Highly effective nicotinonitrile-derivatives-based thermally activated delayed fluorescence emitter with asymmetric molecular architecture for high-performance organic light-emitting diodes

Shin Hyung Choi; Chan Hee Lee; Chihaya Adachi; Sae Youn Lee

doi:10.1016/j.dyepig.2019.107849

Highly effective nicotinonitrile-derivatives-based thermally activated delayed fluorescence emitter with asymmetric molecular architecture for high-performance organic light-emitting diodes

Shin Hyung Choi, Chan Hee Lee, Chihaya Adachi, Sae Youn Lee

応用化学

研究成果: ジャーナルへの寄稿 › 学術誌 › 査読

6 被引用数 (Scopus)

抄録

In this paper, we report a new molecular architecture for increasing the emission efficiency of nicotinonitrile-derivatives-based donor-acceptor-donor combined thermally activated delayed fluorescence (TADF) emitters with asymmetric molecular architecture. The proposed molecular design facilitates highly effective TADF emission through a relatively small singlet (S₁) and triplet (T₁) energy gap (ΔE_ST ≈ 0.1 eV) and provides an increased reverse intersystem crossing efficiency (Φ_RISC) of up to 86% from T₁ to S₁ states. Organic light-emitting diodes (OLEDs) employing the proposed asymmetric nicotinonitrile derivatives as emitters exhibit external quantum efficiencies (η_ext) of up to 18.5% in greenish-blue and green emissions.

本文言語	英語
論文番号	107849
ジャーナル	Dyes and Pigments
巻	172
DOI	https://doi.org/10.1016/j.dyepig.2019.107849
出版ステータス	出版済み - 1月 2020

!!!All Science Journal Classification (ASJC) codes

化学工学（全般）
プロセス化学およびプロセス工学

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10.1016/j.dyepig.2019.107849

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引用スタイル

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title = "Highly effective nicotinonitrile-derivatives-based thermally activated delayed fluorescence emitter with asymmetric molecular architecture for high-performance organic light-emitting diodes",

abstract = "In this paper, we report a new molecular architecture for increasing the emission efficiency of nicotinonitrile-derivatives-based donor-acceptor-donor combined thermally activated delayed fluorescence (TADF) emitters with asymmetric molecular architecture. The proposed molecular design facilitates highly effective TADF emission through a relatively small singlet (S1) and triplet (T1) energy gap (ΔEST ≈ 0.1 eV) and provides an increased reverse intersystem crossing efficiency (ΦRISC) of up to 86% from T1 to S1 states. Organic light-emitting diodes (OLEDs) employing the proposed asymmetric nicotinonitrile derivatives as emitters exhibit external quantum efficiencies (ηext) of up to 18.5% in greenish-blue and green emissions.",

author = "Choi, {Shin Hyung} and Lee, {Chan Hee} and Chihaya Adachi and Lee, {Sae Youn}",

note = "Funding Information: This work was supported in part by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT & Future Planning (grant number: 2018R1C1B5044977 ) for S. Y. Lee and the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (grant number: 20194030202320 ) awarded to S. H. Choi and C. H. Lee. C. Adachi acknowledges support from the Japan Science and Technology Agency (JST), ERATO , Adachi Molecular Exciton Engineering Project, under JST ERATO Grant Number JPMJER1305 , Japan, and the International Institute for Carbon Neutral Energy Research ( WPI-I2CNER ) sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) . The authors thank J. U. Kim for measurement of photophysical properties and fruitful discussions regarding this work. Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

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doi = "10.1016/j.dyepig.2019.107849",

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AU - Choi, Shin Hyung

AU - Lee, Chan Hee

AU - Adachi, Chihaya

AU - Lee, Sae Youn

N1 - Funding Information: This work was supported in part by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT & Future Planning (grant number: 2018R1C1B5044977 ) for S. Y. Lee and the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (grant number: 20194030202320 ) awarded to S. H. Choi and C. H. Lee. C. Adachi acknowledges support from the Japan Science and Technology Agency (JST), ERATO , Adachi Molecular Exciton Engineering Project, under JST ERATO Grant Number JPMJER1305 , Japan, and the International Institute for Carbon Neutral Energy Research ( WPI-I2CNER ) sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) . The authors thank J. U. Kim for measurement of photophysical properties and fruitful discussions regarding this work. Publisher Copyright: © 2019 Elsevier Ltd

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