for High-Efficiency Narrowband Thermally Activated Delayed Fluorescence Emitters

AU - Yang, Yu Tao

AU - Zhao, Yi Cheng

AU - Li, Hao Ze

AU - Xie, Feng Ming

AU - Li, Yan Qing

AU - Tang, Jian Xin

PY - 2025/11/10

Y1 - 2025/11/10

N2 - The pursuit of narrowband multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters with both high efficiency and color purity remains a critical challenge in the field of organic light-emitting diodes (OLEDs). A novel molecular design paradigm is proposed by hybridizing di-/tri-spiral donors in polycyclic heteroaromatic frameworks. The orthogonal, sterically hindered spiral donors disrupt molecular planarity, which can simultaneously suppress the aggregation-caused quenching and spectral broadening. These emitters exhibit narrowband emission with full-width at half-maximum of 22–24 nm and high photoluminescence quantum yields of ∼100%. The tri-spiral donor configuration further improves horizontal dipole orientation for the enhanced light outcoupling. As a result, the optimal Ts-NBN-based OLED achieves a maximum external quantum efficiency of 39.1% with the CIE y value of 0.70.

AB - The pursuit of narrowband multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters with both high efficiency and color purity remains a critical challenge in the field of organic light-emitting diodes (OLEDs). A novel molecular design paradigm is proposed by hybridizing di-/tri-spiral donors in polycyclic heteroaromatic frameworks. The orthogonal, sterically hindered spiral donors disrupt molecular planarity, which can simultaneously suppress the aggregation-caused quenching and spectral broadening. These emitters exhibit narrowband emission with full-width at half-maximum of 22–24 nm and high photoluminescence quantum yields of ∼100%. The tri-spiral donor configuration further improves horizontal dipole orientation for the enhanced light outcoupling. As a result, the optimal Ts-NBN-based OLED achieves a maximum external quantum efficiency of 39.1% with the CIE y value of 0.70.

KW - Multi-resonance

KW - Narrowband

KW - Organic light-emitting diodes

KW - Spiral donor

KW - Thermally activated delayed fluorescence

UR - https://www.scopus.com/pages/publications/105016803361

U2 - 10.1002/anie.202518014

DO - 10.1002/anie.202518014

M3 - 文章

AN - SCOPUS:105016803361

SN - 1433-7851

VL - 64

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 46

M1 - e202518014

ER -

Hybridized Multi-Spiral Donor Engineering for High-Efficiency Narrowband Thermally Activated Delayed Fluorescence Emitters

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Keywords

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